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

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

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

Element Min Max Similar
Cu - 0.2000 -
Cr 0.7000 1.0000 -
S - 0.0350 -
P - 0.0300 -
Mn 0.5000 0.8000 -
Si 0.1700 0.3700 -
C 0.1800 0.2300 -

Mechanical Properties of steel grade 20CrH*

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)
747 (≥) 536 (≥) 42 31 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 322

Physical Properties of steel grade 20CrH*

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 - -     0.42 -  
925 316 - 34.3 144   -  
786 - 22 34.2   111 332

Heat Treatment of steel grade 20CrH*

Heat treated : 1384°C - 1953°C

Technological Curves of steel grade 20CrH*

Cross Reference Table (Equivalent Grade) of 20CrH*

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