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China GJB 7A04 铝合金预拉伸板材规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 7A04 / 7A04
Category Grade Standard Region/Area Standard Content
Metals 7A04 GJB 1741A China 铝合金预拉伸板材规范

Chemical composition(mass fraction)(wt.%) of the 7A04

Element Min Max Similar
Si - 0.5000 -
Fe - 0.5000 -
Cu 1.4000 2.0000 -
Mn 0.2000 0.6000 -
Mg 1.8000 2.8000 -
Cr 0.1000 0.2500 -
Zn 5.0000 7.0000 -
Ti - 0.1000 -
Others total - 0.0500 -
Total Others - 0.1000 -
Al - - -
Si - 0.5000 -
Fe - 0.5000 -
Cu 1.4000 2.0000 -
Mn 0.2000 0.6000 -
Mg 1.8000 2.8000 -
Cr 0.1000 0.2500 -
Zn 5.0000 7.0000 -
Ti - 0.1000 -
Others total - 0.0500 -
Total Others - 0.1000 -
Al - - -

Mechanical Properties of steel grade 7A04

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)
971 (≥) 917 (≥) 13 44 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 311

Physical Properties of steel grade 7A04

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
21 - -     0.44 -  
457 253 - 34.3 433   -  
486 - 23 11.2   233 224

Heat Treatment of steel grade 7A04

Heat treated : 1497°C - 1269°C

Technological Curves of steel grade 7A04

Cross Reference Table (Equivalent Grade) of 7A04

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