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China GJB 20CrMoA 航空用钢锻件规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20CrMoA / 20CrMoA
Category Grade Standard Region/Area Standard Content
Metals 20CrMoA GJB 5040 China 航空用钢锻件规范

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

Element Min Max Similar

Mechanical Properties of steel grade 20CrMoA

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)
163 (≥) 216 (≥) 42 42 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 343

Physical Properties of steel grade 20CrMoA

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 - -     0.43 -  
184 431 - 22.3 313   -  
124 - 22 43.2   221 111

Heat Treatment of steel grade 20CrMoA

Heat treated : 1874°C - 1191°C

Technological Curves of steel grade 20CrMoA

Cross Reference Table (Equivalent Grade) of 20CrMoA

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