{"id":10330,"date":"2026-08-01T16:08:52","date_gmt":"2026-08-01T16:08:52","guid":{"rendered":"https:\/\/ghinox.opuspixelum.net\/?page_id=1323"},"modified":"2026-09-05T05:10:58","modified_gmt":"2026-09-05T05:10:58","slug":"sus-439l","status":"publish","type":"page","link":"https:\/\/ghinox.opuspixelum.net\/zh-hant\/sus-439l\/","title":{"rendered":"SUS 439L"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"10330\" class=\"elementor elementor-10330 elementor-1323\" data-elementor-settings=\"{&quot;element_pack_global_tooltip_width&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;element_pack_global_tooltip_width_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;element_pack_global_tooltip_width_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;element_pack_global_tooltip_padding&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true},&quot;element_pack_global_tooltip_padding_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true},&quot;element_pack_global_tooltip_padding_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true},&quot;element_pack_global_tooltip_border_radius&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true},&quot;element_pack_global_tooltip_border_radius_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true},&quot;element_pack_global_tooltip_border_radius_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true}}\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ea80418 e-flex e-con-boxed e-con e-parent\" data-id=\"ea80418\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4fd0ff5 elementor-widget elementor-widget-text-editor\" data-id=\"4fd0ff5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>STAINLESS STEEL GRADE<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-843f124 elementor-widget elementor-widget-heading\" data-id=\"843f124\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">SUS 439L Stainless Steel<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3bb6a78 elementor-widget elementor-widget-text-editor\" data-id=\"3bb6a78\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"1130\" data-end=\"1361\">SUS 439 is a low-carbon, titanium-stabilized ferritic stainless steel containing approximately 17\u201319% chromium. It combines good corrosion resistance, oxidation resistance, weldability, formability, and thermal-fatigue performance.<\/p><p data-start=\"1363\" data-end=\"1643\">Compared with SUS 409L, its higher chromium content provides better resistance to atmospheric corrosion and exhaust condensates. Compared with austenitic grades such as SUS 304, SUS 439 is magnetic, contains little or no deliberately added nickel, and has lower thermal expansion.<\/p><p data-start=\"1645\" data-end=\"1880\">These characteristics make SUS 439 suitable for automotive exhaust systems, heat exchangers, hot-water tanks, appliance components, kitchen equipment, and fabricated parts exposed to moderate corrosion and repeated temperature changes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9bbfn4k elementor-reverse-mobile elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9bbfn4k\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-bf6d5f6\" data-id=\"bf6d5f6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-affa6ba elementor-widget elementor-widget-heading\" data-id=\"affa6ba\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">MATERIAL INTRODUCTION<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f5bc1bc elementor-widget elementor-widget-heading\" data-id=\"f5bc1bc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SUS 439L Stainless Steel Overview<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-928f6f9 elementor-widget elementor-widget-text-editor\" data-id=\"928f6f9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"1919\" data-end=\"2133\">SUS 439 belongs to the ferritic stainless steel family. Its ferritic crystal structure makes the material magnetic and gives it lower thermal expansion and higher thermal conductivity than common austenitic grades.<\/p><p data-start=\"2135\" data-end=\"2397\">Titanium stabilization helps control chromium-carbide formation during welding and elevated-temperature exposure. This improves resistance to weld-related sensitization and supports the production of welded tubes, tanks, exhaust parts, and fabricated assemblies.<\/p><p data-start=\"2399\" data-end=\"2599\">Type 439 is broadly associated with UNS S43035 and EN 1.4510, although equivalent designations may have different composition limits, mechanical requirements, testing methods, and certification rules.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-6c57c32\" data-id=\"6c57c32\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7e2b2ee elementor-widget elementor-widget-image\" data-id=\"7e2b2ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1000\" height=\"1000\" src=\"https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/08\/sus-409l-automotive-exhaust-applications-1000x1000-1.jpg\" class=\"attachment-full size-full wp-image-1306\" alt=\"sus 409l automotive exhaust applications 1000x1000\" srcset=\"https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/08\/sus-409l-automotive-exhaust-applications-1000x1000-1.jpg 1000w, https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/08\/sus-409l-automotive-exhaust-applications-1000x1000-1-300x300.jpg 300w, https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/08\/sus-409l-automotive-exhaust-applications-1000x1000-1-150x150.jpg 150w, https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/08\/sus-409l-automotive-exhaust-applications-1000x1000-1-768x768.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-43cb9d5 e-flex e-con-boxed e-con e-parent\" data-id=\"43cb9d5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d1d031f elementor-widget elementor-widget-heading\" data-id=\"d1d031f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SUS 439L Equivalent Grades<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5c95241 elementor-widget elementor-widget-text-editor\" data-id=\"5c95241\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<style>\n  .gh-439-equivalent {\n    margin: 32px 0;\n    color: #f5f5f5;\n    font-family: inherit;\n  }\n\n  .gh-439-equivalent .section-intro {\n    max-width: 900px;\n    margin: 0 0 20px;\n    color: #c8c8c8;\n    font-size: 16px;\n    line-height: 1.75;\n  }\n\n  .gh-439-equivalent .table-wrapper {\n    overflow-x: auto;\n    border: 1px solid #353535;\n    background: #111113;\n    -webkit-overflow-scrolling: touch;\n  }\n\n  .gh-439-equivalent table {\n    width: 100%;\n    min-width: 620px;\n    border-collapse: collapse;\n  }\n\n  .gh-439-equivalent th,\n  .gh-439-equivalent td {\n    padding: 14px 18px;\n    border-right: 1px solid #353535;\n    border-bottom: 1px solid #353535;\n    text-align: left;\n    vertical-align: middle;\n  }\n\n  .gh-439-equivalent th:last-child,\n  .gh-439-equivalent td:last-child {\n    border-right: 0;\n  }\n\n  .gh-439-equivalent tbody tr:last-child th,\n  .gh-439-equivalent tbody tr:last-child td {\n    border-bottom: 0;\n  }\n\n  .gh-439-equivalent thead th {\n    background: #171719;\n    color: #ffffff;\n    font-size: 14px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.04em;\n  }\n\n  .gh-439-equivalent tbody th {\n    width: 38%;\n    background: #202022;\n    color: #ffffff;\n    font-weight: 600;\n  }\n\n  .gh-439-equivalent tbody td {\n    background: #18181a;\n    color: #f4c400;\n    font-weight: 600;\n  }\n\n  .gh-439-equivalent tbody tr:hover th,\n  .gh-439-equivalent tbody tr:hover td {\n    background: #222218;\n  }\n\n  .gh-439-equivalent .grade-note {\n    margin: 14px 0 0;\n    color: #9c9c9c;\n    font-size: 12px;\n    line-height: 1.65;\n  }\n\n  .gh-439-equivalent .grade-note strong {\n    color: #f4c400;\n  }\n\n  @media (max-width: 767px) {\n    .gh-439-equivalent .section-intro {\n      font-size: 15px;\n    }\n\n    .gh-439-equivalent th,\n    .gh-439-equivalent td {\n      padding: 12px 14px;\n      font-size: 13px;\n    }\n  }\n<\/style>\n\n<section\n  class=\"gh-439-equivalent\"\n  aria-label=\"SUS 439 equivalent stainless steel grades\"\n>\n  <p class=\"section-intro\">\n    SUS 439 is a titanium-stabilized ferritic stainless steel broadly associated\n    with Type 439, UNS S43035, and EN 1.4510. These designations describe\n    comparable materials intended for applications requiring corrosion\n    resistance, weldability, and thermal-cycling performance.