ASTM/EN 10297 Certified 316L/S30400 Stainless Square Tube | Industrial-Grade Structural Pipes

High-Performance Stainless Steel Structural Tubing
ASTM-certified seamless square/rectangular tubing crafted from 304/316L stainless steel, engineered for demanding gas systems and construction frameworks with precision tolerances (±0.1%) and industrial-grade corrosion resistance.

​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
  • Pitting Resistance (PREN): 304L=19.5 | 316L=26.8

​Key Advantages

◆ ​Dual Manufacturing:

• ​Hot-Rolled: 3-120mm thickness (ASTM A312)
• ​Cold-Rolled: 0.5-3mm precision (±0.05mm flatness)
  ◆ ​Custom Fabrication:
  [✓] CNC Bending (180° ±1° accuracy)
  [✓] Laser Cutting (kerf width ≤0.2mm)
  [✓] ASME-Certified Welding
  ◆ ​Durability Certified:
• 1,500+ hrs salt spray resistance (ASTM B117)
• Temperature range: -40°C to 850°C

​Logistics & Value

• ​Packaging: Triple-layer seaworthy crates (60×40×40cm):
  1. VCI anti-corrosion paper
  2. 2mm PE waterproof coating
  3. Steel-reinforced wooden frame
• ​Delivery: 15-21 days (MOQ 1 ton, 5% bulk discount for 10+ tons)
• ​Compliance:
  • ASTM A312/A789 (Pressure Systems)
  • EN 10204 3.1 Material Traceability

​Applications

✔️ High-pressure gas distribution networks
✔️ Coastal bridge reinforcement frameworks
✔️ Chemical plant structural supports
✔️ Architectural seismic retrofitting