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China HB T7A 航空结构钢热处理工艺 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: T7A / T7A
Category Grade Standard Region/Area Standard Content
Metals T7A HB/Z 136 China 航空结构钢热处理工艺

Chemical composition(mass fraction)(wt.%) of the T7A

Element Min Max Similar

Mechanical Properties of steel grade T7A

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)
822 (≥) 723 (≥) 11 34 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 442

Physical Properties of steel grade T7A

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
23 - -     0.11 -  
512 297 - 34.3 343   -  
476 - 13 42.2   432 314

Heat Treatment of steel grade T7A

Heat treated : 1796°C - 1481°C

Technological Curves of steel grade T7A

Cross Reference Table (Equivalent Grade) of T7A

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