\n  <\/p>\n\n  <div\n    class=\"table-wrapper\"\n    role=\"region\"\n    aria-label=\"SUS 439 equivalent grade designations\"\n    tabindex=\"0\"\n  >\n    <table>\n      <thead>\n        <tr>\n          <th scope=\"col\">Standard or System<\/th>\n          <th scope=\"col\">Equivalent Designation<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n        <tr>\n          <th scope=\"row\">JIS<\/th>\n          <td>SUS 439<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">AISI<\/th>\n          <td>Type 439<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">ASTM \/ UNS<\/th>\n          <td>Type 439 \/ S43035<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">EN Material Number<\/th>\n          <td>1.4510<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">EN Steel Name<\/th>\n          <td>X3CrTi17<\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <p class=\"grade-note\">\n    <strong>Designation note:<\/strong> \u201cSUS 439L\u201d is sometimes used informally\n    to emphasize low carbon content, but the recognized JIS designation is\n    generally <strong>SUS 439<\/strong>. Equivalent grades are broadly comparable\n    rather than automatically interchangeable. Chemical limits, stabilization\n    requirements, mechanical properties, dimensions, testing, and certification\n    can vary by specification and product form.\n  <\/p>\n<\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0b98853 e-flex e-con-boxed e-con e-parent\" data-id=\"0b98853\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c5d31f7 elementor-widget elementor-widget-heading\" data-id=\"c5d31f7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Key Characteristics of SUS 439L<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe14648 elementor-widget elementor-widget-text-editor\" data-id=\"fe14648\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<style>\n  .gh-439-characteristics {\n    margin: 32px 0;\n    color: #f5f5f5;\n    font-family: inherit;\n  }\n\n  .gh-439-characteristics .section-intro {\n    max-width: 920px;\n    margin: 0 0 24px;\n    color: #c8c8c8;\n    font-size: 16px;\n    line-height: 1.75;\n  }\n\n  .gh-439-characteristics .characteristic-grid {\n    display: grid;\n    grid-template-columns: repeat(2, minmax(0, 1fr));\n    gap: 18px;\n  }\n\n  .gh-439-characteristics .characteristic-card {\n    position: relative;\n    min-height: 175px;\n    padding: 24px 24px 24px 30px;\n    overflow: hidden;\n    border: 1px solid #353535;\n    background: #171719;\n  }\n\n  .gh-439-characteristics .characteristic-card::before {\n    position: absolute;\n    top: 0;\n    bottom: 0;\n    left: 0;\n    width: 4px;\n    background: #f4c400;\n    content: \"\";\n  }\n\n  .gh-439-characteristics .card-number {\n    display: inline-flex;\n    align-items: center;\n    justify-content: center;\n    width: 34px;\n    height: 34px;\n    margin-bottom: 14px;\n    border: 1px solid #f4c400;\n    border-radius: 50%;\n    color: #f4c400;\n    font-size: 12px;\n    font-weight: 700;\n    line-height: 1;\n  }\n\n  .gh-439-characteristics h3 {\n    margin: 0 0 10px;\n    color: #ffffff;\n    font-size: 19px;\n    line-height: 1.35;\n  }\n\n  .gh-439-characteristics p {\n    margin: 0;\n    color: #c8c8c8;\n    font-size: 15px;\n    line-height: 1.7;\n  }\n\n  .gh-439-characteristics .characteristic-note {\n    margin: 18px 0 0;\n    color: #9c9c9c;\n    font-size: 12px;\n    line-height: 1.65;\n  }\n\n  .gh-439-characteristics .characteristic-note strong {\n    color: #f4c400;\n  }\n\n  @media (max-width: 767px) {\n    .gh-439-characteristics .characteristic-grid {\n      grid-template-columns: 1fr;\n    }\n\n    .gh-439-characteristics .section-intro {\n      font-size: 15px;\n    }\n\n    .gh-439-characteristics .characteristic-card {\n      min-height: auto;\n      padding: 20px 20px 20px 26px;\n    }\n\n    .gh-439-characteristics h3 {\n      font-size: 18px;\n    }\n\n    .gh-439-characteristics p {\n      font-size: 14px;\n    }\n  }\n<\/style>\n\n<section\n  class=\"gh-439-characteristics\"\n  aria-label=\"Key characteristics of SUS 439 stainless steel\"\n>\n  <p class=\"section-intro\">\n    SUS 439 is a low-carbon, titanium-stabilized ferritic stainless steel\n    designed to combine corrosion resistance, weldability, formability, and\n    dependable performance under repeated temperature changes. It is commonly\n    selected for automotive exhaust components, heat exchangers, hot-water\n    tanks, appliances, and welded tubing.\n  <\/p>\n\n  <div class=\"characteristic-grid\">\n    <article class=\"characteristic-card\">\n      <span class=\"card-number\" aria-hidden=\"true\">01<\/span>\n      <h3>Titanium-Stabilized Composition<\/h3>\n      <p>\n        Titanium binds carbon and nitrogen, helping reduce sensitization and\n        preserve corrosion resistance around properly fabricated welded areas.\n      <\/p>\n    <\/article>\n\n    <article class=\"characteristic-card\">\n      <span class=\"card-number\" aria-hidden=\"true\">02<\/span>\n      <h3>Good General Corrosion Resistance<\/h3>\n      <p>\n        Its approximately 17\u201319% chromium content provides better general\n        corrosion resistance than lower-chromium ferritic grades such as\n        SUS 409L.\n      <\/p>\n    <\/article>\n\n    <article class=\"characteristic-card\">\n      <span class=\"card-number\" aria-hidden=\"true\">03<\/span>\n      <h3>Good Oxidation Resistance<\/h3>\n      <p>\n        SUS 439 offers useful resistance to oxidation and scaling in compatible\n        elevated-temperature applications, including selected exhaust and\n        heating components.\n      <\/p>\n    <\/article>\n\n    <article class=\"characteristic-card\">\n      <span class=\"card-number\" aria-hidden=\"true\">04<\/span>\n      <h3>Strong Thermal-Cycling Performance<\/h3>\n      <p>\n        Its relatively low thermal expansion helps reduce thermal stress during\n        repeated heating and cooling, supporting exhaust-system and heat-related\n        applications.\n      <\/p>\n    <\/article>\n\n    <article class=\"characteristic-card\">\n      <span class=\"card-number\" aria-hidden=\"true\">05<\/span>\n      <h3>Good Weldability<\/h3>\n      <p>\n        The stabilized composition makes SUS 439 suitable for welded tubing,\n        tanks, heat exchangers, and fabricated assemblies when appropriate\n        ferritic stainless steel procedures are used.\n      <\/p>\n    <\/article>\n\n    <article class=\"characteristic-card\">\n      <span class=\"card-number\" aria-hidden=\"true\">06<\/span>\n      <h3>Good Formability<\/h3>\n      <p>\n        The grade can be bent, roll-formed, stamped, drawn, and formed into\n        tubing and complex components. Formability depends on thickness,\n        condition, tooling, and forming direction.\n      <\/p>\n    <\/article>\n\n    <article class=\"characteristic-card\">\n      <span class=\"card-number\" aria-hidden=\"true\">07<\/span>\n      <h3>Efficient Heat Transfer<\/h3>\n      <p>\n        SUS 439 generally provides higher thermal conductivity than common\n        austenitic stainless steels, supporting selected heat exchangers,\n        burners, and thermally cycled components.\n      <\/p>\n    <\/article>\n\n    <article class=\"characteristic-card\">\n      <span class=\"card-number\" aria-hidden=\"true\">08<\/span>\n      <h3>Lower Thermal Expansion<\/h3>\n      <p>\n        Its ferritic structure expands less than austenitic grades such as\n        SUS 304, helping improve dimensional stability during temperature\n        changes.