A213 TP347H Stainless Steel Seamless Boiler Tubes For Heat-Resistant Applications

A213 TP347H is a high-alloy austenitic stainless steel grade specifically developed for high-temperature and high-pressure applications, such as boilers, heat exchangers, and superheaters. It is a seamless tube manufactured according to the ASTM A213 standard, which specifies the requirements for ferritic and austenitic alloy steel tubes for heat-resistant applications. The addition of columbium (niobium) in the alloy enhances its high-temperature strength and resistance to sensitization, making it ideal for use in environments with extreme heat.

Key Features

• High-Temperature Resistance
  TP347H is designed to withstand prolonged exposure to high temperatures, up to 650°C (1202°F), without losing strength or stability. Its superior creep strength makes it suitable for pressure-containing applications in boilers and superheaters.

• Enhanced Corrosion Resistance
  The alloy contains chromium (18-20%) and nickel (9-13%), providing excellent resistance to oxidation and corrosion in both oxidizing and reducing environments. The addition of columbium helps resist intergranular corrosion, especially in high-temperature environments.

• Seamless Construction
  Manufactured as seamless tubes, A213 TP347H ensures uniformity, superior strength, and the ability to perform under high-pressure conditions without the risk of leakage.

• Good Weldability
  The material offers good weldability, allowing it to be joined to other components with minimal risk of cracking or defects during the welding process.

• Stabilized Composition
  The stabilization provided by columbium prevents carbide precipitation during welding or exposure to high temperatures, enhancing its mechanical properties.

Chemical Composition

Mechanical Properties

Applications

Due to its outstanding performance in high-temperature and corrosive environments, A213 TP347H stainless steel seamless boiler tubes are widely used in:

1. Power Generation

   • Boilers, reheaters, and superheaters in thermal power plants.

2. Petrochemical and Refining Industries

   • Heat exchangers and process equipment operating at elevated temperatures.

3. Chemical Processing

   • Components exposed to corrosive agents and high-temperature environments.

4. Furnace Tubes

   • Tubes used in high-temperature furnace systems and industrial heating equipment.

5. Nuclear Industry

   • Steam generators and heat exchangers in nuclear power plants.

Advantages

• Stability at High Temperatures: The alloy maintains its mechanical properties and resists creep deformation even at high operating temperatures.
• Excellent Oxidation Resistance: Performs well in oxidizing environments due to the chromium content.
• Improved Weldability: Suitable for both automatic and manual welding techniques.
• Long Service Life: High resistance to wear, corrosion, and thermal fatigue ensures extended operational life.
• Cost-Effective: Despite higher initial costs, the durability and reduced maintenance needs make it a cost-effective choice over time.