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18 CrMoS 4

Germany DIN 18CrMoS4 Case hardening steels - Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 18CrMoS4 / 18 CrMoS 4
Category Grade Standard Region/Area Standard Content
Metals 18 CrMoS 4 DIN EN 10084 Germany Case hardening steels - Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the 18 CrMoS 4

Element Min Max Similar
Mo 0.1500 0.2500 -
Cr 0.9000 1.2000 -
P - 0.0350 -
S - 0.0350 -
Mn 0.6000 0.9000 -
Si - 0.4000 -
C 0.1500 0.2100 -
Si - 0.3000 -
S 0.0200 0.0400 -
P - 0.0250 -
Mo 0.1500 0.2500 -
Mn 0.6000 0.9000 -
Cu - 0.2500 -
Cr 0.9000 1.2000 -
C 0.1500 0.2100 -

Mechanical Properties of steel grade 18 CrMoS 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)
424 (≥) 317 (≥) 34 21 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade 18 CrMoS 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
23 - -     0.33 -  
975 529 - 13.3 212   -  
337 - 11 32.2   343 212

Heat Treatment of steel grade 18 CrMoS 4

Heat treated : 1696°C - 1778°C

Technological Curves of steel grade 18 CrMoS 4

Cross Reference Table (Equivalent Grade) of 18 CrMoS 4

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