12CrMo alloy steel
Chemical composition
Grade: 12CrMo
Standard: GB / T 3077-1988
Digital Code: A30122
Corresponding foreign standards: JIS G4053: 2003
A29M: 2005 ISO 683-18:1996
Corresponding to the Japanese brands: 13CrMo44 (1.7335)
Corresponding to the British brands :1501-620Gr · 27
For French brands: 12CD4
12crmo Introduction
Features and application: is the thermal strength pearlitic steel, cold-strain plasticity and can be both good machinability, weldability acceptable.
Parameters for the manufacture of steam pipe leading up to 510 ℃, the wall temperature of 540 ℃ of hot tubes, etc., can also produce a variety of flexible working under high temperature components.
Chemical composition:
Carbon C: 0.08 ~ 0.15
Si Si: 0.17 ~ 0.37
Manganese Mn: 0.40 ~ 0.70
Sulfur S: promised to the residual content of ≤ 0.035
Phosphorus P: agreed residual content of ≤ 0.035
Chromium Cr: 0.40 ~ 0.70
Ni: to promise the residual content of ≤ 0.030
Copper Cu: agreed residual content ≤ 0.030
Mo Mo: 0.40 ~ 0.55
Mechanical properties
Mechanical properties:
Tensile strength σb (MPa): ≥ 410 (42)
Yield strength σs (MPa): ≥ 265 (27)
Elongation δ5 (%): ≥ 24
Reduction of area ψ (%): ≥ 60
Impact energy Akv (J): ≥ 110
Impact toughness αkv (J/cm2): ≥ 137 (14)
Hardness: ≤ 179HB
Sample size: sample blank size of 30mm
