A380.1 casting aluminum alloy has a big specific gravity, a good casting performance, a good mechanical properties and high wear A380.1 casting aluminum alloy has a big specific gravity, a good casting performance, a good mechanical properties and high wear.chemical compositionSi 7.5-9.5Cu 3.0-4.0Mg 0.1 maxZn 2.9 maxMn 0.5 maxFe 1.0 maxSn 0.35 maxAl remainder A380.1 aluminum alloy casting