Shaanxi Shangyou Stainless Steel Co., Ltd.
| Key Feature | Heat treated; OD to 12in; 18-20% Cr, 8-11% Ni; good corrosion resistance; hydro/NDE tested |
| Manufacturing Process | Flat-Rolled Stock → Forming → Automatic Welding (TIG/Plasma) → Heat Treatment → Sizing → Testing |
| UNS Number | UNS S30400 |
| Heat Treatment | Solution annealed at 1900°F (1040°C) minimum + rapid quench |
| Payment Terms | L/C,D/A,D/P,T/T,Western Union |
| Product Alias | Heat Exchanger Tube / Boiler Tube / Superheater Tube / Condenser Tube / 304 Welded Tube |
| Chemical Composition | Cr 18.0-20.0% / Ni 8.0-11.0% / C ≤0.08% / Mn ≤2.00% / Si ≤1.00% / P ≤0.045% / S ≤0.030% / Fe Balance |
| Supply Ability | Stock supply, regular production and custom manufacturing available. |
| Material Type | Austenitic Stainless Steel (Welded, Heat Treated) |
| Surface Finish | Pickled / Bright Annealed (BA) / Polished |
| Mechanical Properties | Tensile ≥515 MPa / Yield ≥205 MPa / Elongation ≥35% / Hardness ≤90 HRB |
| Packaging Details | Standard seaworthy export packing with bundles, waterproof wrapping, pallets or wooden cases. |
| Product Name | ASTM A249 TP304 Welded Austenitic Steel Tube |
| Delivery Time | 7-15 |
| Brand Name | Shangyou |
| Place of Origin | China |
| Certification | ISO9001 |
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Product Specification
| Key Feature | Heat treated; OD to 12in; 18-20% Cr, 8-11% Ni; good corrosion resistance; hydro/NDE tested | Manufacturing Process | Flat-Rolled Stock → Forming → Automatic Welding (TIG/Plasma) → Heat Treatment → Sizing → Testing |
| UNS Number | UNS S30400 | Heat Treatment | Solution annealed at 1900°F (1040°C) minimum + rapid quench |
| Payment Terms | L/C,D/A,D/P,T/T,Western Union | Product Alias | Heat Exchanger Tube / Boiler Tube / Superheater Tube / Condenser Tube / 304 Welded Tube |
| Chemical Composition | Cr 18.0-20.0% / Ni 8.0-11.0% / C ≤0.08% / Mn ≤2.00% / Si ≤1.00% / P ≤0.045% / S ≤0.030% / Fe Balance | Supply Ability | Stock supply, regular production and custom manufacturing available. |
| Material Type | Austenitic Stainless Steel (Welded, Heat Treated) | Surface Finish | Pickled / Bright Annealed (BA) / Polished |
| Mechanical Properties | Tensile ≥515 MPa / Yield ≥205 MPa / Elongation ≥35% / Hardness ≤90 HRB | Packaging Details | Standard seaworthy export packing with bundles, waterproof wrapping, pallets or wooden cases. |
| Product Name | ASTM A249 TP304 Welded Austenitic Steel Tube | Delivery Time | 7-15 |
| Brand Name | Shangyou | Place of Origin | China |
| Certification | ISO9001 |
Shaanxi Shangyou Stainless Steel Co., Ltd. supplies ASTM A249 TP304 welded austenitic steel tubes for global boiler manufacturers, power generation equipment fabricators, heat exchanger producers, and EPC contractors requiring reliable welded tubing for elevated-temperature and heat-transfer service. Produced to ASTM A249/A249M, this specification covers nominal-wall-thickness welded tubes and heavily cold worked welded tubes made from austenitic steels for boiler, superheater, heat exchanger, or condenser applications.
ASTM A249 is the standard specification for welded austenitic steel tubes intended for heat transfer service. TP304 (UNS S30400) is the most widely used austenitic stainless steel grade, containing 18.0-20.0% chromium and 8.0-11.0% nickel, offering excellent corrosion resistance and good mechanical properties. The tubing is manufactured from flat-rolled stock by an automatic welding process and is furnished in the heat-treated condition to ensure corrosion resistance and mechanical properties are fully restored. The specification covers sizes from 1/8 in. [3.2 mm] inside diameter to 12 in. [304.8 mm] outside diameter and wall thicknesses from 0.015 to 0.320 in. [0.4 to 8.1 mm].
