Stainless Steel for Architecture & Decorative Applications

SUS 304 or 304L may be suitable for many urban and low-chloride exterior environments. SUS 316 or 316L is generally considered for coastal locations, swimming-pool areas, deicing-salt exposure and other chloride-containing environments.

Final selection must consider site exposure, surface finish, component geometry, fabrication details and planned cleaning frequency.

SUS 316L contains molybdenum, which improves resistance to localized pitting and crevice corrosion in many chloride-containing environments.

It may be preferred for coastal façades, exterior components exposed to road salt, humid industrial locations and selected pool environments. Grade selection still requires a project-specific exposure assessment.

Yes, for selected applications. SUS 430 is a ferritic stainless steel that can provide an attractive surface and economical material option for indoor wall panels, elevator components, trims, displays and decorative fixtures.

Its corrosion resistance is generally lower than that of SUS 304 or 316L, so it should not be substituted without reviewing the installation environment and project specification.

No.4 and hairline finishes are commonly selected for elevator interiors, entrance systems, wall panels, trims and decorative metalwork. BA and 2B may be used where a brighter or mill-finished appearance meets the design requirements.

The appropriate finish depends on appearance, location, handling, fabrication, cleaning and maintenance requirements.

A smoother, correctly produced surface can reduce sites where contaminants and moisture accumulate, supporting cleanability and corrosion performance.

However, polishing cannot make an unsuitable grade appropriate for a severe environment. Grade, finish quality, fabrication, installation detailing and maintenance must be considered together.

Directional finishes such as No.4 and hairline reflect light differently depending on grain orientation. Mixing polishing directions across adjacent panels can create an obvious visual mismatch.

Drawings and purchase specifications should define the grain direction, especially for façades, elevator doors, wall panels and adjoining decorative components.

Finish names alone may not fully define the visual result. Appearance can vary with abrasive type, grit sequence, polishing pressure, grain direction, material batch, forming and lighting.

An approved representative sample establishes a practical reference for color, reflectivity, texture and directional appearance before full production begins.

Yes. Differences in coil batch, polishing equipment, grain direction, protective film, fabrication and lighting can make neighboring panels appear different.

For visually continuous areas, material should be coordinated by batch where practical, processed to an approved finish reference and installed with a consistent grain orientation.

Tea staining is a brown surface discoloration associated with deposited salts, moisture, pollution and insufficient cleaning. It is more likely in coastal, sheltered or chloride-exposed locations where rain cannot regularly wash the surface.

Appropriate grade selection, smoother finishes, drainage, exposure to natural washing and scheduled cleaning can reduce the risk.

Yes. Stainless steel is corrosion resistant, not maintenance-free. Exterior and high-touch surfaces should be cleaned at intervals appropriate to the local environment and contamination level.

Coastal deposits, road salt, industrial pollution, fingerprints and cleaning residues should not be allowed to remain on the surface indefinitely.

Routine cleaning normally uses clean water with a mild detergent, followed by rinsing and drying. Directionally polished surfaces should be cleaned along the grain.

Abrasive carbon-steel tools, steel wool and chloride-containing cleaners should be avoided because they can scratch the finish, deposit free iron or increase corrosion risk. Cleaning products should first be tested on an inconspicuous area.

Yes. Contact with carbon-steel grinding dust, wire brushes, tools, storage racks or fabrication equipment can transfer free iron to the stainless steel surface.

The transferred iron can rust and create the appearance that the stainless steel itself is corroding. Separate tools, clean handling areas and suitable post-fabrication cleaning help prevent contamination.

Protective film helps reduce scratching, fingerprints and handling damage during cutting, forming, transportation and installation.

The film must be compatible with the processing method and should be removed within the supplier’s recommended period. Prolonged weather or heat exposure can make the film or adhesive difficult to remove.

Provide the grade, material form, thickness, width, length, surface finish, grain direction, flatness or dimensional tolerances, edge condition, protective-film requirement, quantity and delivery schedule.

The installation environment, downstream fabrication process, approved finish sample, packaging method and required certificates should also be identified.