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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.
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