| Dimension | Specification |
|---|---|
| Product Name | ASTM A249 TP304 Welded Austenitic Steel Tube |
| Product Alias | Heat Exchanger Tube / Boiler Tube / Superheater Tube / Condenser Tube / 304 Welded Tube |
| Material Type | Austenitic Stainless Steel (Welded, Heat Treated) |
| Key Feature | Heat treated; OD to 12in; 18-20% Cr, 8-11% Ni; good corrosion resistance; hydro/NDE tested |
| UNS Number | UNS S30400 |
| Chemical Composition | Cr 18.0-20.0% / Ni 8.0-11.0% / C ≤0.08% / Mn ≤2.00% / Si ≤1.00% / P ≤0.045% / S ≤0.030% / Fe Balance |
| Mechanical Properties | Tensile ≥515 MPa / Yield ≥205 MPa / Elongation ≥35% / Hardness ≤90 HRB |
| Heat Treatment | Solution annealed at 1900°F (1040°C) minimum + rapid quench |
| Manufacturing Process | Flat-Rolled Stock → Forming → Automatic Welding (TIG/Plasma) → Heat Treatment → Sizing → Testing |
| Surface Finish | Pickled / Bright Annealed (BA) / Polished |
| Primary Applications | Boilers / Superheaters / Heat Exchangers / Condensers / Power Generation / Chemical Processing |
| Parameter | Available Options |
|---|---|
| Product Standard | ASTM A249/A249M, ASME SA-249 |
| Grade Equivalent | TP304 (UNS S30400), SUS304 (JIS), 06Cr19Ni10 (GB), X5CrNi18-10 (EN) |
| Outside Diameter (OD) | 1/8 in. [3.2 mm] to 12 in. [304.8 mm] |
| Wall Thickness (WT) | 0.015 to 0.320 in. [0.4 to 8.1 mm] |
| Length | Up to 25m or cut-to-length |
| Delivery Condition | Annealed & Pickled / Bright Annealed |
| Heat Treatment | All material furnished in heat-treated condition |
| Inspection | Tension Test / Flattening Test / Flange Test / Reverse-Bend Test / Hardness Test / Hydrostatic or NDE Test / Grain Size Determination |
| Documents | MTC 3.1 / Inspection Reports / Packing List / Heat Number Traceability |
ASTM A249 TP304 welded tubes are specified for heat-transfer applications requiring corrosion resistance and mechanical integrity at moderate to elevated temperatures.
Typical applications include:
Key selection considerations: Select TP304 for general heat-transfer service with moderate chloride concentrations and good corrosion resistance requirements. The heat-treated condition is mandatory for all tubes under A249, ensuring optimal corrosion resistance and mechanical properties. TP304 offers short-term oxidation resistance up to 870°C and continuous operating performance up to 425°C. For sustained elevated-temperature service above 870°F where creep strength is required, consider TP304H (0.04-0.10% carbon) which is a modification intended specifically for superheater and reheater service. TP304L (low carbon, ≤0.035%) is recommended when welding with thicker sections where sensitization risk is a concern.
Shangyou Stainless Steel provides value-added processing including custom cutting, beveling, and end protection.
All tubes are packed with export-standard protection including protective end caps, steel strapping, waterproof wrapping, and wooden pallets or steel frames.
Quality documents include MTC 3.1, inspection reports, packing list, and heat number traceability. Third-party inspection (SGS, TUV, BV) can be arranged upon request.
1. What is ASTM A249?
ASTM A249 is the standard specification for welded austenitic steel tubes intended for boiler, superheater, heat exchanger, or condenser service.
2. What is the UNS number for TP304?
UNS S30400.
3. What is the chemical composition of TP304?
Cr 18.0-20.0%, Ni 8.0-11.0%, C ≤0.08%, Mn ≤2.00%, Si ≤1.00%, Fe Balance.
4. What mechanical properties does TP304 have?
Tensile ≥515 MPa, Yield ≥205 MPa, Elongation ≥35%, Hardness ≤90 HRB.
5. What size range does ASTM A249 cover?
1/8 in. [3.2 mm] inside diameter to 12 in. [304.8 mm] outside diameter, with wall thickness from 0.015 to 0.320 in. [0.4 to 8.1 mm].
6. Is ASTM A249 tube heat treated?
Yes, all material shall be furnished in the heat-treated condition.
7. What is the difference between TP304 and TP304H?
TP304 has max 0.08% carbon; TP304H has 0.04-0.10% carbon. H-grade is specifically for high-temperature service such as superheaters and reheaters.
8. What testing is required for ASTM A249?
Tension, flattening, flange, reverse-bend, hardness, hydrostatic or NDE testing, and grain size determination.
9. What is the maximum service temperature for TP304?
Short-term oxidation resistance up to 870°C; continuous operating performance up to 425°C.
10. What are typical applications for A249 TP304 tubes?
Boilers, heat exchangers, condensers, superheaters, power generation, and chemical processing.
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Shangyou Stainless Steel provides custom sizes, processing, and export solutions for global B2B customers.
Company Details
Business Type:
Manufacturer
Year Established:
2022
Total Annual:
>$10 million
Employee Number:
>100
Ecer Certification：
Verified Supplier
About Us Shaanxi Shangyou Stainless Steel Co., Ltd. is a professional stainless steel manufacturer and global supplier specializing in the production and export of stainless steel pipes, sheets, coils, strips, bars, wires, profiles, and nickel alloy products. Our Expertise With exte... About Us Shaanxi Shangyou Stainless Steel Co., Ltd. is a professional stainless steel manufacturer and global supplier specializing in the production and export of stainless steel pipes, sheets, coils, strips, bars, wires, profiles, and nickel alloy products. Our Expertise With exte...
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