| Type: | High Frequency Welded(HFW) | Bare Pipe Material: | A312 TP347 |
|---|---|---|---|
| Product Name:TP347H HFW SOLID FIN TUBEBare Pipe Material:A312 TP347H Fin’s Material: | AISI SS304 | Size: | As Per Clients’ Drawing |
| Fin Pitch: | 2-14mm | Application: | Heat Exchanger |
| High Light: | heat exchanger Spiral Fin Tube， High Frequency Welded Spiral Fin Tube， A312 TP347 Spiral Fin Tube | ||
ASTM A312 TP347 Stainless Steel High Frequency Welded Spiral Fin Tube
ASME SA312 TP347H is approximately equivalent to 1Cr19Ni11Nb in China and belongs to high carbon niobium containing Cr Ni austenitic stainless steel. Due to the presence of stabilizing element Nb， it has good resistance to intergranular corrosion and multi sulfuric acid intergranular stress corrosion. In corrosive media such as acid， alkali， and salt， its corrosion resistance is similar to that of Ti containing 18-8 austenitic stainless steel. Therefore， it is widely used in industries such as boilers， power generation， petroleum， chemical， synthetic fibers， food， and paper. Due to Nb being less prone to burning than Ti， this steel grade can also be used as a welding core for welding chromium nickel austenitic stainless steel. This steel has higher high-temperature strength and better resistance to high-temperature oxidation than the 316 series， so it is often used as a high-strength steel.
The main components of TP347 stainless steel pipe are iron， chromium， nickel and other elements， with a chromium content of up to 22%， which has good corrosion resistance. In addition， the material also has good high-temperature creep strength and oxidation resistance， and can work stably for a long time in high-temperature and high-pressure environments. Compared with traditional carbon steel pipes， TP347 stainless steel pipes have a longer service life and higher safety.
Composition Analysis:
| ASTM A312 | Mn | Si | C | Ni | P | S | Cr | Mo | |
| TP347 | min. | – | – | – | 9 | – | – | 17 | 2 |
| max. | 2 | 1 | 0.08 | 13 | 0.045 | 0.03 | 20 | 3 | |
Mechanical Properties:
| Elongation min (% in 50mm) | 40 |
| Yield Strength 0.2% Proof min (MPa) | 205 |
| Tensile strength ( MPa )，min | 515 |
| Hardness Rockwell B (HR B) max | 95 |
TP347H Austenitic Stainless Hot Strength Steel Characteristics:
1.Good corrosion resistance performance
2.Excellent welding performance and thermal strength performance
ASTM A376 TP347/347H Equivalent Grade
| AISI/SAE | UNS No | GOST | Old British BS | Euronorm | Swedish SS | Japanese JIS | ||
| No | Name | |||||||
| 347 | S34700 | 08KH18N12B | 347S31 | 1.4550 | X6CrNiNb18-10 | 2338 | SUS 347 | |
| 347H | S34709 | 347S51 | 1.4961 | X8CrNiNb16-13 | SUS 347H | |||
TP347H stainless steel application areas:
Large boiler superheaters
reheaters
steam pipelines
heat exchanger
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.
Application of TP347 stainless steel pipe
Due to its excellent performance， TP347 stainless steel pipes are widely used in fields such as petroleum， chemical， and power. In the petroleum industry， TP347 stainless steel pipes are used to manufacture oil well pipelines， oil pipelines， etc. They can withstand extreme temperatures and pressures， effectively preventing corrosion of pipelines by crude oil. In the field of chemical engineering， this material is used to manufacture equipment such as reactors and heat exchangers， and can withstand the corrosion and high temperature of various chemical substances. In the field of electricity， TP347H stainless steel pipes are used to manufacture boiler pipelines， steam pipelines， etc. They can operate stably for a long time in high-temperature and high-pressure environments， ensuring the stability and safety of electricity production.
