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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)
632 (≥) 884 (≥) 13 44 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 411

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
32 - -     0.14 -  
476 812 - 31.3 421   -  
461 - 24 34.2   113 334

Heat Treatment of steel grade 20CrMo

Heat treated : 1363°C - 1138°C

Technological Curves of steel grade 20CrMo

Cross Reference Table (Equivalent Grade) of 20CrMo

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