\n      <\/p>\n    <\/article>\n\n    <article class=\"characteristic-card\">\n      <span class=\"card-number\" aria-hidden=\"true\">09<\/span>\n      <h3>Naturally Magnetic<\/h3>\n      <p>\n        SUS 439 has a ferritic microstructure and is magnetic in both annealed\n        and cold-worked conditions.\n      <\/p>\n    <\/article>\n\n    <article class=\"characteristic-card\">\n      <span class=\"card-number\" aria-hidden=\"true\">10<\/span>\n      <h3>Nickel-Efficient Material<\/h3>\n      <p>\n        Because the grade does not depend on the high nickel content used in\n        austenitic stainless steels, it can offer stable alloy costs for\n        compatible applications.\n      <\/p>\n    <\/article>\n  <\/div>\n\n  <p class=\"characteristic-note\">\n    <strong>Designation note:<\/strong> The recognized JIS designation is\n    generally <strong>SUS 439<\/strong>. \u201cSUS 439L\u201d may be used informally to\n    emphasize its low-carbon composition. Final material selection should be\n    based on the applicable specification, service environment, product form,\n    and material test certificate.\n  <\/p>\n<\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2a4aa00 e-flex e-con-boxed e-con e-parent\" data-id=\"2a4aa00\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-01e359b elementor-widget elementor-widget-heading\" data-id=\"01e359b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SUS 439LChemical Composition<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1f333d elementor-widget elementor-widget-text-editor\" data-id=\"f1f333d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<style>\n  .gh-439-chemical {\n    margin: 32px 0;\n    color: #f5f5f5;\n    font-family: inherit;\n  }\n\n  .gh-439-chemical .section-intro {\n    max-width: 920px;\n    margin: 0 0 20px;\n    color: #c8c8c8;\n    font-size: 16px;\n    line-height: 1.75;\n  }\n\n  .gh-439-chemical .table-wrapper {\n    overflow-x: auto;\n    border: 1px solid #353535;\n    background: #111113;\n    -webkit-overflow-scrolling: touch;\n  }\n\n  .gh-439-chemical table {\n    width: 100%;\n    min-width: 700px;\n    border-collapse: collapse;\n  }\n\n  .gh-439-chemical th,\n  .gh-439-chemical td {\n    padding: 14px 18px;\n    border-right: 1px solid #353535;\n    border-bottom: 1px solid #353535;\n    text-align: left;\n    vertical-align: middle;\n  }\n\n  .gh-439-chemical th:last-child,\n  .gh-439-chemical td:last-child {\n    border-right: 0;\n  }\n\n  .gh-439-chemical tbody tr:last-child th,\n  .gh-439-chemical tbody tr:last-child td {\n    border-bottom: 0;\n  }\n\n  .gh-439-chemical thead th {\n    background: #171719;\n    color: #ffffff;\n    font-size: 14px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.04em;\n  }\n\n  .gh-439-chemical tbody th {\n    width: 34%;\n    background: #202022;\n    color: #ffffff;\n    font-weight: 600;\n  }\n\n  .gh-439-chemical tbody td {\n    background: #18181a;\n    color: #f4c400;\n    font-weight: 600;\n  }\n\n  .gh-439-chemical tbody tr:hover th,\n  .gh-439-chemical tbody tr:hover td {\n    background: #222218;\n  }\n\n  .gh-439-chemical .composition-note {\n    margin: 14px 0 0;\n    color: #9c9c9c;\n    font-size: 12px;\n    line-height: 1.65;\n  }\n\n  .gh-439-chemical .composition-note strong {\n    color: #f4c400;\n  }\n\n  @media (max-width: 767px) {\n    .gh-439-chemical .section-intro {\n      font-size: 15px;\n    }\n\n    .gh-439-chemical th,\n    .gh-439-chemical td {\n      padding: 12px 14px;\n      font-size: 13px;\n    }\n  }\n<\/style>\n\n<section\n  class=\"gh-439-chemical\"\n  aria-label=\"Chemical composition of SUS 439 stainless steel\"\n>\n  <p class=\"section-intro\">\n    SUS 439 is a low-carbon ferritic stainless steel containing approximately\n    17\u201319% chromium. Titanium stabilizes carbon and nitrogen, helping improve\n    weldability and resistance to sensitization during fabrication and\n    elevated-temperature service.\n  <\/p>\n\n  <div\n    class=\"table-wrapper\"\n    role=\"region\"\n    aria-label=\"SUS 439 chemical composition percentage\"\n    tabindex=\"0\"\n  >\n    <table>\n      <thead>\n        <tr>\n          <th scope=\"col\">Element<\/th>\n          <th scope=\"col\">Minimum<\/th>\n          <th scope=\"col\">Maximum<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n        <tr>\n          <th scope=\"row\">Carbon (C)<\/th>\n          <td>\u2014<\/td>\n          <td>0.030%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Silicon (Si)<\/th>\n          <td>\u2014<\/td>\n          <td>1.00%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Manganese (Mn)<\/th>\n          <td>\u2014<\/td>\n          <td>1.00%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Phosphorus (P)<\/th>\n          <td>\u2014<\/td>\n          <td>0.040%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Sulfur (S)<\/th>\n          <td>\u2014<\/td>\n          <td>0.030%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Chromium (Cr)<\/th>\n          <td>17.00%<\/td>\n          <td>19.00%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Nickel (Ni)<\/th>\n          <td>\u2014<\/td>\n          <td>0.50%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Nitrogen (N)<\/th>\n          <td>\u2014<\/td>\n          <td>0.030%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Aluminum (Al)<\/th>\n          <td>\u2014<\/td>\n          <td>0.150%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Titanium (Ti)<\/th>\n          <td>0.20 + 4(C + N)<\/td>\n          <td>0.75%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Iron (Fe)<\/th>\n          <td>Balance<\/td>\n          <td>Balance<\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <p class=\"composition-note\">\n    Values are common reference limits for Type 439 \/ UNS S43035 and may differ\n    from specific JIS, ASTM, EN, mill, or product-form requirements.\n    <strong>Titanium is controlled by a stabilization formula<\/strong> based on\n    carbon and nitrogen content. Use the governing material specification and\n    mill test certificate for procurement and compliance. The recognized JIS\n    designation is generally <strong>SUS 439<\/strong>; \u201cSUS 439L\u201d is sometimes\n    used informally to emphasize its low-carbon composition.\n  <\/p>\n<\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-53a9c91 e-flex e-con-boxed e-con e-parent\" data-id=\"53a9c91\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-15b9ae5 elementor-widget elementor-widget-heading\" data-id=\"15b9ae5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SUS 439L Mechanical Properties<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-25e75f0 elementor-widget elementor-widget-text-editor\" data-id=\"25e75f0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<style>\n  .gh-439-mechanical {\n    margin: 32px 0;\n    color: #f5f5f5;\n    font-family: inherit;\n  }\n\n  .gh-439-mechanical .section-intro {\n    max-width: 920px;\n    margin: 0 0 20px;\n    color: #c8c8c8;\n    font-size: 16px;\n    line-height: 1.75;\n  }\n\n  .gh-439-mechanical .table-wrapper {\n    overflow-x: auto;\n    border: 1px solid #353535;\n    background: #111113;\n    -webkit-overflow-scrolling: touch;\n  }\n\n  .gh-439-mechanical table {\n    width: 100%;\n    min-width: 680px;\n    border-collapse: collapse;\n  }\n\n  .gh-439-mechanical th,\n  .gh-439-mechanical td {\n    padding: 14px 18px;\n    border-right: 1px solid #353535;\n    border-bottom: 1px solid #353535;\n    text-align: left;\n    vertical-align: middle;\n  }\n\n  .gh-439-mechanical th:last-child,\n  .gh-439-mechanical td:last-child {\n    border-right: 0;\n  }\n\n  .gh-439-mechanical tbody tr:last-child th,\n  .gh-439-mechanical tbody tr:last-child td {\n    border-bottom: 0;\n  }\n\n  .gh-439-mechanical thead th {\n    background: #171719;\n    color: #ffffff;\n    font-size: 