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China HB 20Mn2A 航空结构钢热处理工艺 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20Mn2A / 20Mn2A
Category Grade Standard Region/Area Standard Content
Metals 20Mn2A HB/Z 136 China 航空结构钢热处理工艺

Chemical composition(mass fraction)(wt.%) of the 20Mn2A

Element Min Max Similar

Mechanical Properties of steel grade 20Mn2A

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)
188 (≥) 146 (≥) 12 14 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 213

Physical Properties of steel grade 20Mn2A

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
34 - -     0.12 -  
114 848 - 31.3 314   -  
674 - 14 41.2   342 123

Heat Treatment of steel grade 20Mn2A

Heat treated : 1211°C - 1649°C

Technological Curves of steel grade 20Mn2A

Cross Reference Table (Equivalent Grade) of 20Mn2A

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