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25 MoCr 4

Germany DIN 25MoCr4 Case hardening steels; technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 25MoCr4 / 25 MoCr 4
Category Grade Standard Region/Area Standard Content
Metals 25 MoCr 4 DIN 17210 Germany Case hardening steels; technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the 25 MoCr 4

Element Min Max Similar
Si 0.1500 0.4000 -
S - 0.0350 -
P - 0.0350 -
Mo 0.4000 0.5000 -
Mn 0.6000 0.9000 -
Cr 0.4000 0.6000 -
C 0.2300 0.2900 -

Mechanical Properties of steel grade 25 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)
955 (≥) 659 (≥) 13 41 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 311

Physical Properties of steel grade 25 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
31 - -     0.11 -  
454 344 - 31.3 112   -  
724 - 34 23.2   341 424

Heat Treatment of steel grade 25 MoCr 4

Heat treated : 1324°C - 1668°C

Technological Curves of steel grade 25 MoCr 4

Cross Reference Table (Equivalent Grade) of 25 MoCr 4

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