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China GB H70A 加工铜及铜合金牌号和化学成分 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: H70A / H70A
Category Grade Standard Region/Area Standard Content
Metals H70A GB/T 5231 China 加工铜及铜合金牌号和化学成分

Chemical composition(mass fraction)(wt.%) of the H70A

Element Min Max Similar

Mechanical Properties of steel grade H70A

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)
689 (≥) 393 (≥) 31 32 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 334

Physical Properties of steel grade H70A

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 - -     0.42 -  
913 446 - 13.3 232   -  
876 - 34 33.2   231 224

Heat Treatment of steel grade H70A

Heat treated : 1754°C - 1213°C

Technological Curves of steel grade H70A

Cross Reference Table (Equivalent Grade) of H70A

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