ASTM A409 welded large diameter stainless steel pipes are premium industrial stainless steel pipes designed for high-strength, corrosion-resistant, and high-temperature applications. Manufactured from top-quality stainless steel grades such as 304, 316, and 321, these large diameter welded pipes meet ASTM A409/A409M standards and are ideal for oil & gas pipelines, chemical and petrochemical processing, power generation systems, marine and offshore platforms, and industrial infrastructure projects. Available in custom diameters, wall thicknesses, and lengths, these pipes offer superior weld integrity, precise dimensional accuracy, and long-term durability. Trusted by global B2B buyers, EPC contractors, and industrial pipeline suppliers, ASTM A409 welded stainless steel pipes ensure safe, reliable, and cost-effective performance for demanding applications.
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Products Description
Specifies multiple grades of austenitic stainless steel and their corresponding chemical composition requirements.
Common grades include 304, 304L, 316, 316L, etc.
The content range of various elements plays a crucial role in the properties of the ASTM A409 Welded Large Diameter Stainless Steel Pipe, such as corrosion resistance, strength, and processability.
For example, in grade 304, the carbon content is ≤0.08%, the chromium content is 18.00 - 20.00%, and the nickel content is 8.00 - 11.00%. In grade 304L, the carbon content is even lower, ≤0.035%, and the content of other elements also varies slightly. The lower carbon content reduces carbide precipitation during welding and improves resistance to intergranular corrosion, making it suitable for environments with high corrosion resistance requirements.
ASTM A409 Chemical Composition:
ASTM A409 Mechanical Property
The mechanical properties of ASTM A409 Type 316L ASTM A409/A409M metals determine the range of usefulness of a material and establish the service life that can be expected. Mechanical properties are also used to help classify and identify material.
| Yield Rp0.2(MPa) |
Tensile Rm(MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 366 (≥) | 579 (≥) | 21 | 12 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 334 |
ASTM A409 Type 316L ASTM A409/A409M Physical
The following lists give ASTM A409 Type 316L ASTM A409/A409M properties such as physical properties, density, thermal expansion.
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson's coefficient, ν |
|---|---|---|---|---|---|---|---|
| 42 | - | - | 0.21 | - | |||
| 153 | 486 | - | 43.3 | 233 | - | ||
| 277 | - | 13 | 24.2 | 242 | 141 |
ASTM A409 Type 316L ASTM A409/A409M Equivalent
| Grade | Standard | Area | Content |
|---|---|---|---|
| A409 S31254 | ASTM A409/A409M | America | Corrosion resistant or high temperature resistant large diameter welded austenitic stainless steel tube |
| A409 Type 317 | ASTM A409/A409M | America | Corrosion resistant or high temperature resistant large diameter welded austenitic stainless steel tube |
| A409 Type 310S | ASTM A409/A409M | America | Corrosion resistant or high temperature resistant large diameter welded austenitic stainless steel tube |
| A409S31700 | ASTM A409/A409M | America | Corrosion resistant or high temperature resistant large diameter welded austenitic stainless steel tube |
| A409 Type 348 | ASTM A409/A409M | America | Corrosion resistant or high temperature resistant large diameter welded austenitic stainless steel tube |
| A409 Type 347 | ASTM A409/A409M | America | Corrosion resistant or high temperature resistant large diameter welded austenitic stainless steel tube |
| A409 S30815 | ASTM A409/A409M | America | Corrosion resistant or high temperature resistant large diameter welded austenitic stainless steel tube |
| A409S20100 | ASTM A409/A409M | America | Corrosion resistant or high temperature resistant large diameter welded austenitic stainless steel tube |
| A409S31727 | ASTM A409/A409M | America | Corrosion resistant or high temperature resistant large diameter welded austenitic stainless steel tube |
| A409 S30940 | ASTM A409/A409M | America | Corrosion resistant or high temperature resistant large diameter welded austenitic stainless steel tube |
Features & Advantages
Large Diameter & High Strength: Suitable for industrial pipelines, high-pressure systems, and structural applications.
Corrosion & Heat Resistant: Excellent resistance to corrosion, oxidation, and high-temperature environments.
Welded Integrity: Precision welding ensures leak-free performance in large-diameter applications.
Versatile Fabrication: Can be cut, flanged, or customized for industrial and marine projects.
Standards Compliant: Fully meets ASTM A409/A409M specifications for chemical, petrochemical, and energy industries.
Products Applications
Oil & Gas Pipelines and Refineries
Chemical Processing & Storage Systems
Power Plants & Heat Exchangers
Marine & Offshore Platforms
High-Temperature Industrial Equipment
Large-Diameter Water and Steam Pipelines
Inspection & Quality Assurance
100% Hydrostatic Testing & Non-Destructive Testing (UT, RT)
Positive Material Identification (PMI) for grade verification
Dimensional and Surface Finish Inspection
Third-Party Inspection Available (SGS, BV, TUV, Intertek)
ISO 9001 Certified Manufacturing
FAQ ASTM A409 Welded Large Diameter Stainless Steel Pipe
What is ASTM A409 welded large diameter stainless steel pipe?
It is a high-strength, corrosion-resistant stainless steel pipe manufactured with welding, designed for large-diameter industrial pipelines in oil & gas, chemical, marine, and power applications.
Which grades are available for ASTM A409 pipes?
Common grades include 304, 316, and 321 stainless steel, suitable for high-temperature and corrosive environments.
What is the typical diameter range of ASTM A409 welded pipes?
Large diameter pipes typically range from 8" to 72" (DN200–DN1800), with custom diameters available.
Are ASTM A409 pipes seamless or welded?
These pipes are welded, which allows cost-effective production of large diameters while maintaining high structural integrity.
Can ASTM A409 welded pipes handle high pressure and temperature?
Yes, they are designed for high-pressure and high-temperature applications in petrochemical, power, and industrial systems.
What surface finishes are offered?
Standard finishes include pickled & passivated, 2B, BA, or polished, depending on the application requirements.
Is third-party inspection available?
Yes, inspections by SGS, BV, TUV, or Intertek can be arranged for chemical composition, dimensional accuracy, and weld quality.
Can ASTM A409 pipes be customized?
Yes, diameter, wall thickness, length, and end connections can be customized according to project requirements.
What industries commonly use ASTM A409 welded pipes?
Common industries include oil & gas, chemical processing, power generation, marine and offshore platforms, and high-temperature industrial plants.
How are large-diameter welded pipes packaged for export?
Pipes are bundled, anti-rust coated, and packed in wooden crates or steel frames to ensure safe international shipment.
What is the lead time for ASTM A409 welded large diameter pipes?
Lead time typically ranges from 4–8 weeks, depending on size, grade, quantity, and customization requirements.
Can ASTM A409 pipes be welded or fabricated on-site?
Yes, these pipes are suitable for welding, flanging, cutting, and on-site fabrication, following standard stainless steel welding procedures.
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