2026-09-29
When selecting a turnstile, buyers often focus on the gate type, access credentials and appearance. The stainless steel grade deserves the same attention. Choosing the right material for the cabinet and exposed components can help preserve the finish and reduce maintenance over time.
Both 304 and 316 are widely used stainless steel grades. The main distinction for turnstile applications is that 316 contains molybdenum, which improves resistance to corrosion in chloride containing environments, including those exposed to sea salt. This does not make 316 completely corrosion proof. Surface finish, fabrication quality, cleaning and local conditions also affect
| Consideration | 304 stainless steel | 316 stainless steel |
| Typical fit | Indoor and less aggressive outdoor environments | Coastal, salt exposed and more demanding outdoor environments |
| Chloride resistance | Lower | Higher |
| Initial material cost | Generally lower | Generally higher |
| Maintenance | Cleaning is still required | Cleaning is still required |
For an indoor office lobby, school library, corporate entrance or other sheltered location, 304 is often a sensible specification. It provides the appearance expected of a stainless steel turnstile without automatically specifying the higher grade for an environment that may not need it. Material producer Outokumpu identifies 304 as suitable for interior and lighter urban atmospheric exposure. Outokumpu
For outdoor use, assess the site rather than relying on the word “outdoor” alone. A sheltered entrance far from salt exposure presents different conditions from an uncovered entrance beside the sea.
Consider 316 when a turnstile will be installed near the coast or exposed to salt laden air, sea spray or deicing salt. Salt deposits can collect on exposed surfaces and contribute to discoloration or localized corrosion. The Australian Stainless Steel Development Association recommends 316 or a grade with equivalent corrosion resistance for marine environments, while also emphasizing surface finish and ongoing cleaning. assda.asn.au
316 may also be appropriate where the entrance is difficult to clean regularly or where maintaining a clean appearance is particularly important. For especially severe exposure, a material specialist should assess the site; specifying 316 alone is not a guarantee against corrosion. assda.asn.au
Two turnstiles described as “316 stainless steel” may still differ in construction. Before ordering, confirm:
A material choice also does not replace a proper outdoor design. If the gate is exposed to rain, discuss water management and protection of electrical components separately from the stainless steel grade.
For most sheltered indoor projects, start by evaluating 304. For coastal sites or entrances with meaningful salt exposure, evaluate 316 and the complete surface finish and maintenance plan. If the conditions are unusually severe, request a site specific material assessment before finalizing the specification.
VELAXIZ can help you review the installation location, turnstile configuration and exposed components so the material specification matches the project requirements. Send us your site details to discuss a suitable turnstile configuration.
No. “Outdoor” covers a wide range of environments. Salt exposure, shelter, local pollution, cleaning arrangements and appearance requirements should guide the decision. Outokumpu
No. 316 has better resistance to chloride related corrosion than 304, but salt deposits and inadequate cleaning can still cause visible corrosion in severe coastal conditions. assda.asn.au
It may develop visible staining in marine environments. For a coastal project, 316 or a grade with equivalent corrosion resistance is generally the safer starting point, followed by an assessment of the exact exposure and maintenance requirements.
