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China 舞钢Q/WTB 42CrMo4 "05CK-81"合同钢板技术条件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 42CrMo4 / 42CrMo4
Category Grade Standard Region/Area Standard Content
Metals 42CrMo4 WJX 048 China "05CK-81"合同钢板技术条件

Chemical composition(mass fraction)(wt.%) of the 42CrMo4

Element Min Max Similar
Cr 0.9000 1.2000 -
Mo 0.1500 0.2500 -
S - 0.0250 -
P - 0.0350 -
Mn 0.6000 0.9000 -
Si - 0.3500 -
C 0.3800 0.4500 -
Cr 0.9000 1.2000 -
Mo 0.1500 0.2500 -
S - 0.0250 -
P - 0.0350 -
Mn 0.6000 0.9000 -
Si - 0.3500 -
C 0.3800 0.4500 -
Cr 0.9000 1.2000 -
Mo 0.1500 0.3000 -
S - 0.0250 -
P - 0.0250 -
Mn 0.6000 0.9000 -
Si - 0.3500 -
C 0.3800 0.4500 -
Mo 0.1500 0.3000 -
Cr 0.9000 1.2000 -
S - 0.0350 -
P - 0.0350 -
Mn 0.6000 0.9000 -
Si - 0.4000 -
C 0.3800 0.4500 -

Mechanical Properties of steel grade 42CrMo4

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)
647 (≥) 245 (≥) 24 43 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 432

Physical Properties of steel grade 42CrMo4

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 -  
933 296 - 11.3 311   -  
216 - 44 32.2   431 311

Heat Treatment of steel grade 42CrMo4

Heat treated : 1541°C - 1976°C

Technological Curves of steel grade 42CrMo4

Cross Reference Table (Equivalent Grade) of 42CrMo4

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