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China JB 20CrMo 机床零件热处理技术条件 第5部分:渗氮、氮碳共渗 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20CrMo / 20CrMo
Category Grade Standard Region/Area Standard Content
Metals 20CrMo JB/T 8491.5 China 机床零件热处理技术条件 第5部分:渗氮、氮碳共渗

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

Element Min Max Similar

Mechanical Properties of steel grade 20CrMo

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)
162 (≥) 274 (≥) 13 44 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical Properties of steel grade 20CrMo

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 - -     0.11 -  
219 989 - 21.3 214   -  
145 - 14 14.2   422 311

Heat Treatment of steel grade 20CrMo

Heat treated : 1595°C - 1593°C

Technological Curves of steel grade 20CrMo

Cross Reference Table (Equivalent Grade) of 20CrMo

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