Yuhong Group Co.,Ltd
| Payment Terms | L/C,T/T |
| Supply Ability | |
| Delivery Time | 20-80DAYS |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Standard | ASTM A312 |
| Material | TP347H |
| Surface | Pickling Annealed |
| Packing | Ply-wooden Case Or Iron Case |
| Application | Chemical/Oil&Gas/Food Processing |
| Brand Name | YUHONG |
| Model Number | ASTM A312 TP347H |
| Certification | TUV API, PED, ISO |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C,T/T | Supply Ability | |
| Delivery Time | 20-80DAYS | Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Standard | ASTM A312 | Material | TP347H |
| Surface | Pickling Annealed | Packing | Ply-wooden Case Or Iron Case |
| Application | Chemical/Oil&Gas/Food Processing | Brand Name | YUHONG |
| Model Number | ASTM A312 TP347H | Certification | TUV API, PED, ISO |
| Place of Origin | CHINA | ||
| High Light | Boiler Stainless Steel Seamless Tube ，ASME SA312 Stainless Steel Seamless Tube ，Chemical Industry Stainless Steel Seamless Tube | ||
ASTM A312 TP347H Stainless Steel Seamless Pipe for High-Temperature Industry
ASTM A312 specification covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service. ASTM A312 TP347H (UNS S34709) is an austenitic stainless steel stabilized by adding niobium (Nb), commonly used in pipeline systems in high-temperature and corrosive environments.
The basic components of ASTM A312 TP347H stainless steel seamless pipes are mainly chromium (Cr) about 17-19%, nickel (Ni) about 9-13%, and carbon (C) ≤ 0.08%. The key lies in the addition of niobium (Nb) ≥ 10 × C%, which combines with carbon to form niobium carbide, reducing the precipitation of chromium carbide and avoiding intergranular corrosion.
ASTM A312 Stainless Steel Seamless Pipe Chemical Composition
| GRADE | UNS. | ASTM A312 CHEMICAL COMPOSITION % MAXIMUM | |||||||
|---|---|---|---|---|---|---|---|---|---|
| C | MN | P | S | SI | CR | NI | NB | ||
| TP347 | S34700 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-13.0 | 10 × C% |
| TP347H | S34709 | 0.04-0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 | 9.0-13.0 | 10 × C% |
Compared with other materials, the stabilization treatment of niobium in ASTM A312 TP347H stainless steel seamless pipe can prevent chromium carbide precipitation during welding or high temperature (450-850 ° C), protect grain boundaries, and enhance the resistance of pipes to intergranular corrosion; ASTM A312 TP347H stainless steel seamless pipes can maintain oxidation resistance and creep strength at high temperatures (≤ 800 ° C), which is superior to ordinary 304/316 stainless steel; TP347H stainless steel seamless pipes have good corrosion resistance to oxidizing media such as nitric acid and organic acids, but should be used with caution in reducing acids such as sulfuric acid and hydrochloric acid.
ASTM A312 TP347/TP347H Stainless Steel Seamless Pipe Mechanical Properties
| GRADE | HEAT TREATMENT | Tensile Strength, min ksi [MPa] | Yield Strength, min ksi [MPa] | |
|---|---|---|---|---|
| Cold Finished | Hot Finished | |||
| TP347 | 2000 °F [1100 °C] | 1925 °F [1050 °C] | 75 [515] | 30 [205] |
| TP347H | 2000 °F [1100 °C] | 1925 °F [1050 °C] | 75 [515] | 30 [205] |
ASTM A312 TP347H Stainless Steel Seamless Pipe Main Application
Power Plant Industry: Boiler superheaters and reheaters, main steam pipes, headers, and other heat exchange pipes.
Petrochemical Industry: Furnace tubes, reformer tubes, pyrolysis furnace tubes, etc., used for handling corrosive media at high temperatures.
Other High-temperature Processing Equipment: Components that need to withstand thermal cycling and high temperatures.
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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