ASTM A376 TP347H S34709 Stainless Steel High Frequency Welded Spiral Fin Tube
ASTM A376 TP347H S34709 Stainless Steel High Frequency Welded Spiral Fin Tube
TP347H High carbon niobium containing Cr-Ni austenitic stainless steel
TP347H (1Cr19Ni11Nb) is a high carbon niobium containing Cr-Ni austenitic stainless steel, due to the stabilization element Nb, its intergranular corrosion resistance and polysulfuric acid intergranular stress corrosion resistance is good, in acid, alkali, salt and other corrosive media, its corrosion resistance is similar to the 18-8 austenitic stainless steel containing Ti. Therefore, it is widely used in boiler, power generation, petroleum, chemical industry, synthetic fiber, food, paper and other industries. Heat exchangers for large boiler superheater tubes, reheater tubes, steam pipes and petrochemical industries.
TP347H (1Cr19Ni11Nb) is a high carbon niobium containing Cr-Ni austenitic stainless steel, due to the stabilization element Nb, its intergranular corrosion resistance and polysulfuric acid intergranular stress corrosion resistance is good, in acid, alkali, salt and other corrosive media, its corrosion resistance is similar to the 18-8 austenitic stainless steel containing Ti. Therefore, it is widely used in boiler, power generation, petroleum, chemical industry, synthetic fiber, food, paper and other industries. Because Nb is less prone to burn than Ti, this steel can also be used as the welding core of chromium-nickel austenitic stainless steel. This steel has higher high temperature strength and better resistance to high temperature oxidation than 316 series, so it is often used as heat strength steel.
ASTM A376 TP347H Stainless Steel Seamless Pipe Specification
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ASTM A376 |
Standard Specification for Seamless Austenitic Steel Pipe for High-Temperature Service |
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| Material Grade | TP304 | S30400 | TP304H | S30409 | TP304N |
| TP316LN | S31653 | TP321 | S32100 | TP321H | |
| S31725 | S31726 | S34565 | S32109 | TP347 | |
| S30451 | TP304LN | S30453 | TP316 | S31600 | |
| TP316H | S31609 | TP316N | S31651 | S34700 | |
| TP347H | S34709 | TP348 | S34800 | 16-8-2H | |
| S16800 | |||||
| Size | 1/2''~48'' | ||||
| Thickness | SCH5~SCHXXS | ||||
| End | Beveled End,Plain End | ||||
| Length | Single Random, Double Random & Cut Length | ||||
| Packing | Export Standard packing or as per your requirements. | ||||
Equivalent Grades of Stainless Steel 347/347H Seamless Pipe
| Stainless Steel | Tradename | UNS no. | Werkstoff No. |
| 347 | 347 Stainless | S34700 | 1.4550 |
| 347H | 347H Stainless | S34709 | 1.4961 |
ASTM A376 TP347H Stainless Steel Seamless Pipe Chemical Composition
| C |
Mn max. |
P max. |
S max. |
Si max. |
Ni | Cr | Mo | Ti | Nb | Ta | Ni | Other |
| 0.04-0.10 | 2.00 | 0.045 | 0.03 | 0.75 | 9.0-13.0 | 17.0-19.0 | ... | ... | 8×C-1.10 | ... | ... | ... |
Mechanical properties of TP347 stainless steel (S34700):
*Tensile strength ≥ 515Mpa
*Yield strength ≥ 205Mpa
*Elongation rate ≥ 35%
TP347H Austenitic Stainless Hot Strength Steel Characteristics:
*Good corrosion resistance performance
*Excellent welding performance and thermal strength performance
TP347H stainless steel application areas:
*Large boiler superheaters, reheaters, steam pipelines, and heat exchanger fittings for petrochemical industry.
Basic characteristics of TP347H stainless steel pipe:
1. It has high high-temperature strength and high-temperature plasticity.
2. It has excellent soothing reactivity and corrosion resistance.
3. Have good preparation stability.
4. Uniform chemical composition.
5. It has good processing and welding performance.
6. High dimensional accuracy and surface quality.
Applications:
Heat exchangers for large boiler superheater tubes
Reheater tubes
Steam pipes and petrochemical industries
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