Marine Grade 316 316L Stainless Steel Square Tube For Coastal Saltwater Applications
Product Details
Marine Stainless Steel Square Tube
,316L Stainless Steel Square Tube
316 stainless steel square tube is a hollow structural section with four equal sides. Grade 316 contains molybdenum, which provides superior corrosion resistance against chlorides, salt water, and harsh chemicals.
Our 316 square tubes are ideal for marine, coastal, and chemical processing applications where standard 304 stainless steel may not perform adequately. Both welded and seamless options are available.
| Parameter | Details |
|---|---|
| Standard | ASTM A554, A312, A269, EN 10296, JIS G3446, GB/T 12770 |
| Grade | 316, 316L |
| Size (Width x Width) | 10 mm x 10 mm – 200 mm x 200 mm |
| Wall Thickness | 0.8 mm – 6.0 mm |
| Length | 3000 mm, 4000 mm, 6000 mm (custom cut available) |
| Process | Welded (ERW) or Seamless (Cold Drawn) |
| Surface Finish | Mill finish, Pickled, Polished (No.4, BA, Mirror), Brushed |
| Element | Grade 316 | Grade 316L |
|---|---|---|
| Carbon (C) | ≤ 0.08 | ≤ 0.03 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 |
| Chromium (Cr) | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 | 10.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 | 2.0 – 3.0 |
The addition of molybdenum (2.0–3.0%) provides superior resistance to pitting and crevice corrosion in chloride environments.
| Property | Grade 316 | Grade 316L |
|---|---|---|
| Tensile Strength | ≥ 515 MPa | ≥ 485 MPa |
| Yield Strength (0.2% offset) | ≥ 205 MPa | ≥ 170 MPa |
| Elongation | ≥ 35% | ≥ 35% |
| Hardness (Brinell) | ≤ 217 HB | ≤ 217 HB |
Note: The values above are for reference only. Please refer to the mill test certificate for actual data.
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Superior corrosion resistance in chloride and salt water environments
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Molybdenum addition resists pitting and crevice corrosion
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Excellent performance in marine and coastal conditions
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Good formability and weldability
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High strength-to-weight ratio
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Available in low carbon (316L) for welded structures
316 stainless steel square tube is specifically designed for harsh environments:
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Boat and ship railings
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Dock and marina structures
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Offshore platform handrails
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Yacht ladders and frames
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Seawall infrastructure
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Beachfront building frames
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Coastal handrails and guardrails
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Seaside restaurant furniture
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Oceanfront balcony railings
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Pier and boardwalk structures
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Chemical plant supports
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Pharmaceutical equipment frames
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Laboratory furniture
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Food processing in salt brine areas
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Pulp and paper mill structures
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Wastewater treatment plant frames
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Mining equipment supports
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Petrochemical structures
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Heat exchanger components
| Environment | Grade 304 | Grade 316 |
|---|---|---|
| Fresh water | Good | Excellent |
| Coastal / Splash zone | Moderate (may stain) | Excellent |
| Salt water immersion | Not recommended | Recommended |
| Chloride exposure | Poor | Good |
| Chemical exposure | Moderate | Excellent |
| Welded structures | Risk of corrosion | 316L preferred |
| Price | Lower | Higher |
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Application is near salt water or coastal areas
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Exposure to chlorides or de-icing salts
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Chemical processing environments
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Maximum corrosion resistance is required
For quotes, samples, or technical support, please reach out.
Mrs. Zhongcheng Metal
Manager
- Email: zhongcheng@metalsstainlesssteel.com
- Tel: 13309216881
- WhatsApp: 13309216881
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WeChat:
13363905196
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