Corrosion-Resistant 316L/304L Stainless Square Tube | ASTM S30401 Certified for Harsh Environments

Advanced Stainless Steel Structural Tubing
Seamless ASTM-certified square/rectangular tubing manufactured from 300-series alloys (Grades 304/316L), engineered for critical gas systems and construction frameworks with precision tolerances (±0.1%-0.3%).

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​Technical Specifications

• ​Material Composition:
  • 304L: Cr 18-20%, Ni 8-10.5%
  • 316L: Cr 16-18%, Ni 10-14%, Mo 2-3%
• ​Surface Quality: 120-grit polished finish (Ra ≤3.2μm)
• ​Mechanical Performance:
  • Yield Strength: 304L ≥170MPa | 316L ≥220MPa
  • PREN Value: 304L=19.5 | 316L=26.8

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​Key Features

◆ ​Dual Processing Options

• ​Hot-Rolled: 3-120mm thickness for structural integrity (ASTM A312)
• ​Cold-Rolled: 0.5-3mm precision (±0.05mm flatness) for architectural applications

◆ ​Certified Durability

• 1,500+ hours salt spray resistance (ASTM B117)
• Temperature range: -40°C to 850°C operational capacity

◆ ​Value-Added Services
[✓] CNC Rotary Bending (3D profiles)
[✓] Laser Micro-Cutting (±0.2mm accuracy)
[✓] ASME IX-Compliant Welding

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​Logistics & Compliance

• ​Packaging: Triple-layer seaworthy crates (60×40×40cm)
  • Layer 1: VCI anti-corrosion paper
  • Layer 2: 2mm PE waterproof coating
  • Layer 3: Steel-braced wooden frame
• ​Delivery: 15-21 days for custom lengths (MOQ 1 ton)
• ​Standards:
  • ASTM A312/A789 (Pressure Systems)
  • NACE MR0175 (H₂S Environments)
  • EN 10204 3.1 Certification

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​Industrial Applications

✔️ High-pressure natural gas pipelines
✔️ Coastal bridge reinforcement frameworks
✔️ Chemical plant structural supports
✔️ High-rise building seismic retrofitting