1/2-98 Inch ASTM A213 TP321 Stainless Steel Heat Exchanger Tube In Power Generation

ASTM A213 TP321 Stainless Steel Heat Exchanger Tube In Power Generation

ASTM A213 TP321 Stainless Steel Tube is an austenitic stainless steel that provides excellent high-temperature strength, corrosion resistance, and weldability, making it an ideal choice for heat exchangers, boilers, furnaces, and petrochemical processing equipment. The addition of titanium stabilizes the material, preventing intergranular corrosion and sensitization, making it particularly suitable for welding and high-temperature applications. TP321 is highly durable and resistant to thermal fatigue, oxidation, and crevice corrosion, making it a versatile material for demanding environments. Its ductility and formability allow it to be easily shaped, welded, and incorporated into complex systems.

Chemical Composition:

- Chromium (Cr): 17.0% - 19.0%

- Nickel (Ni): 9.0% - 12.0%

- Titanium (Ti): 5x(C + N)% min

- Manganese (Mn): 2.0% max

- Silicon (Si): 1.0% max

- Carbon (C): 0.08% max

- Phosphorus (P): 0.045% max

- Sulfur (S): 0.03% max

- Iron (Fe): Balance

Mechanical Properties:

- Tensile Strength: ~ 515 MPa (75,000 psi) (typical)

- Yield Strength: ~ 205 MPa (30,000 psi) (typical)

- Elongation: ~ 40% (in 50 mm gauge length)

- Hardness: ~ HRB 95 (typical)

Key Features

1.Corrosion Resistance:

TP321 offers excellent resistance to oxidation and corrosion in both oxidizing and reducing environments, particularly at high temperatures. The titanium content helps to prevent sensitization, which can lead to intergranular corrosion when stainless steel is exposed to certain environments at elevated temperatures.

2.High-Temperature Stability:

The addition of titanium makes TP321 particularly resistant to high-temperature corrosion, including crevice corrosion and stress corrosion cracking. It can withstand temperatures up to 870°C (1600°F), which makes it ideal for heat exchangers, furnaces, and other high-temperature industrial applications.

3.Weldability:

TP321 has excellent weldability due to its titanium stabilization, which prevents the formation of chromium carbide at grain boundaries during welding. This results in enhanced weld strength and resistance to intergranular corrosion.

4.Durability under Thermal Cycling:

TP321 maintains its strength and corrosion resistance even under conditions of frequent thermal cycling. This is especially useful in heat exchangers and boilers, where the material is subjected to temperature fluctuations over time.

5.Ductility and Formability:

TP321 is highly ductile, which means it can be easily formed, shaped, and welded into complex geometries. This characteristic is essential for applications like heat exchanger tube bundles and furnace components that require intricate fabrication.

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.