Seamless Steel Tube Library: ASTM A178-C Seamless Steel Tube Chemical Composition and Mechanical Properties
Hit：142026-06-01 08:05:20
Seamless Steel Tube Library: ASTM A178-C Seamless Steel Tube Chemical Composition and Mechanical Properties
The chemical composition and mechanical properties of seamless steel pipe A178C (ASTM A178 Grade C) are summarized as follows:
1、 Chemical composition
According to ASTM standards, the chemical composition of A178C carbon steel material is limited to:
table
Element content requirements (weight percentage)
C (carbon) ≤ 0.30%
Si (silicon) ≥ 0.10%
Mn (manganese) 0.29% -1.06%
P (phosphorus) ≤ 0.035%
S (sulfur) ≤ 0.035%
Cr (chromium) ≤ 0.40%
Ni (nickel) ≤ 0.40%
Cu (copper) ≤ 0.40%
Mo (molybdenum) ≤ 0.15%
2、 Mechanical performance
The minimum mechanical performance requirements for ASTM A178C are:
Minimum requirement for performance indicators
Tensile strength 415MPa (60ksi)
Yield strength 255MPa (37ksi)
Elongation rate (gauge length 50mm) 30%
Additional notes
A178C belongs to the carbon steel boiler/superheater tubes under the American standard ASTM A178, which are available in two supply forms: resistance welding (ERW) and seamless. It focuses on temperature resistance, pressure resistance, and corrosion resistance, and is widely used in boiler flues, heat exchange tubes, pressure vessel components, and other scenarios. Domestic manufacturers can provide regular size stock and non-standard customization.
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