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20 NiCrMoS 6-4

Germany DIN 20NiCrMoS6-4 Case hardening steels - Technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20NiCrMoS6-4 / 20 NiCrMoS 6-4
Category Grade Standard Region/Area Standard Content
Metals 20 NiCrMoS 6-4 DIN EN 10084 Germany Case hardening steels - Technical delivery conditions

Chemical composition(mass fraction)(wt.%) of the 20 NiCrMoS 6-4

Element Min Max Similar
Si - 0.3000 -
S 0.0200 0.0400 -
P - 0.0250 -
Ni 1.4000 1.7000 -
Mo 0.2500 0.3500 -
Mn 0.5000 0.9000 -
Cu - 0.2500 -
Cr 0.6000 0.9000 -
C 0.1600 0.2300 -

Mechanical Properties of steel grade 20 NiCrMoS 6-4

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)
196 (≥) 649 (≥) 11 24 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 123

Physical Properties of steel grade 20 NiCrMoS 6-4

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
42 - -     0.34 -  
354 277 - 44.3 424   -  
728 - 33 14.2   144 224

Heat Treatment of steel grade 20 NiCrMoS 6-4

Heat treated : 1996°C - 1217°C

Technological Curves of steel grade 20 NiCrMoS 6-4

Cross Reference Table (Equivalent Grade) of 20 NiCrMoS 6-4

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