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China GB T69250 加工铜及铜合金牌号和化学成分 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: T69250 / T69250
Category Grade Standard Region/Area Standard Content
Metals T69250 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 T69250

Element Min Max Similar
Zn - - -
Pb - 0.1000 -
Others total - 0.9000 -
Ni 2.0000 3.0000 -
Fe - 0.5000 -
Cu 57.0000 60.0000 -
Al 2.5000 3.5000 -

Mechanical Properties of steel grade T69250

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)
998 (≥) 482 (≥) 44 12 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 111

Physical Properties of steel grade T69250

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 - -     0.41 -  
721 619 - 11.3 111   -  
748 - 24 24.2   224 233

Heat Treatment of steel grade T69250

Heat treated : 1588°C - 1466°C

Technological Curves of steel grade T69250

Cross Reference Table (Equivalent Grade) of T69250

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