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ASTM A376 TP304H Stainless Steel Seamless Pipe with Creep Resistance for High Temperature Service
| MOQ: | 5Ton |
| Price: | Based on grade, size, surface, processing, quantity and current raw material market price. |
| Standard Packaging: | Standard seaworthy export packing with bundles, waterproof wrapping, pallets or wooden cases. |
| Delivery Period: | 7-15 |
| Payment Method: | L/C,D/A,D/P,T/T,Western Union |
| Supply Capacity: | Stock supply, regular production and custom manufacturing available. |
Shaanxi Shangyou Stainless Steel Co., Ltd. supplies ASTM A376 TP304H stainless steel seamless pipe for global distributors, EPC contractors, power plant engineers and project procurement teams. Manufactured to ASTM A376/A376M standards, TP304H seamless pipe delivers enhanced creep resistance, oxidation resistance and long-term structural integrity for power generation, boiler systems, superheaters and reheaters.
ASTM A376 was originally developed for piping in central stations of electric-power generating thermal plants. TP304H is a modification of standard TP304 grade with controlled higher carbon content (0.04-0.10% vs 0.08% maximum for TP304), specifically intended for service at temperatures where creep and stress rupture properties are important. The higher carbon content provides improved high temperature strength through carbide precipitation strengthening during service. TP304H maintains excellent oxidation resistance up to approximately 800°C, with practical service temperature typically up to 650°C for long-term creep design. All pipe is furnished in the solution annealed condition with minimum solution treatment temperature of 1900°F [1040°C].
| Parameter | Available Specification |
|---|---|
| Product Standard | ASTM A376/A376M, ASME SA376 |
| UNS Designation | S30409 |
| Dimensional Standard | ASME B36.10, ASME B36.19 |
| OD Range | NPS 1/4" to NPS 30+ (10.3 mm to 762+ mm) |
| Wall Thickness | Schedules 5S to XXS (up to 100mm) |
| Length | Standard 6m or Customized |
| End Types | Plain End, Beveled End |
| Surface Finish | Pickled, Annealed |
| Heat Treatment | Solution Annealed (min 1900°F/1040°C) |
| Grain Size | Grade 7 or coarser |
| Inspection Tests | Hydrostatic, Eddy Current, Tension, Flattening |
| Documents | MTC 3.1, Inspection Reports, Packing List |
| Parameter | TP304H Specification |
|---|---|
| Carbon (C) | 0.04 – 0.10% |
| Chromium (Cr) | 18.0 – 20.0% |
| Nickel (Ni) | 8.0 – 11.0% |
| Manganese (Mn) | ≤ 2.00% |
| Silicon (Si) | ≤ 0.75 – 1.00% |
| Tensile Strength (min) | 515 MPa |
| Yield Strength (min) | 205 MPa |
| Elongation (min) | 40% |
ASTM A376 TP304H seamless pipe is specified for high temperature service conditions where standard TP304 lacks sufficient creep strength.
Typical applications include:
- Electric power generating thermal plants (boiler piping, superheaters, reheaters)
- High temperature heat exchangers
- Petrochemical furnace piping
- Steam distribution systems
- High temperature gas turbine piping
- Advanced Ultra Super Critical (AUSC) power plant boiler components (up to 650°C)
When selecting TP304H seamless pipe, buyers should consider:
Temperature and Creep Requirements: TP304H is specifically designed for temperatures where creep and stress rupture properties are critical, typically above 500°C up to 650°C for long-term service. The higher carbon content provides improved creep resistance through precipitation strengthening.
Oxidation Resistance: With 18-20% chromium content, TP304H provides excellent oxidation resistance up to approximately 800°C. For more extreme temperatures above 850°C, consider higher chromium grades such as TP309H or TP310H.
Grain Size Requirement: ASTM A376 requires TP304H to have a grain size of Grade 7 or coarser, which contributes to improved creep resistance at elevated temperatures.
Heat Treatment Conditions: If cold working is involved in processing, the minimum solution treatment temperature for TP304H shall be 1900°F [1040°C]. All pipe must be furnished in the heat-treated condition unless the order specifically states otherwise.
ASTM A376 TP304H seamless pipes are packed with export-standard protection including plastic wrapping, edge protection, steel strapping and wooden cases or steel frames. Packaging can be adjusted according to pipe size, weight and shipping requirements.
Quality documents may include MTC 3.1, inspection reports, packing lists and other agreed certificates. PMI/OES (XRF) can identify Cr, Ni, but cannot independently confirm L/H carbon level differences—refer to MTC for complete verification.
For quality evaluation, customers should provide heat number, package identification, inspection records and product photos. Technical solutions will be provided according to specifications and contract requirements.
ASTM A376 TP304H is a seamless austenitic stainless steel pipe with controlled higher carbon content (0.04-0.10%), specifically intended for high temperature service where creep and stress rupture properties are important.
TP304H has higher carbon content (0.04-0.10% vs 0.08% max for TP304), providing improved creep and stress rupture strength at elevated temperatures. TP304H also requires a grain size of Grade 7 or coarser.
TP304H is typically designed for service up to 650°C for long-term creep applications. It maintains good oxidation resistance up to approximately 800°C.
ASTM A376/A376M is the primary specification. ASME SA376 is also applicable. TP304H is also covered under ASTM A312/A312M for high-temperature and general corrosive service.
Yes. All pipe must be furnished in the solution annealed condition unless the order specifically states otherwise. Minimum solution treatment temperature is 1900°F [1040°C].
ASTM A376 requires TP304H to have a grain size of Grade 7 or coarser, as determined in accordance with Test Method E112.
Yes. TP304H is weldable using standard fusion welding methods. For high temperature applications, welding procedures should consider the higher carbon content and potential for carbide precipitation in the heat-affected zone.
Minimum tensile strength is 515 MPa, minimum yield strength is 205 MPa, and minimum elongation is 40%.
At 600°C, TP304H provides approximately 105 MPa at 0.2% creep strain for 100,000 hours. Creep strength varies with temperature and exposure time.
Typical documents include MTC 3.1, inspection reports, packing list, and heat number traceability for all material supplied.
Need ASTM A376 TP304H Stainless Steel Seamless Pipe for power generation, boiler systems or high temperature processing?
Send your requirements including grade, OD/wall thickness, schedule, length, temperature conditions and quantity. Shangyou Stainless Steel provides customized processing, third-party inspection and export solutions for global B2B customers.
