AC4A alluminum alloy  be widely used automobile accessories, the wheel producing.

the chemical composition of AC4A:

Si   8.0-10.0

Cu   0.25max

Mg   0.35-0.6

Zn    0.25max

Mn   0.3-0.6

Fe    0.4max

Ni     0.1max

Ti      0.2max

Sn     0.05max

Cr     0.15max

Al      remainder

AC4A aluminum alloy