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20 NiCrMo 2

France AFNOR NF 20NiCrMo2 Iron and steel. Steels for bearings. Types and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20NiCrMo2 / 20 NiCrMo 2
Category Grade Standard Region/Area Standard Content
Metals 20 NiCrMo 2 NF A35-565 France Iron and steel. Steels for bearings. Types

Chemical composition(mass fraction)(wt.%) of the 20 NiCrMo 2

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0150 -
P - 0.0250 -
Ni 0.4000 0.7000 -
Mo 0.1500 0.2500 -
Mn 0.7000 0.9000 -
Cu - 0.3000 -
Cr 0.4000 0.6000 -
C 0.1800 0.2300 -
Al - 0.0500 -

Mechanical Properties of steel grade 20 NiCrMo 2

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)
415 (≥) 544 (≥) 22 13 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 142

Physical Properties of steel grade 20 NiCrMo 2

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
22 - -     0.34 -  
321 447 - 32.3 222   -  
268 - 43 11.2   141 142

Heat Treatment of steel grade 20 NiCrMo 2

Heat treated : 1933°C - 1997°C

Technological Curves of steel grade 20 NiCrMo 2

Cross Reference Table (Equivalent Grade) of 20 NiCrMo 2

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