14px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.04em;\n  }\n\n  .gh-439-mechanical tbody th {\n    width: 40%;\n    background: #202022;\n    color: #ffffff;\n    font-weight: 600;\n  }\n\n  .gh-439-mechanical tbody td {\n    background: #18181a;\n    color: #f4c400;\n    font-weight: 600;\n  }\n\n  .gh-439-mechanical tbody tr:hover th,\n  .gh-439-mechanical tbody tr:hover td {\n    background: #222218;\n  }\n\n  .gh-439-mechanical .property-note {\n    margin: 14px 0 0;\n    color: #9c9c9c;\n    font-size: 12px;\n    line-height: 1.65;\n  }\n\n  .gh-439-mechanical .property-note strong {\n    color: #f4c400;\n  }\n\n  @media (max-width: 767px) {\n    .gh-439-mechanical .section-intro {\n      font-size: 15px;\n    }\n\n    .gh-439-mechanical th,\n    .gh-439-mechanical td {\n      padding: 12px 14px;\n      font-size: 13px;\n    }\n  }\n<\/style>\n\n<section\n  class=\"gh-439-mechanical\"\n  aria-label=\"Mechanical properties of SUS 439 stainless steel\"\n>\n  <p class=\"section-intro\">\n    Annealed SUS 439 provides moderate strength and useful ductility for\n    automotive exhaust components, heat exchangers, hot-water tanks, appliance\n    parts, welded tubing, and other fabricated products exposed to repeated\n    temperature changes.\n  <\/p>\n\n  <div\n    class=\"table-wrapper\"\n    role=\"region\"\n    aria-label=\"SUS 439 mechanical properties\"\n    tabindex=\"0\"\n  >\n    <table>\n      <thead>\n        <tr>\n          <th scope=\"col\">Mechanical Property<\/th>\n          <th scope=\"col\">Requirement<\/th>\n          <th scope=\"col\">Unit<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n        <tr>\n          <th scope=\"row\">0.2% Proof Strength<\/th>\n          <td>&ge;205<\/td>\n          <td>MPa (N\/mm\u00b2)<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Tensile Strength<\/th>\n          <td>&ge;415<\/td>\n          <td>MPa (N\/mm\u00b2)<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Elongation<\/th>\n          <td>&ge;22<\/td>\n          <td>%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Rockwell Hardness<\/th>\n          <td>&le;89<\/td>\n          <td>HRB<\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <p class=\"property-note\">\n    These are common reference values for annealed flat products. Mechanical\n    requirements vary according to the governing JIS, ASTM, or EN standard,\n    product form, thickness, heat treatment, processing condition, and test\n    direction. Confirm final requirements using the applicable specification\n    and material test certificate. The recognized JIS designation is generally\n    <strong>SUS 439<\/strong>; \u201cSUS 439L\u201d may be used informally to emphasize its\n    low-carbon composition.\n  <\/p>\n<\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-fddd647 e-flex e-con-boxed e-con e-parent\" data-id=\"fddd647\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3b1745f elementor-widget elementor-widget-heading\" data-id=\"3b1745f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Physical Properties of SUS 439L<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e9d2e0 elementor-widget elementor-widget-text-editor\" data-id=\"3e9d2e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<style>\n  .gh-439-physical {\n    margin: 32px 0;\n    color: #f5f5f5;\n    font-family: inherit;\n  }\n\n  .gh-439-physical .section-intro {\n    max-width: 920px;\n    margin: 0 0 20px;\n    color: #c8c8c8;\n    font-size: 16px;\n    line-height: 1.75;\n  }\n\n  .gh-439-physical .table-wrapper {\n    overflow-x: auto;\n    border: 1px solid #353535;\n    background: #111113;\n    -webkit-overflow-scrolling: touch;\n  }\n\n  .gh-439-physical table {\n    width: 100%;\n    min-width: 680px;\n    border-collapse: collapse;\n  }\n\n  .gh-439-physical th,\n  .gh-439-physical td {\n    padding: 14px 18px;\n    border-right: 1px solid #353535;\n    border-bottom: 1px solid #353535;\n    text-align: left;\n    vertical-align: middle;\n  }\n\n  .gh-439-physical th:last-child,\n  .gh-439-physical td:last-child {\n    border-right: 0;\n  }\n\n  .gh-439-physical tbody tr:last-child th,\n  .gh-439-physical tbody tr:last-child td {\n    border-bottom: 0;\n  }\n\n  .gh-439-physical thead th {\n    background: #171719;\n    color: #ffffff;\n    font-size: 14px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.04em;\n  }\n\n  .gh-439-physical tbody th {\n    width: 42%;\n    background: #202022;\n    color: #ffffff;\n    font-weight: 600;\n  }\n\n  .gh-439-physical tbody td {\n    background: #18181a;\n    color: #f4c400;\n    font-weight: 600;\n  }\n\n  .gh-439-physical tbody tr:hover th,\n  .gh-439-physical tbody tr:hover td {\n    background: #222218;\n  }\n\n  .gh-439-physical .property-note {\n    margin: 14px 0 0;\n    color: #9c9c9c;\n    font-size: 12px;\n    line-height: 1.65;\n  }\n\n  .gh-439-physical .property-note strong {\n    color: #f4c400;\n  }\n\n  @media (max-width: 767px) {\n    .gh-439-physical .section-intro {\n      font-size: 15px;\n    }\n\n    .gh-439-physical th,\n    .gh-439-physical td {\n      padding: 12px 14px;\n      font-size: 13px;\n    }\n  }\n<\/style>\n\n<section\n  class=\"gh-439-physical\"\n  aria-label=\"Physical properties of SUS 439 stainless steel\"\n>\n  <p class=\"section-intro\">\n    SUS 439 has higher thermal conductivity and lower thermal expansion than\n    common austenitic stainless steels. These properties support dimensional\n    stability, heat transfer, and thermal-fatigue performance in automotive\n    exhaust systems, heat exchangers, hot-water tanks, and heating components.\n  <\/p>\n\n  <div\n    class=\"table-wrapper\"\n    role=\"region\"\n    aria-label=\"Physical properties of SUS 439 stainless steel\"\n    tabindex=\"0\"\n  >\n    <table>\n      <thead>\n        <tr>\n          <th scope=\"col\">Physical Property<\/th>\n          <th scope=\"col\">Reference Value<\/th>\n          <th scope=\"col\">Unit<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n        <tr>\n          <th scope=\"row\">Density<\/th>\n          <td>Approx. 7.7<\/td>\n          <td>g\/cm\u00b3<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Elastic Modulus<\/th>\n          <td>Approx. 200\u2013220<\/td>\n          <td>GPa<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Thermal Conductivity<\/th>\n          <td>Approx. 25\u201326<\/td>\n          <td>W\/m\u00b7K<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Specific Heat Capacity<\/th>\n          <td>Approx. 460<\/td>\n          <td>J\/kg\u00b7K<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Mean Thermal Expansion<\/th>\n          <td>Approx. 10\u201311<\/td>\n          <td>\u00b5m\/m\u00b7K<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Electrical Resistivity<\/th>\n          <td>Approx. 0.60<\/td>\n          <td>\u00b5\u03a9\u00b7m<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Magnetic Response<\/th>\n          <td>Magnetic<\/td>\n          <td>\u2014<\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <p class=\"property-note\">\n    Values are approximate room-temperature references and may vary with\n    composition, product form, processing condition, temperature, and testing\n    method. Use the applicable material standard and supplier documentation for\n    engineering calculations. The recognized JIS designation is generally\n    <strong>SUS 439<\/strong>; \u201cSUS 439L\u201d may be used informally to emphasize its\n    low-carbon composition.