ASTM A334 GR.6 Boiler Tube Carbon And Alloy Steel For Low Temperature Service

ASTM A334 GR.6 Boiler Tube Carbon and Alloy Steel for Low Temperature Service

ASTM A334 Grade 6 (A334 Gr. 6) is a specification for seamless and welded carbon and alloy steel pipe for low-temperature service. Specifically, this grade is used for the construction of boiler tubes, heat exchangers, condensers, and similar applications, where resistance to low temperatures is crucial.

Key Characteristics of ASTM A334 Gr. 6:

• Material Composition: A334 Gr. 6 primarily consists of carbon steel with small additions of manganese and other alloying elements. The steel is designed for use in low-temperature environments, which makes it resistant to brittle fracture under those conditions.

• Temperature Range: This material is designed to perform well at temperatures as low as -50°F (-46°C), with specific mechanical properties maintained at low temperatures.

• Mechanical Properties:

  • Yield Strength: Minimum yield strength is typically around 30,000 psi (205 MPa).
  • Tensile Strength: The tensile strength typically ranges from 50,000 psi (345 MPa) to 70,000 psi (485 MPa).
  • Elongation: Typically, A334 Gr. 6 must have a minimum elongation of 30% in 8 inches (200mm).

• Applications: This material is used in the construction of heat exchangers, condensers, and other heat transfer systems for applications in chemical, petrochemical, and energy industries, as well as other sectors requiring low-temperature service.

• Welding and Fabrication: A334 Gr. 6 is typically welded using methods that are compatible with carbon and low-alloy steels. Post-weld heat treatment may be required, depending on the application and specific conditions.

Chemical Requirements for ASTM A334 Grade 6 Tubes

Tensile Requirements for ASTM A334 Grade 6 Tubes