ASTM A249 TP309S Welded Stainless Steel Round Pipe
Specifications: 6mm~114.3mm
Length: 3500mm~7500mm (6000mm is the regular length)
Wall thickness: 0.80mm~3.05mm
Implementation standards: ASTM A249
ASTM A249 TP309S Welded Stainless Steel Round Pipe introduction
ASTM A249 TP309S welded pipe, containing 22Cr-12Ni, is resistant to high temperature oxidation at 980℃, and resists carburization and sulfidation. It is suitable for power station boilers, carburizing furnaces, and cracking units. It provides ASME certification and customized processing, and is available for quick delivery.
ASTM A249 TP309S Welded Stainless Steel Pipe
Advantages of ASTM A249 TP309S welded and drawn stainless steel tubing
ASTM A249 TP309S welded pipe high temperature strength: tensile strength retention rate ≥ 85% at 900℃, creep rupture time ＞ 5000 hours (ASME standard), suitable for high pressure and high temperature scenes such as power station boiler superheater and chemical cracking furnace;
ASTM A249 TP309S stainless steel pipe thermal shock resistance: austenite structure has strong stability, and its resistance to thermal stress cracking is 20% higher than that of ordinary stainless steel in drastic temperature fluctuations, ensuring long-term operation of equipment.
TP309S Stainless Steel Electric Resistance Welded Pipe Price
Each batch is provided with spectral analysis, intergranular corrosion, and water pressure test reports, and a 15-year service life warranty is promised (under normal working conditions). 100% radiographic testing (RT) / ultrasonic testing (UT) welds, 100% water pressure test (1.5 times the design pressure, up to 10MPa), 3.1B material certificate, ASME BPVC Section II certification, and intergranular corrosion and salt spray test reports are provided.
ASTM A249 TP 309S Stainless Steel Welded Tubes Specifications
Chemical Composition
| Element | Content |
|---|---|
| Carbon (C) | ≤0.08% |
| Chromium (Cr) | 22.0–24.0% |
| Nickel (Ni) | 12.0–15.0% |
| Manganese (Mn) | ≤2.00% |
| Silicon (Si) | ≤1.00% |
| Phosphorus (P) | ≤0.045% |
| Sulfur (S) | ≤0.030% |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥515 MPa (75 ksi) |
| Yield Strength (0.2% Offset) | ≥205 MPa (30 ksi) |
| Elongation | ≥35% (in 2" / 50 mm) |
| Rockwell Hardness | ≤HRB 90 |
| Impact Resistance | ≥20 J (15 ft·lb) at -20°C |
Welding & Processing
| Welding Method | Filler Material | Post-Weld Heat Treatment | Surface Finish |
|---|---|---|---|
| ERW (Electric Resistance Welding) | ER309 (22Cr-12Ni) | 1040–1100°C solution anneal | Pickled & passivated (Ra ≤1.6μm) |
| TIG (Tungsten Inert Gas) | ER309L (low-carbon) | Optional stabilization | Mirror polish (Ra ≤0.8μm) |
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