\n  <\/p>\n<\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e06146f e-flex e-con-boxed e-con e-parent\" data-id=\"e06146f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7659785 elementor-widget elementor-widget-heading\" data-id=\"7659785\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SUS 439 vs. SUS 409L<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-22d8d22 elementor-widget elementor-widget-text-editor\" data-id=\"22d8d22\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<style>\n  .gh-439-vs-409l {\n    margin: 32px 0;\n    color: #f5f5f5;\n    font-family: inherit;\n  }\n\n  .gh-439-vs-409l .section-intro {\n    max-width: 920px;\n    margin: 0 0 20px;\n    color: #c8c8c8;\n    font-size: 16px;\n    line-height: 1.75;\n  }\n\n  .gh-439-vs-409l .table-wrapper {\n    overflow-x: auto;\n    border: 1px solid #353535;\n    background: #111113;\n    -webkit-overflow-scrolling: touch;\n  }\n\n  .gh-439-vs-409l table {\n    width: 100%;\n    min-width: 760px;\n    border-collapse: collapse;\n  }\n\n  .gh-439-vs-409l th,\n  .gh-439-vs-409l td {\n    padding: 14px 18px;\n    border-right: 1px solid #353535;\n    border-bottom: 1px solid #353535;\n    text-align: left;\n    vertical-align: top;\n  }\n\n  .gh-439-vs-409l th:last-child,\n  .gh-439-vs-409l td:last-child {\n    border-right: 0;\n  }\n\n  .gh-439-vs-409l tbody tr:last-child th,\n  .gh-439-vs-409l tbody tr:last-child td {\n    border-bottom: 0;\n  }\n\n  .gh-439-vs-409l thead th {\n    background: #171719;\n    color: #ffffff;\n    font-size: 14px;\n    font-weight: 700;\n    text-transform: uppercase;\n    letter-spacing: 0.04em;\n  }\n\n  .gh-439-vs-409l thead th:not(:first-child) {\n    color: #f4c400;\n  }\n\n  .gh-439-vs-409l tbody th {\n    width: 26%;\n    background: #202022;\n    color: #ffffff;\n    font-weight: 600;\n  }\n\n  .gh-439-vs-409l tbody td {\n    width: 37%;\n    background: #18181a;\n    color: #d8d8d8;\n    line-height: 1.6;\n  }\n\n  .gh-439-vs-409l tbody tr:hover th,\n  .gh-439-vs-409l tbody tr:hover td {\n    background: #222218;\n  }\n\n  .gh-439-vs-409l .highlight {\n    color: #f4c400;\n    font-weight: 600;\n  }\n\n  .gh-439-vs-409l .comparison-note {\n    margin: 14px 0 0;\n    color: #9c9c9c;\n    font-size: 12px;\n    line-height: 1.65;\n  }\n\n  @media (max-width: 767px) {\n    .gh-439-vs-409l .section-intro {\n      font-size: 15px;\n    }\n\n    .gh-439-vs-409l th,\n    .gh-439-vs-409l td {\n      padding: 12px 14px;\n      font-size: 13px;\n    }\n  }\n<\/style>\n\n<section\n  class=\"gh-439-vs-409l\"\n  aria-label=\"Comparison of SUS 439 and SUS 409L stainless steel\"\n>\n  <p class=\"section-intro\">\n    SUS 439 and SUS 409L are stabilized ferritic stainless steels commonly\n    evaluated for automotive exhaust and thermally cycled components. SUS 439\n    contains more chromium and generally provides better corrosion resistance,\n    oxidation resistance, and surface appearance, while SUS 409L is frequently\n    selected for cost-sensitive functional exhaust components.\n  <\/p>\n\n  <div\n    class=\"table-wrapper\"\n    role=\"region\"\n    aria-label=\"SUS 439 versus SUS 409L comparison\"\n    tabindex=\"0\"\n  >\n    <table>\n      <thead>\n        <tr>\n          <th scope=\"col\">Feature<\/th>\n          <th scope=\"col\">SUS 439<\/th>\n          <th scope=\"col\">SUS 409L<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n        <tr>\n          <th scope=\"row\">Stainless Steel Family<\/th>\n          <td>Ferritic stainless steel<\/td>\n          <td>Ferritic stainless steel<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Chromium Content<\/th>\n          <td>Approximately <span class=\"highlight\">17\u201319%<\/span><\/td>\n          <td>Approximately <span class=\"highlight\">10.5\u201311.75%<\/span><\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Carbon Content<\/th>\n          <td>Maximum approximately 0.030%<\/td>\n          <td>Maximum approximately 0.030%<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Stabilization<\/th>\n          <td>\n            Primarily <span class=\"highlight\">titanium-stabilized<\/span>\n          <\/td>\n          <td>Titanium-stabilized<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">General Corrosion Resistance<\/th>\n          <td>\n            <span class=\"highlight\">Better than SUS 409L<\/span> in many mild\n            atmospheric, condensate, and aqueous environments\n          <\/td>\n          <td>\n            Moderate; better than carbon steel, but surface staining may occur\n          <\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Oxidation Resistance<\/th>\n          <td>\n            Generally better because of its higher chromium content\n          <\/td>\n          <td>\n            Suitable for many standard automotive exhaust applications\n          <\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Thermal-Cycling Performance<\/th>\n          <td>\n            Good dimensional stability and resistance to repeated temperature\n            changes\n          <\/td>\n          <td>\n            Good thermal-fatigue performance for cost-sensitive exhaust parts\n          <\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Weldability<\/th>\n          <td>\n            Good when suitable ferritic stainless steel procedures are used\n          <\/td>\n          <td>\n            Good when suitable ferritic stainless steel procedures are used\n          <\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Surface Appearance<\/th>\n          <td>\n            Better suited to applications requiring improved appearance and\n            staining resistance\n          <\/td>\n          <td>\n            Usually selected where functional performance is more important\n            than appearance\n          <\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Magnetic Response<\/th>\n          <td>Magnetic<\/td>\n          <td>Magnetic<\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Typical Applications<\/th>\n          <td>\n            Exhaust components, heat exchangers, hot-water tanks, appliance\n            parts, burners, and welded tubing\n          <\/td>\n          <td>\n            Exhaust pipes, mufflers, catalytic-converter shells, heat shields,\n            and industrial exhaust components\n          <\/td>\n        <\/tr>\n        <tr>\n          <th scope=\"row\">Common Selection Reason<\/th>\n          <td>\n            <span class=\"highlight\">Higher corrosion and oxidation resistance<\/span>\n            for more demanding ferritic stainless steel applications\n          <\/td>\n          <td>\n            <span class=\"highlight\">Lower-cost functional performance<\/span>\n            for compatible exhaust and thermal applications\n          <\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <p class=\"comparison-note\">\n    Neither grade is automatically suitable for seawater, severe chloride\n    exposure, strong acids, or highly corrosive chemical-processing\n    environments. Final selection should consider temperature, condensate\n    chemistry, chloride exposure, fabrication, required appearance, service\n    life, governing specification, and material test certificate.\n  <\/p>\n<\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-28462d4 e-flex e-con-boxed e-con e-parent\" data-id=\"28462d4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ba675c4 elementor-widget elementor-widget-heading\" data-id=\"ba675c4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Corrosion and Oxidation Resistance of SUS 439L<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b6c399b elementor-widget elementor-widget-text-editor\" data-id=\"b6c399b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<style>\n  .gh-439-resistance {\n    margin: 32px 0;\n    color: #f5f5f5;\n    font-family: inherit;\n  }\n\n  .gh-439-resistance p {\n    margin: 0;\n    color: #c8c8c8;\n    font-size: 16px;\n    line-height: 1.75;\n  }\n\n  .gh-439-resistance .resistance-intro {\n    max-width: 920px;\n    margin-bottom: 24px;\n  }\n\n  .gh-439-resistance .resistance-grid {\n    display: grid;\n    grid-template-columns: repeat(2, minmax(0, 1fr));\n    gap: 18px;\n  }\n\n  .gh-439-resistance .resistance-card {\n    position: relative;\n    padding: 24px 24px 24px 28px;\n    overflow: hidden;\n    border: 1px solid #353535;\n    background: #171719;\n  }\n\n  .gh-439-resistance .resistance-card::before {\n    position: absolute;\n    top: 0;\n    