ASTM A178 ERW steel pipe
ASTM A178 is a standard specification for electric resistance welded (ERW) steel pipe, commonly used in the manufacture of boilers, superheaters, and heat exchangers.
Material Classification:
Grade A: Low carbon steel, used for general applications.
Grade C: Medium carbon manganese steel, higher strength, suitable for environments requiring higher mechanical properties.
Chemical composition：
Grade A | Grade C | Grade D | |
C | ≤ 0.06% | ≤ 0.18% | ≤ 0.27% |
Mn | 0.27% - 0.63% | 0.27% - 0.93% | 0.29% - 1.06% |
P | ≤ 0.035% | ≤ 0.035% | ≤ 0.035% |
S | ≤ 0.035% | ≤ 0.035% | ≤ 0.035% |
Mechanical properties：
Mechanical properties | Grade A | Grade C | Grade D |
Tensile strength | ≥ 48,000 psi | ≥ 60,000 psi | ≥ 70,000 psi |
Yield strength | ≥ 28,000 psi | ≥ 37,000 psi | ≥ 40,000 psi |
Elongation | ≥ 35% | ≥ 30% | ≥ 30% |
Manufacturing process:
The steel pipe is manufactured by the electric resistance welding process, which can ensure uniform wall thickness and high weld quality, suitable for applications that need to withstand high pressure.
Specifications and Sizes:
ASTM A178 standard provides a variety of specifications and sizes to meet the needs of different engineering projects. The outer diameter of the pipe usually ranges from 1/2 inch to 5 inches, and the wall thickness ranges from 0.035 inches to 0.320 inches.
