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X-Au74.5CuNiZn

China GJB X-Au74.5CuNiZn 贵金属及其合金电刷丝材和线材规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: X-Au74.5CuNiZn / X-Au74.5CuNiZn
Category Grade Standard Region/Area Standard Content
Metals X-Au74.5CuNiZn GJB 954A China 贵金属及其合金电刷丝材和线材规范

Chemical composition(mass fraction)(wt.%) of the X-Au74.5CuNiZn

Element Min Max Similar
Au 74.0000 75.0000 -
Cu 21.5000 22.5000 -
Ni 2.0000 3.0000 -
Zn 0.7000 1.3000 -
Fe - 0.0500 -
Pb - 0.0050 -
Sb - 0.0050 -
Bi - 0.0050 -
Total Others - 0.2000 -

Mechanical Properties of steel grade X-Au74.5CuNiZn

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)
865 (≥) 963 (≥) 24 32 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 432

Physical Properties of steel grade X-Au74.5CuNiZn

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
14 - -     0.44 -  
494 427 - 42.3 413   -  
498 - 12 34.2   233 121

Heat Treatment of steel grade X-Au74.5CuNiZn

Heat treated : 1449°C - 1552°C

Technological Curves of steel grade X-Au74.5CuNiZn

Cross Reference Table (Equivalent Grade) of X-Au74.5CuNiZn

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