What is the material of A672 B60 welded pipe
A672 B60 is a carbon steel grade under the ASTM A672/A672M standard, primarily used for electric fusion welded (EFW) or submerged arc welded (SAW) steel pipe for medium, high temperature, and high pressure industrial piping systems. The core characteristics are as follows:
1. Material Classification and Standards
Material type: Carbon steel, conforming to ASTM A515/A515M-17 Gr60 or Gr415 grade.
Corresponding standard: belongs to B60 grade of ASTM A672, and the suffix CL12, CL22 or CL32 indicates different heat treatment and manufacturing process categories.
2. Chemical composition
Carbon (C): ≤ 0.30% (specific content according to the wall thickness adjustment)
Manganese (Mn): ≤ 1.60%
Silicon (Si): 0.15% ~ 0.40%
Phosphorus (P), sulfur (S): ≤ 0.035%
3. Mechanical properties
Tensile strength: ≥415 MPa (corresponding to Gr60)
Yield strength: ≥240 MPa (typical)
Elongation: ≥18% (related to thickness)
4. Manufacturing process
Welding method: Electric Fusion Welding (EFW) or Double-sided Submerged Arc Welding (SAW), welds are subject to Radiographic (RT) or Ultrasonic Testing (UT).
Heat treatment: CL12 means normalised, CL22 and CL32 may involve normalising + tempering or more demanding processes.
5. Areas of application
Petrochemical and Power: For high pressure steam lines, oil/gas distribution systems and thermal/nuclear power plants.
Industrial Piping: Suitable for nominal diameters DN150 to DN1200 (6 to 48 inches), wall thicknesses from 6 to 30 mm.
Summary
A672 B60 is a medium to high-strength carbon steel with good weldability and pressure-carrying capacity, which is widely used in industrial piping systems under severe working conditions.
