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20 MoCr 4

Germany DIN 20MoCr4 Bright steel made from case hardening steel; technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20MoCr4 / 20 MoCr 4
Category Grade Standard Region/Area Standard Content
Metals 20 MoCr 4 DIN 1652-3 Germany Bright steel made from case hardening steel; technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the 20 MoCr 4

Element Min Max Similar
Mo 0.4000 0.5000 -
Cr 0.3000 0.6000 -
P - 0.0350 -
S - 0.0350 -
Mn 0.7000 1.0000 -
Si - 0.4000 -
C 0.1700 0.2300 -
Si - 0.3000 -
S - 0.0250 -
P - 0.0250 -
Mo 0.4000 0.5000 -
Mn 0.7000 1.0000 -
Cu - 0.2500 -
Cr 0.3000 0.6000 -
C 0.1700 0.2300 -
Si 0.1500 0.4000 -
S - 0.0350 -
P - 0.0350 -
Mo 0.4000 0.5000 -
Mn 0.6000 0.9000 -
Cr 0.3000 0.5000 -
C 0.1700 0.2200 -
Si - 0.4000 -
S - 0.0350 -
P - 0.0350 -
Mo 0.4000 0.5000 -
Mn 0.7000 1.0000 -
Cr 0.3000 0.6000 -
C 0.1700 0.2200 -
Si 0.1500 0.4000 -
S - 0.0350 -
P - 0.0350 -
Mo 0.4000 0.5000 -
Mn 0.6000 0.9000 -
Cr 0.3000 0.5000 -
C 0.1700 0.2200 -

Mechanical Properties of steel grade 20 MoCr 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)
745 (≥) 275 (≥) 34 14 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 314

Physical Properties of steel grade 20 MoCr 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
11 - -     0.41 -  
372 533 - 41.3 142   -  
431 - 41 32.2   334 131

Heat Treatment of steel grade 20 MoCr 4

Heat treated : 1491°C - 1184°C

Technological Curves of steel grade 20 MoCr 4

Cross Reference Table (Equivalent Grade) of 20 MoCr 4

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