Products Description
ASTM A409 Welded Stainless Steel Pipe
Advantages of ASTM A409 Welded Stainless Steel Pipe
- Large Sizes: Compared to other welded pipes, ASTM A409 covers welded stainless steel pipes up to 48 inches (1219 mm) in diameter, making it ideal for large industrial piping systems where seamless pipe is impractical or cost-prohibitive.
- Corrosion Resistance: ASTM A409 pipe is manufactured from austenitic stainless steel grades (304, 304L, 316L, 321, 347) that offer excellent resistance to oxidation, scaling, and corrosion in chemical, petrochemical, marine, and high-temperature environments.
- Weld Integrity: The pipe is produced using an automated welding process without filler metal, followed by solution annealing, resulting in a smooth, uniform bore and strong, defect-free welds.
applications of ASTM A409 Welded Stainless Steel Pipe
- Heat Transfer Systems: Heat exchanger piping and condenser lines, HVAC and industrial cooling system piping, etc.
- Buildings and Infrastructure: Structural support piping for large buildings, bridges, and industrial complexes, as well as water treatment and distribution piping, etc.
- Oil and Gas Industry: Piping for natural gas processing plants and liquefied natural gas terminals, offshore risers, and subsea pipeline applications, etc.
- Power Generation: Cooling water, condenser and heat exchanger piping, and high-temperature and high-pressure boiler and turbine piping systems
- Chemical and Petrochemical Industry: Process piping for chemical plants and refineries, etc.
Chemical Composition
| Grade | C (max) | Cr (%) | Ni (%) | Mo (%) | Ti / Nb (%) | Others |
| TP304 | 0.08 | 18.0–20.0 | 8.0–11.0 | - | - | - |
| TP304L | 0.035 | 18.0–20.0 | 8.0–12.0 | - | - | - |
| TP316 | 0.08 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | - | - |
| TP316L | 0.035 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | - | - |
| TP321 | 0.08 | 17.0–19.0 | 9.0–12.0 | - | Ti ≥5×C | - |
| TP347 | 0.08 | 17.0–19.0 | 9.0–13.0 | - | Nb + Ta | - |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| TP304 | ≥515 | ≥205 | ≥35 | ≤217 |
| TP304L | ≥485 | ≥170 | ≥35 | ≤217 |
| TP316 | ≥515 | ≥205 | ≥35 | ≤217 |
| TP316L | ≥485 | ≥170 | ≥35 | ≤217 |
| TP321 | ≥515 | ≥205 | ≥35 | ≤217 |
| TP347 | ≥515 | ≥205 | ≥35 | ≤217 |
Possible Alternative Grades
- EN Standards: EN 10217-7 1.4301, 1.4307, 1.4404, 1.4541, 1.4550
- AISI: 304, 304L, 316, 316L, 321, 347
- JIS: SUS304, SUS304L, SUS316, SUS316L, SUS321, SUS347
- GB / Chinese: 06Cr19Ni10, 00Cr19Ni10, 06Cr17Ni12Mo2, 00Cr17Ni14Mo2, 06Cr18Ni11Ti
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