bottom: 0;\n    left: 0;\n    width: 4px;\n    background: #f4c400;\n    content: \"\";\n  }\n\n  .gh-439-resistance h3 {\n    margin: 0 0 12px;\n    color: #ffffff;\n    font-size: 19px;\n    line-height: 1.35;\n  }\n\n  .gh-439-resistance ul {\n    margin: 16px 0 0;\n    padding: 0;\n    list-style: none;\n  }\n\n  .gh-439-resistance li {\n    position: relative;\n    margin: 0 0 10px;\n    padding-left: 20px;\n    color: #d0d0d0;\n    font-size: 15px;\n    line-height: 1.6;\n  }\n\n  .gh-439-resistance li:last-child {\n    margin-bottom: 0;\n  }\n\n  .gh-439-resistance li::before {\n    position: absolute;\n    top: 0.65em;\n    left: 0;\n    width: 7px;\n    height: 7px;\n    border-radius: 50%;\n    background: #f4c400;\n    content: \"\";\n  }\n\n  .gh-439-resistance .highlight {\n    color: #f4c400;\n    font-weight: 600;\n  }\n\n  .gh-439-resistance .resistance-note {\n    margin-top: 18px;\n    padding: 18px 20px;\n    border: 1px solid #353535;\n    background: #111113;\n  }\n\n  .gh-439-resistance .resistance-note p {\n    color: #a8a8a8;\n    font-size: 13px;\n    line-height: 1.7;\n  }\n\n  @media (max-width: 767px) {\n    .gh-439-resistance .resistance-grid {\n      grid-template-columns: 1fr;\n    }\n\n    .gh-439-resistance p {\n      font-size: 15px;\n    }\n\n    .gh-439-resistance .resistance-card {\n      padding: 20px 20px 20px 24px;\n    }\n\n    .gh-439-resistance h3 {\n      font-size: 18px;\n    }\n\n    .gh-439-resistance li {\n      font-size: 14px;\n    }\n  }\n<\/style>\n\n<section\n  class=\"gh-439-resistance\"\n  aria-label=\"Corrosion and oxidation resistance of SUS 439\"\n>\n  <p class=\"resistance-intro\">\n    SUS 439 combines approximately 17\u201319% chromium with a stabilized ferritic\n    structure. It generally provides better corrosion and oxidation resistance\n    than SUS 409L and is suitable for automotive exhaust systems, heat\n    exchangers, hot-water tanks, appliance components, and other fabricated\n    parts exposed to mild corrosion and repeated temperature changes.\n  <\/p>\n\n  <div class=\"resistance-grid\">\n    <article class=\"resistance-card\">\n      <h3>General Corrosion Resistance<\/h3>\n\n      <p>\n        Chromium forms a passive oxide layer that protects the underlying\n        metal in compatible atmospheric and aqueous environments. Titanium\n        stabilization helps preserve corrosion resistance around properly\n        fabricated welded areas.\n      <\/p>\n\n      <ul>\n        <li>Better general corrosion resistance than SUS 409L<\/li>\n        <li>Good performance in many indoor and mildly corrosive environments<\/li>\n        <li>Suitable for selected hot-water and condensate applications<\/li>\n        <li>Useful where improved staining resistance is required<\/li>\n      <\/ul>\n    <\/article>\n\n    <article class=\"resistance-card\">\n      <h3>Oxidation and Thermal-Cycling Resistance<\/h3>\n\n      <p>\n        SUS 439 provides useful resistance to oxidation and scaling in\n        compatible elevated-temperature environments. Its relatively low\n        thermal expansion helps reduce stress during repeated heating and\n        cooling.\n      <\/p>\n\n      <ul>\n        <li>Good resistance to repeated thermal cycling<\/li>\n        <li>Suitable for selected automotive exhaust components<\/li>\n        <li>Lower thermal expansion than austenitic stainless steels<\/li>\n        <li>Useful dimensional stability at changing temperatures<\/li>\n      <\/ul>\n    <\/article>\n\n    <article class=\"resistance-card\">\n      <h3>Commonly Suitable Environments<\/h3>\n\n      <p>\n        SUS 439 is frequently evaluated where moderate corrosion resistance,\n        welded fabrication, heat transfer, and thermal stability are required.\n      <\/p>\n\n      <ul>\n        <li>Automotive exhaust and condensate exposure<\/li>\n        <li>Hot-water tanks and compatible water systems<\/li>\n        <li>Heat-exchanger tubing and fabricated components<\/li>\n        <li>Kitchen and household appliance components<\/li>\n        <li>Burners, heat shields, and industrial thermal parts<\/li>\n      <\/ul>\n    <\/article>\n\n    <article class=\"resistance-card\">\n      <h3>Important Service Limitations<\/h3>\n\n      <p>\n        SUS 439 is not a substitute for higher-alloy stainless steel in every\n        environment. Suitability depends on chloride concentration, acidity,\n        temperature, drainage, surface condition, and required service life.\n      <\/p>\n\n      <ul>\n        <li>Continuous seawater or saltwater immersion<\/li>\n        <li>High-chloride or stagnant-water conditions<\/li>\n        <li>Hydrochloric acid and strong reducing acids<\/li>\n        <li>Highly corrosive chemical-processing environments<\/li>\n        <li>Poorly drained crevices and concentrated deposits<\/li>\n      <\/ul>\n    <\/article>\n\n    <article class=\"resistance-card\">\n      <h3>Maintaining Corrosion Resistance<\/h3>\n\n      <p>\n        Appropriate fabrication, cleaning, component design, and maintenance\n        help preserve the protective surface and extend service life.\n      <\/p>\n\n      <ul>\n        <li>Avoid contamination from carbon-steel tools and grinding dust<\/li>\n        <li>Control welding heat input and use suitable shielding<\/li>\n        <li>Remove weld residues and fabrication contamination<\/li>\n        <li>Prevent trapped moisture and stagnant condensate<\/li>\n        <li>Select cleaning chemicals compatible with ferritic stainless steel<\/li>\n      <\/ul>\n    <\/article>\n\n    <article class=\"resistance-card\">\n      <h3>Selecting the Correct Grade<\/h3>\n\n      <p>\n        When SUS 439 cannot provide sufficient resistance, another grade should\n        be evaluated according to the actual operating environment.\n      <\/p>\n\n      <ul>\n        <li>Consider SUS 304 for broader general corrosion resistance<\/li>\n        <li>Consider SUS 316L for improved chloride resistance<\/li>\n        <li>Consider duplex or higher-alloy grades for severe environments<\/li>\n        <li>Confirm suitability through testing when conditions are uncertain<\/li>\n      <\/ul>\n    <\/article>\n  <\/div>\n\n  <div class=\"resistance-note\">\n    <p>\n      <span class=\"highlight\">Selection note:<\/span>\n      Oxidation resistance at elevated temperature does not automatically\n      indicate resistance to aqueous corrosion, chlorides, or strong chemicals.\n      Confirm the actual temperature, exposure duration, gas composition,\n      condensate chemistry, fabrication condition, loading, and maintenance\n      requirements before specifying SUS 439. Final selection should follow the\n      governing standard and material test certificate.\n    <\/p>\n  <\/div>\n<\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-64a8c2a e-flex e-con-boxed e-con e-parent\" data-id=\"64a8c2a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f74b744 elementor-widget elementor-widget-heading\" data-id=\"f74b744\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SUS 439 Stainless Steel Applications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-be14f99 e-flex e-con-boxed e-con e-parent\" data-id=\"be14f99\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-3fba4a5 e-con-full e-flex e-con e-child\" data-id=\"3fba4a5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0efab20 elementor-widget elementor-widget-image\" data-id=\"0efab20\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1000\" height=\"1800\" src=\"https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/08\/sus-439-stainless-steel-applications-collage-1000x1800-1.jpg\" class=\"attachment-full size-full wp-image-1333\" alt=\"sus 439 stainless steel applications collage 1000x1800\" srcset=\"https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/08\/sus-439-stainless-steel-applications-collage-1000x1800-1.jpg 1000w, https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/08\/sus-439-stainless-steel-applications-collage-1000x1800-1-167x300.jpg 167w, https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/08\/sus-439-stainless-steel-applications-collage-1000x1800-1-569x1024.jpg 569w, https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/08\/sus-439-stainless-steel-applications-collage-1000x1800-1-768x1382.jpg 768w, https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/08\/sus-439-stainless-steel-applications-collage-1000x1800-1-853x1536.jpg 853w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-24b0bf3 e-con-full e-flex e-con e-child\" data-id=\"24b0bf3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-22045cd elementor-widget elementor-widget-text-editor\" data-id=\"22045cd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3 class=\"PDq2pG_selectionAnchorContainer\" data-section-id=\"1e5ghbp\" data-start=\"8559\" data-end=\"8589\">Automotive Exhaust Systems<\/h3><p data-start=\"8591\" data-end=\"8718\">Common applications include exhaust pipes, mufflers, resonators, catalytic-converter shells, manifolds, and related components.