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

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

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

Element Min Max Similar

Mechanical Properties of steel grade 20A

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)
935 (≥) 882 (≥) 34 41 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 114

Physical Properties of steel grade 20A

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
24 - -     0.23 -  
993 955 - 23.3 111   -  
514 - 14 12.2   321 111

Heat Treatment of steel grade 20A

Heat treated : 1467°C - 1698°C

Technological Curves of steel grade 20A

Cross Reference Table (Equivalent Grade) of 20A

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