Precision-Cut ASTM S30400 Stainless Square Tube | 316L/304L Seamless Pipes ±0.1% Tolerance

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

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

◆ Seamless Integrity: Eliminates weld corrosion risks in gas systems
◆ Dual Processing:

Hot-Rolled: 3-120mm thickness for load-bearing structures
Cold-Rolled: 0.5-3mm precision (±0.05mm flatness)
◆ Certified Durability:
1,500+ hrs salt spray resistance (ASTM B117)
Temperature range: -40°C to 850°C operational capacity

Processing Services

[✓] CNC Rotary Bending (180° precision)
[✓] Laser Micro-Cutting (±0.2mm kerf accuracy)
[✓] ASME IX-Certified Welding
[✓] Hydroforming for complex geometries

Logistics & Compliance

Packaging: Triple-layer seaworthy crates (60×40×40cm) with VCI paper + PE coating
Delivery: 15-21 days for custom orders (MOQ 1 ton)
Certifications:
- ASTM A312/A789 (Pressure Systems)
- NACE MR0175 (H₂S Environments)
- EN 10204 3.1 Material Traceability

Applications

✔️ High-pressure natural gas pipelines
✔️ Coastal bridge reinforcement systems
✔️ Chemical plant structural supports
✔️ Seismic-resistant building frameworks

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