Yuhong Group Co.,Ltd
| Delivery Time | 20-80 |
| Specification | ASTM A376/ASME SA376 TP347H Stainless Steel Seamless Tube |
| Payment Terms | L/C, T/T |
| Package | wooden boxes package |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Surface treatment | Annealed, polished etc. |
| Shape | Round |
| Technique | Cold Drawn/ Cold Rolled |
| Model Number | ASTM A376/ASME SA376 TP347H |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008. |
| Brand Name | YUHONG SPECIAL STEEL |
| Place of Origin | CHINA |
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Product Specification
| Delivery Time | 20-80 | Specification | ASTM A376/ASME SA376 TP347H Stainless Steel Seamless Tube |
| Payment Terms | L/C, T/T | Package | wooden boxes package |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap | Surface treatment | Annealed, polished etc. |
| Shape | Round | Technique | Cold Drawn/ Cold Rolled |
| Model Number | ASTM A376/ASME SA376 TP347H | Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008. |
| Brand Name | YUHONG SPECIAL STEEL | Place of Origin | CHINA |
| High Light | ASTM A376 TP347H seamless tube ，Nb-stabilized stainless steel tube ，high-temperature superheater reheater tube | ||
ASTM A376 TP347H Seamless Tube Nb-Stabilized 515MPa Up to 900°C for Superheater Reheater Cracking Furnace
| 347 vs 347H Comparison: | ||||
| Grade | UNS | C (%) | Grain Size | Primary Application |
| TP347 | S34700 | ≤0.08 | Finer | General service, moderate temperatures |
| TP347H | S34709 | 0.04–0.10 | ASTM No. 7 or coarser | High‑temperature creep service (>550°C) |
| Chemical Composition | ||||
| Element | Min (%) | Max (%) | Function Description | Standard Reference |
| C (Carbon) | 0.04 | 0.1 | Elevated carbon for coarse grain & creep strength | ASTM A376 |
| Mn (Manganese) | — | 2 | Deoxidation, hot workability | ASTM A376 |
| P (Phosphorus) | — | 0.045 | Cold brittleness control | ASTM A376 |
| S (Sulfur) | — | 0.03 | Hot brittleness control | ASTM A376 |
| Si (Silicon) | — | 1 | Oxidation resistance | ASTM A376 |
| Cr (Chromium) | 17 | 19 | Oxidation resistance & high‑temperature strength | ASTM A376 |
| Ni (Nickel) | 9 | 13 | Austenite structure stabilization | ASTM A376 |
| Nb (Niobium) + Ta (Tantalum) | 8×C | 1 | Stabilization – prevents sensitization | ASTM A376 |
| Mechanical Properties | ||
| Parameter | Requirement | Standard Reference |
| Tensile Strength (Rm) | ≥ 515 MPa (75 ksi) | ASTM A376 |
| Yield Strength (Rp0.2) | ≥ 205 MPa (30 ksi) | ASTM A376 |
| Elongation (longitudinal, 50mm gage length) | ≥ 35% | ASTM A376 |
| Hardness (Brinell) | ≤ 223 HB | ASTM A376 |
| Hardness (Rockwell B) | ≤ 95 HRB | ASTM A376 |
| Physical Properties | |||
| Parameter | Value | Unit | Standard Reference |
| Density | 7.7 – 8.03 | g/cm³ | ASTM A376 |
| Elastic Modulus (20°C) | ~195 | GPa | ASTM A376 |
| Thermal Conductivity | ~14.5 | W/(m·K) | ASTM A376 |
| Coefficient of Linear Expansion (20–300°C) | ~17.0 | ×10⁻⁶/°C | ASTM A376 |
| Specific Heat Capacity (20°C) | ~500 | J/(kg·K) | ASTM A376 |
| Electrical Resistivity | ~0.73 | μΩ·m | ASTM A376 |
| Melting Range | 1400 – 1425 | °C | ASTM A376 |
Application:
Power Generation (core application): Superheaters and reheaters for supercritical and ultra‑supercritical power plant boilers; main steam piping; high‑temperature reheat piping
Petrochemical Industry: Ethylene cracking furnace tubes; hydrogen conversion furnace tubes; refinery furnaces; high‑temperature piping systems
Nuclear Industry: Non‑nuclear‑grade auxiliary piping systems within nuclear power plants requiring high‑temperature performance
Industrial Heating: Heat treatment equipment, expansion joints, aircraft exhaust manifolds
Heat Exchangers: High‑temperature thermal fluid piping and heat exchanger tube bundles exposed to cyclic thermal stress
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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