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20NiCrMo7

Japan JIS 20NiCrMo7 高碳鉻軸承鋼鋼料 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20NiCrMo7 / 20NiCrMo7
Category Grade Standard Region/Area Standard Content
Metals 20NiCrMo7 JIS G4805 Japan 高碳鉻軸承鋼鋼料

Chemical composition(mass fraction)(wt.%) of the 20NiCrMo7

Element Min Max Similar

Mechanical Properties of steel grade 20NiCrMo7

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)
518 (≥) 616 (≥) 14 32 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 211

Physical Properties of steel grade 20NiCrMo7

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
31 - -     0.21 -  
129 825 - 12.3 433   -  
285 - 11 33.2   232 243

Heat Treatment of steel grade 20NiCrMo7

Heat treated : 1233°C - 1948°C

Technological Curves of steel grade 20NiCrMo7

Cross Reference Table (Equivalent Grade) of 20NiCrMo7

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