ASME SA213 TP347H Chemical Composition
| Grade | UNS Designation | C | M | P | S | Si | Cr | Ni | Mo | N | Nb | Ti | Other |
| TP347H | S34709 | 0.04-0.10 | 2.00 | 0.045 | 0.03 | 1.00 | 17.0–19.0 | 9.0–13.0 | ... | ... | 8xC–1.10 | ... | ... |
Heat Exchanger Tube Application
1. Petrochemical industry
- Oil refinery: Heat exchangers, condensers and reboilers for atmospheric and vacuum units, catalytic cracking units, hydrofining units, etc.
- Chemical plant: Heat exchangers, condensers and reactors for the production of ethylene, propylene, styrene and other chemical products.
- LNG plant: Heat exchanger and cold box for LNG plant.
2. Electricity
- Thermal power plants: superheaters, reheaters and economizers for boilers.
- Nuclear power plant: For steam generators, condensers and feedwater heaters.
3. Other
- Solar energy: heat exchange tubes for solar collectors.
- Geothermal energy: heat exchange tubes for geothermal heat exchangers.
Heat Exchanger Tube Strength
1. Excellent high temperature resistance
- High temperature strength: Adding niobium element to enhance the high temperature strength, suitable for high temperature environment.
- Oxidation resistance: It has good oxidation resistance at high temperatures and prolongs service life.
2. Excellent corrosion resistance
- Intergranular corrosion resistance: Niobium effectively prevents intergranular corrosion and is suitable for corrosive media.
- Stress corrosion resistance: Good stress corrosion resistance in chloride-containing environments.
3. Good creep resistance
- Creep resistance: Excellent creep resistance at high temperature and pressure to ensure long-term stable operation.
4. Easy to process and weld
- Machinability: It has good plasticity and toughness, easy to process and form.
- Weldability: Good welding performance, can use a variety of welding methods.
