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20 MnCrNi 4

France AFNOR NF 20MnCrNi4 Iron and steel. Steels for bearings. Types and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20MnCrNi4 / 20 MnCrNi 4
Category Grade Standard Region/Area Standard Content
Metals 20 MnCrNi 4 NF A35-565 France Iron and steel. Steels for bearings. Types

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

Element Min Max Similar

Mechanical Properties of steel grade 20 MnCrNi 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)
237 (≥) 934 (≥) 33 44 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 412

Physical Properties of steel grade 20 MnCrNi 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
33 - -     0.24 -  
713 391 - 23.3 121   -  
282 - 11 32.2   341 334

Heat Treatment of steel grade 20 MnCrNi 4

Heat treated : 1571°C - 1326°C

Technological Curves of steel grade 20 MnCrNi 4

Cross Reference Table (Equivalent Grade) of 20 MnCrNi 4

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