<\/p><h3 data-section-id=\"9deps4\" data-start=\"8720\" data-end=\"8739\">Heat Exchangers<\/h3><p data-start=\"8741\" data-end=\"8870\">Its thermal conductivity, corrosion resistance, and weldability support selected heat-exchanger tubing and fabricated components.<\/p><h3 data-section-id=\"11vzbda\" data-start=\"8872\" data-end=\"8891\">Hot-Water Tanks<\/h3><p data-start=\"8893\" data-end=\"9094\">Type 439 is used for selected welded hot-water tanks and tubing applications. ASTM specifically notes TP439 for hot-water tank service. <a class=\"decorated-link\" href=\"https:\/\/store.astm.org\/a0268_a0268m-10r16.html?utm_source=chatgpt.com\" target=\"_new\" rel=\"noopener nofollow\" data-start=\"9029\" data-end=\"9094\">ASTM A268\/A268M<\/a><\/p><h3 data-section-id=\"1s0llm6\" data-start=\"9096\" data-end=\"9132\">Kitchen and Household Appliances<\/h3><p data-start=\"9134\" data-end=\"9293\">Applications include appliance panels, oven components, burners, housings, and internal components exposed to compatible temperatures and corrosion conditions.<\/p><h3 data-section-id=\"1yjhwvm\" data-start=\"9295\" data-end=\"9324\">Commercial Food Equipment<\/h3><p data-start=\"9326\" data-end=\"9491\">SUS 439 may be used for equipment panels, cabinets, counters, tubing, and fabricated parts when its corrosion resistance meets the operating and cleaning conditions.<\/p><h3 data-section-id=\"1y4s2xi\" data-start=\"9493\" data-end=\"9526\">Industrial Thermal Components<\/h3><p data-start=\"9528\" data-end=\"9687\">Selected applications include burner parts, furnace components, exhaust ducts, enclosures, heat shields, and equipment exposed to repeated temperature changes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4dc3a139 e-flex e-con-boxed e-con e-parent\" data-id=\"4dc3a139\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3f86f7ac elementor-widget elementor-widget-text-editor\" data-id=\"3f86f7ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>faq<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-582feb4c elementor-widget elementor-widget-heading\" data-id=\"582feb4c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Stainless Steel SUS 439L Material FAQ<\/h2>\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-12b1c1ea e-con-full e-flex e-con e-child\" data-id=\"12b1c1ea\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-4f5fa873 e-con-full e-flex e-con e-child\" data-id=\"4f5fa873\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-700004c9 uael-faq-box-layout-yes align-at-left elementor-widget elementor-widget-uael-faq\" data-id=\"700004c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"uael-faq.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n\t\t\t<div id='uael-faq-wrapper-187' class=\"uael-faq-wrapper\">\n\t\t\t\t<div class=\"uael-faq-container uael-faq-layout-accordion\" data-layout=\"accordion\" >\n\t\t\t\t\t\t\t\t\t\t\t\t<div id=\"uael-accordion-5ffd51d\" class=\"uael-faq-accordion\" role=\"tablist\">\n\t\t\t\t\t\t\t\t<div class= \"uael-accordion-title\" aria-expanded=\"false\" role=\"tab\">\n\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon uael-accordion-icon-left\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-angle-up\" viewBox=\"0 0 320 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M177 159.7l136 136c9.4 9.4 9.4 24.6 0 33.9l-22.6 22.6c-9.4 9.4-24.6 9.4-33.9 0L160 255.9l-96.4 96.4c-9.4 9.4-24.6 9.4-33.9 0L7 329.7c-9.4-9.4-9.4-24.6 0-33.9l136-136c9.4-9.5 24.6-9.5 34-.1z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"uael-question-5ffd51d uael-question-span\" tabindex=\"0\" id=\"uael-faq-1-6a9ba47c858dd\">Is SUS 439 magnetic?<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"uael-accordion-content\" role=\"tabpanel\">\n\t\t\t\t\t\t\t\t\t<span>\n\t\t\t\t\t\t\t\t\t<span><p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"287\" data-end=\"504\">Yes. SUS 439 has a ferritic microstructure and is magnetic.<\/p><\/span>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div id=\"uael-accordion-38edfd4\" class=\"uael-faq-accordion\" role=\"tablist\">\n\t\t\t\t\t\t\t\t<div class= \"uael-accordion-title\" aria-expanded=\"false\" role=\"tab\">\n\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon uael-accordion-icon-left\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-angle-up\" viewBox=\"0 0 320 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M177 159.7l136 136c9.4 9.4 9.4 24.6 0 33.9l-22.6 22.6c-9.4 9.4-24.6 9.4-33.9 0L160 255.9l-96.4 96.4c-9.4 9.4-24.6 9.4-33.9 0L7 329.7c-9.4-9.4-9.4-24.6 0-33.9l136-136c9.4-9.5 24.6-9.5 34-.1z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"uael-question-38edfd4 uael-question-span\" tabindex=\"0\" id=\"uael-faq-2-6a9ba47c85953\">Is SUS 439 better than SUS 430?<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"uael-accordion-content\" role=\"tabpanel\">\n\t\t\t\t\t\t\t\t\t<span>\n\t\t\t\t\t\t\t\t\t<span><p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"287\" data-end=\"504\">It depends on the application. SUS 439 is generally better suited to welded components and thermal cycling, while SUS 430 is widely used for decorative and indoor appliance components.<\/p><\/span>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div id=\"uael-accordion-c8c0e0f\" class=\"uael-faq-accordion\" role=\"tablist\">\n\t\t\t\t\t\t\t\t<div class= \"uael-accordion-title\" aria-expanded=\"false\" role=\"tab\">\n\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon uael-accordion-icon-left\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-angle-up\" viewBox=\"0 0 320 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M177 159.7l136 136c9.4 9.4 9.4 24.6 0 33.9l-22.6 22.6c-9.4 9.4-24.6 9.4-33.9 0L160 255.9l-96.4 96.4c-9.4 9.4-24.6 9.4-33.9 0L7 329.7c-9.4-9.4-9.4-24.6 0-33.9l136-136c9.4-9.5 24.6-9.5 34-.1z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"uael-question-c8c0e0f uael-question-span\" tabindex=\"0\" id=\"uael-faq-3-6a9ba47c85984\">Is SUS 439 better than SUS 409L?<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"uael-accordion-content\" role=\"tabpanel\">\n\t\t\t\t\t\t\t\t\t<span>\n\t\t\t\t\t\t\t\t\t<span><p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"287\" data-end=\"504\">SUS 439 generally provides better corrosion and oxidation resistance because of its higher chromium content. SUS 409L may remain more economical for less demanding exhaust applications.<\/p><\/span>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div id=\"uael-accordion-0a97670\" class=\"uael-faq-accordion\" role=\"tablist\">\n\t\t\t\t\t\t\t\t<div class= \"uael-accordion-title\" aria-expanded=\"false\" role=\"tab\">\n\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon uael-accordion-icon-left\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-angle-up\" viewBox=\"0 0 320 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M177 159.7l136 136c9.4 9.4 9.4 24.6 0 33.9l-22.6 22.6c-9.4 9.4-24.6 9.4-33.9 0L160 255.9l-96.4 96.4c-9.4 9.4-24.6 9.4-33.9 0L7 329.7c-9.4-9.4-9.4-24.6 0-33.9l136-136c9.4-9.5 24.6-9.5 34-.1z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"uael-question-0a97670 uael-question-span\" tabindex=\"0\" id=\"uael-faq-4-6a9ba47c859ad\">Can SUS 439 replace SUS 304?