ASME SA213 TP321 Stainless Steel Seamless Heat Exchanger Tube
Grade TP321 is an austenitic stainless steel stabilized with titanium, offering excellent resistance to intergranular corrosion and oxidation. Its stability and mechanical properties make it suitable for high-temperature applications in various industries, such as aerospace, chemical processing, petrochemical, and power generation.
Chemical Composition:
| Grade | C | Mn | Si | P | S | Cr | Ni | Ti | Fe |
| TP321L | ≤ 0.08% | ≤2.00% | ≤0.75% | ≤ 0.045% | ≤0.030% | 17.00-19.00% | 9.00-12.00% | ≥ 5 x C | Balance |
Mechanical Properties:
| Grade | Ultimate Tensile Strength | Yield Strength
(0.2% Offset) | Elongation | Hardness |
| TP321L | 515 MPa (75,000 psi) minimum | 205 MPa (30,000 psi) minimum | 35% minimum in 50 mm | ≤ 95 HRB |
Key Features
High-Temperature Stability:
- The addition of titanium helps stabilize the steel, preventing carbide precipitation and thus maintaining corrosion resistance at high temperatures.
Corrosion Resistance:
- Excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800–1500°F (427–816°C).
Oxidation Resistance:
- Good oxidation resistance in intermittent service to 1600°F (870°C) and in continuous service to 1500°F (816°C).
Weldability:
- Good weldability with no risk of sensitization due to the stabilization by titanium.
Applications:
1. Aerospace Industry
- Aircraft Exhaust Systems: Used in exhaust systems and other high-temperature components due to their ability to withstand high temperatures and resist oxidation.
- Engines and Turbines: Suitable for components in jet engines and gas turbines where high strength and resistance to oxidation are crucial.
2. Chemical Processing Industry
- Heat Exchangers: Used in heat exchangers where hot corrosive fluids are processed, ensuring high performance and longevity.
- Reactors and Pressure Vessels: Suitable for reactors and pressure vessels dealing with high-temperature chemical reactions.
- Distillation Columns: Ideal for high-temperature distillation processes.
3. Petrochemical Industry
- Refinery Equipment: Used in catalytic crackers, reformers, and other refinery equipment that operate at high temperatures.
- Furnaces and Boilers: Suitable for components in furnaces and boilers where high-temperature stability is essential.
- Processing and Storage Tanks: Used in processing and storage tanks for high-temperature and corrosive liquids.
4. Power Generation
- Boiler Tubes: Commonly used in boiler tubes and superheater tubes due to their ability to withstand high pressure and temperature.
- Heat Recovery Systems: Ideal for heat recovery systems where efficient heat transfer and durability are required.
