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Germany DIN 20Cr4 Bright steel made from case hardening steel; technical delivery conditions and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20Cr4 / 20 Cr 4
Category Grade Standard Region/Area Standard Content
Metals 20 Cr 4 DIN 1652-3 Germany Bright steel made from case hardening steel; technical delivery conditions

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

Element Min Max Similar
Si - 0.4000 -
S - 0.0350 -
P - 0.0350 -
Mn 0.6000 0.9000 -
Cr 0.9000 1.2000 -
C 0.1700 0.2300 -

Mechanical Properties of steel grade 20 Cr 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)
137 (≥) 849 (≥) 24 32 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 212

Physical Properties of steel grade 20 Cr 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
13 - -     0.21 -  
255 918 - 33.3 123   -  
849 - 13 44.2   131 342

Heat Treatment of steel grade 20 Cr 4

Heat treated : 1744°C - 1558°C

Technological Curves of steel grade 20 Cr 4

Cross Reference Table (Equivalent Grade) of 20 Cr 4

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