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G42 CrMo 4

France AFNOR NF G42CrMo4 一般工程使用的钢铸件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: G42CrMo4 / G42 CrMo 4
Category Grade Standard Region/Area Standard Content
Metals G42 CrMo 4 NF EN 10293 France 一般工程使用的钢铸件

Chemical composition(mass fraction)(wt.%) of the G42 CrMo 4

Element Min Max Similar
V - 0.0500 -
Si - 0.6000 -
S - 0.0200 -
P - 0.0300 -
Ni - 0.4000 -
Mo 0.1500 0.3500 -
Mn - 1.0000 -
Cr 0.8000 1.2000 -
C 0.3900 0.4500 -
V - 0.0500 -
Si - 0.6000 -
S - 0.0200 -
P - 0.0250 -
Ni - 0.4000 -
Mo 0.1500 0.3000 -
Mn 0.6000 1.0000 -
Cu - 0.3000 -
Cr 0.8000 1.2000 -
C 0.3800 0.4500 -

Mechanical Properties of steel grade G42 CrMo 4

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)
916 (≥) 773 (≥) 41 11 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 342

Physical Properties of steel grade G42 CrMo 4

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
31 - -     0.22 -  
997 454 - 44.3 441   -  
568 - 23 21.2   144 122

Heat Treatment of steel grade G42 CrMo 4

Heat treated : 1841°C - 1958°C

Technological Curves of steel grade G42 CrMo 4

Cross Reference Table (Equivalent Grade) of G42 CrMo 4

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