ASTM A213 TP444 Stainless Steel Seamless Tube For Power Generation

Product Specification

ASTM A213 TP444 Stainless Steel Seamless Tube For Power Generation

ASTM A213 TP444 Stainless Steel Seamless Tube is a ferritic stainless steel tube designed for high-temperature applications. It provides excellent resistance to oxidation, corrosion, and high temperatures. This makes it ideal for use in heat exchangers, boilers, chemical processing, petrochemical plants, power generation, and various other high-temperature environments. The tube is known for its durability, mechanical strength, and ability to maintain performance under extreme conditions. TP444 is an excellent choice when dealing with environments that require both heat resistance and corrosion protection.

1.The typical composition of TP444 is as follows:

-Chromium (Cr): 18.0% - 20.0%

-Nickel (Ni): 0.5% max

-Molybdenum (Mo): 1.0% - 2.0%

-Manganese (Mn): 1.0% max

-Silicon (Si): 1.0% max

-Carbon (C): 0.020% max

-Phosphorus (P): 0.020% max

-Sulfur (S): 0.010% max

-Iron (Fe): Balance

2.Physical Properties:

-Density: ~ 7.8 g/cm³

-Melting Point: ~ 1400°C (2552°F)

-Thermal Conductivity: ~ 24.6 W/m·K

-Specific Heat: ~ 460 J/kg·K

-Modulus of Elasticity: ~ 210 GPa

-Thermal Expansion: ~ 10.5 × 10^-6 /°C (at 20°C to 100°C)

3.Mechanical Properties:

-Tensile Strength: ~ 485 MPa (70,000 psi) (typical)

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

-Elongation: ~ 30%

-Hardness: ~ HRB 90 (typical)

Features of ASTM A213 TP444 Stainless Steel Seamless Tube:

1.High-Temperature Performance: TP444 is highly resistant to high-temperature oxidation and can withstand temperature fluctuations without losing its integrity. The material maintains its strength even under extreme heat.

2.Corrosion Resistance: With its high chromium and molybdenum content, TP444 provides superior resistance to corrosion in industrial environments, particularly in high-temperature environments that expose the material to oxidizing agents.

3.Seamless Design: Being a seamless tube, it provides superior structural integrity compared to welded tubes, reducing the risk of defects that could lead to tube failure under high pressures.

4.Excellent Weldability: TP444 is known for its excellent weldability, making it easy to fabricate and install in complex systems, such as heat exchangers or boiler systems.

5.Resistance to Stress Corrosion Cracking: This grade of stainless steel is particularly resistant to stress corrosion cracking, which is crucial in high-temperature and pressure environments.

Applications:

1.Heat Exchangers

Heat exchangers used in industries like chemical processing, petrochemical, and power generation rely on TP444 stainless steel seamless tubes. The material's resistance to high temperatures and corrosion makes it ideal for boilers, cooling systems, and heat recovery units.

2.Boilers and Steam Systems

TP444 tubes are widely used in boilers, particularly in the superheating and reheating sections where temperatures can rise above 500°C (932°F). The ferritic stainless steel construction resists oxidation and corrosion in these high-temperature, high-pressure environments.

3.Furnace and Chimney Components

The high-temperature resistance of TP444 makes it suitable for use in furnace tubes, heating coils, and other components exposed to intense heat. These tubes are used in industrial furnaces, incinerators, and waste heat recovery systems.

4.Automotive and Exhaust Systems

In automotive exhaust systems, TP444 can be used for exhaust gas recirculation (EGR) tubes, turbine parts, and exhaust manifold components due to its thermal stability and corrosion resistance to gases that can be highly corrosive at elevated temperatures.

5.Petrochemical and Chemical Industries

TP444 is often used in chemical reactors, distillation columns, and heat exchangers in petrochemical and chemical processing plants where resistance to both high temperatures and corrosive chemicals is necessary.

6.Power Generation

In the power generation industry, TP444 is frequently used in superheaters and reheaters of steam boilers, where efficient heat transfer and resistance to high-temperature oxidation are critical for maintaining system efficiency and longevity.

7.Nuclear Power Plants

Due to its excellent performance at high temperatures and in oxidative environments, TP444 is used in nuclear power plants for heat exchangers and cooling systems, where materials must maintain structural integrity in demanding conditions.

8. Offshore and Marine

Offshore platforms and marine environments often require materials that can withstand saltwater corrosion while also performing under high-temperature conditions. TP444's corrosion resistance to seawater and high-temperature durability make it a good choice for marine heat exchangers, desalination plants, and other offshore applications.

9.Food Processing and Dairy Industry

Food and dairy processing plants often use heat exchangers made with TP444 tubes due to the material's non-reactivity with food products and resistance to high-temperature cleaning and sterilization processes.