<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"uael-accordion-content\" role=\"tabpanel\">\n\t\t\t\t\t\t\t\t\t<span>\n\t\t\t\t\t\t\t\t\t<span><p>Not automatically. SUS 304 generally provides better overall corrosion resistance and ductility. SUS 439 offers lower thermal expansion, useful thermal conductivity, magnetic behavior, and potentially lower alloy cost.<\/p><\/span>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div id=\"uael-accordion-a1e1a8c\" class=\"uael-faq-accordion\" role=\"tablist\">\n\t\t\t\t\t\t\t\t<div class= \"uael-accordion-title\" aria-expanded=\"false\" role=\"tab\">\n\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon uael-accordion-icon-left\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-angle-up\" viewBox=\"0 0 320 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M177 159.7l136 136c9.4 9.4 9.4 24.6 0 33.9l-22.6 22.6c-9.4 9.4-24.6 9.4-33.9 0L160 255.9l-96.4 96.4c-9.4 9.4-24.6 9.4-33.9 0L7 329.7c-9.4-9.4-9.4-24.6 0-33.9l136-136c9.4-9.5 24.6-9.5 34-.1z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"uael-question-a1e1a8c uael-question-span\" tabindex=\"0\" id=\"uael-faq-5-6a9ba47c859d6\">Is SUS 439 suitable for seawater?<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"uael-accordion-content\" role=\"tabpanel\">\n\t\t\t\t\t\t\t\t\t<span>\n\t\t\t\t\t\t\t\t\t<span><p>It is generally not recommended for continuous seawater immersion or severe chloride exposure. SUS 316L, duplex stainless steel, or a higher-alloy material may be required.<\/p><\/span>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div id=\"uael-accordion-a7574c5\" class=\"uael-faq-accordion\" role=\"tablist\">\n\t\t\t\t\t\t\t\t<div class= \"uael-accordion-title\" aria-expanded=\"false\" role=\"tab\">\n\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon uael-accordion-icon-left\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-angle-up\" viewBox=\"0 0 320 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M177 159.7l136 136c9.4 9.4 9.4 24.6 0 33.9l-22.6 22.6c-9.4 9.4-24.6 9.4-33.9 0L160 255.9l-96.4 96.4c-9.4 9.4-24.6 9.4-33.9 0L7 329.7c-9.4-9.4-9.4-24.6 0-33.9l136-136c9.4-9.5 24.6-9.5 34-.1z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"uael-question-a7574c5 uael-question-span\" tabindex=\"0\" id=\"uael-faq-6-6a9ba47c859fd\">What is the main use of SUS 439?<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"uael-accordion-content\" role=\"tabpanel\">\n\t\t\t\t\t\t\t\t\t<span>\n\t\t\t\t\t\t\t\t\t<span><p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"10976\" data-end=\"11135\">Major uses include automotive exhaust components, welded hot-water tanks, heat exchangers, appliance components, tubing, and thermally cycled fabricated parts.<\/p><p data-start=\"11137\" data-end=\"11631\" data-is-last-node=\"\" data-is-only-node=\"\">SUS 439 is officially characterized as a titanium-stabilized 17% chromium ferritic grade with improved corrosion resistance, formability, and weldability compared with unstabilized ferritic grades. Its ferritic structure also makes it magnetic and prevents hardening through conventional heat treatment. <a class=\"decorated-link\" href=\"https:\/\/www.outokumpu.com\/en\/products\/product-ranges\/moda\/moda-439-4510?utm_source=chatgpt.com\" target=\"_new\" rel=\"noopener nofollow\" data-start=\"11441\" data-end=\"11525\">Outokumpu<\/a>, <a class=\"decorated-link\" href=\"https:\/\/www.nipponsteel.com\/en\/product\/stainless\/nssc\/product\/grade\/nssc_series\/ferrite\/?utm_source=chatgpt.com\" target=\"_new\" rel=\"noopener nofollow\" data-start=\"11527\" data-end=\"11631\" data-is-last-node=\"\">Nippon Steel<\/a><\/p><\/span>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1dffeb0 e-flex e-con-boxed e-con e-parent\" data-id=\"1dffeb0\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-6959d5e e-con-full e-flex e-con e-child\" data-id=\"6959d5e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-309f708 elementor-widget elementor-widget-image\" data-id=\"309f708\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1000\" height=\"1000\" src=\"https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/07\/HL-Hairline.jpg\" class=\"attachment-large size-large wp-image-1016\" alt=\"hl hairline\" srcset=\"https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/07\/HL-Hairline.jpg 1000w, https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/07\/HL-Hairline-300x300.jpg 300w, https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/07\/HL-Hairline-150x150.jpg 150w, https:\/\/ghinox.opuspixelum.net\/wp-content\/uploads\/2026\/07\/HL-Hairline-768x768.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-16de1e9 e-con-full e-flex e-con e-child\" data-id=\"16de1e9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a283d10 elementor-widget elementor-widget-text-editor\" data-id=\"a283d10\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Take Action<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c487f0e elementor-widget elementor-widget-hfe-infocard\" data-id=\"c487f0e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"hfe-infocard.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n\t\t<div class=\"hfe-infocard\">\n\t\t\t\t\t\t\t\t\t<div class=\"hfe-infocard-title-wrap\">\n\t\t\t\t<h2 class=\"hfe-infocard-title elementor-inline-editing\" data-elementor-setting-key=\"infocard_title\" data-elementor-inline-editing-toolbar=\"basic\" >Looking for SUS 409L Stainless Steel Coil, Sheet, Strip, or Plate?<\/h2>\t\t\t<\/div>\n\t\t\t\t\t\t<div class=\"hfe-infocard-text-wrap\">\n\t\t\t\t<div class=\"hfe-infocard-text elementor-inline-editing\" data-elementor-setting-key=\"infocard_description\" data-elementor-inline-editing-toolbar=\"advanced\">\n\t\t\t\t\tGenn-Hann supplies stainless steel materials for precision processing, industrial fabrication, architectural components, appliances, electronics, automotive parts, and other demanding applications.\n\nTell us your required grade, thickness, width, surface finish, hardness, quantity, and end-use application. Our team can help review material availability and processing requirements.\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"hfe-button-wrapper elementor-widget-button\">\n\t\t\t\t<a href=\"https:\/\/ghinox.opuspixelum.net\/zh-hant\/%e8%81%af%e7%b5%a1\/\" class=\"elementor-button-link elementor-button elementor-size-sm\">\n\t\t\t\t\t<span class=\"elementor-button-text elementor-inline-editing\"  data-elementor-setting-key=\"infocard_button_text\" data-elementor-inline-editing-toolbar=\"none\">Get Started<\/span>\n\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>STAINLESS STEEL GRAD [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"enabled","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-10330","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/ghinox.opuspixelum.net\/zh-hant\/wp-json\/wp\/v2\/pages\/10330","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ghinox.opuspixelum.net\/zh-hant\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ghinox.opuspixelum.net\/zh-hant\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ghinox.opuspixelum.net\/zh-hant\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/ghinox.opuspixelum.net\/zh-hant\/wp-json\/wp\/v2\/comments?post=10330"}],"version-history":[{"count":2,"href":"https:\/\/ghinox.opuspixelum.net\/zh-hant\/wp-json\/wp\/v2\/pages\/10330\/revisions"}],"predecessor-version":[{"id":10374,"href":"https:\/\/ghinox.opuspixelum.net\/zh-hant\/wp-json\/wp\/v2\/pages\/10330\/revisions\/10374"}],"wp:attachment":[{"href":"https:\/\/ghinox.opuspixelum.net\/zh-hant\/wp-json\/wp\/v2\/media?parent=10330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}