Yuhong Group Co.,Ltd
| Payment Terms | L/C,T/T |
| Supply Ability | 1000 tons per month |
| Delivery Time | Depends on quantity |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap/Woven Case |
| Material Grade | ASTM A376 TP347H / ASME SA376 TP347H |
| Key Application | Superheater Tubes / Reformer Tubes / Boiler Systems |
| Processing Technology = | Cold-Drawn / Hot-Finished Seamless |
| Equivalent Standards | UNS S34709, EN 1.4912, DIN X8CrNiNb16-13 |
| NDT Testing | 100% UT (Ultrasonic) + Hydrostatic Test |
| Certification Compliance | ASTM A376, ASME SA376, ISO 15510, NACE MR0175 |
| Brand Name | YUHONG |
| Model Number | ASTM A376 TP347H |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C,T/T | Supply Ability | 1000 tons per month |
| Delivery Time | Depends on quantity | Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap/Woven Case |
| Material Grade | ASTM A376 TP347H / ASME SA376 TP347H | Key Application | Superheater Tubes / Reformer Tubes / Boiler Systems |
| Processing Technology = | Cold-Drawn / Hot-Finished Seamless | Equivalent Standards | UNS S34709, EN 1.4912, DIN X8CrNiNb16-13 |
| NDT Testing | 100% UT (Ultrasonic) + Hydrostatic Test | Certification Compliance | ASTM A376, ASME SA376, ISO 15510, NACE MR0175 |
| Brand Name | YUHONG | Model Number | ASTM A376 TP347H |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 | Place of Origin | CHINA |
| High Light | ASTM A376 TP347H seamless pipes ，high-temperature austenitic steel pipes ，duplex stainless steel pipe supplier | ||
ASTM A376 TP347H seamless pipes are high-temperature austenitic stainless steel tubes stabilized with niobium (Nb). Engineered for superior creep resistance and oxidation resistance up to 815°C (1,500°F), they withstand extreme thermal cycling and corrosive environments. Compliant with ASTM A376 standards, these pipes are solution-annealed for optimal microstructural stability, making them ideal for critical high-pressure applications.
The niobium-stabilized chemistry prevents chromium carbide precipitation, enhancing intergranular corrosion resistance.
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | 0.04 | 0.10 |
| Chromium (Cr) | 17.0 | 20.0 |
| Nickel (Ni) | 9.0 | 13.0 |
| Niobium (Nb) | 8×C min | 1.10 |
| Manganese (Mn) | - | 2.00 |
| Silicon (Si) | - | 0.75 |
| Phosphorus (P) | - | 0.045 |
| Sulfur (S) | - | 0.030 |
| Iron (Fe) | Balance | Balance |
Globally recognized cross-standard designations:
| Standard | Equivalent Grade |
|---|---|
| UNS | S34709 |
| EN | 1.4912 |
| DIN | X8CrNiNb16-13 |
| JIS | SUS 347H TB |
| GB | 0Cr18Ni11Nb |
Post-solution annealing properties per ASTM A376:
| Property | Value |
|---|---|
| Tensile Strength | ≥515 MPa (75 ksi) |
| Yield Strength (0.2%) | ≥205 MPa (30 ksi) |
| Elongation (%) | ≥35% (50mm gauge length) |
| Hardness (Max) | 192 HB / 90 HRB |
| Test Temperature | Room Temperature (20°C) |
Manufactured to ASTM A376/A999 specifications:
| Parameter | Tolerance |
|---|---|
| Outer Diameter (OD) | ±0.75% for OD ≤ 48.3mm; ±0.50% for OD > 48.3mm |
| Wall Thickness | +20% / -12.5% |
| Length | +6mm / -0mm (for lengths ≤6m) |
| Straightness | 0.0015 × length (mm) |
Designed for critical thermal and corrosive environments:
Why Choose Our TP347H Seamless Pipes?
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou... Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
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