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China CGMA 20CrMo 车辆齿轮用钢 技术条件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20CrMo / 20CrMo
Category Grade Standard Region/Area Standard Content
Metals 20CrMo CGMA001-1 China 车辆齿轮用钢 技术条件

Chemical composition(mass fraction)(wt.%) of the 20CrMo

Element Min Max Similar
Mo 0.1500 0.2500 -
Cr 0.8000 1.1000 -
S - 0.0250 -
P - 0.0300 -
Mn 0.4000 0.7000 -
Si 0.1700 0.3700 -
C 0.1800 0.2300 -

Mechanical Properties of steel grade 20CrMo

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
999 (≥) 692 (≥) 11 24 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 223

Physical Properties of steel grade 20CrMo

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
24 - -     0.22 -  
523 246 - 23.3 123   -  
497 - 43 14.2   323 113

Heat Treatment of steel grade 20CrMo

Heat treated : 1323°C - 1146°C

Technological Curves of steel grade 20CrMo

Cross Reference Table (Equivalent Grade) of 20CrMo

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