Aluminium alloy sheet having good platability

摘要

The alloy consists essentially of 2 to 6 wt% of Mg, 0.1 to 0.5 wt% of Zn, 0.1 to 0.30 wt% of Fe and the balance of Al, and it may be used as the substrate for magnetic or optical discs. Also disclosed are compositions as above, wherein Zn is replaced by 0.03 to 0.4 wt% of Cu and wherein both Zn and Cu are included and the Fe range is extended to 0.01 to 0.3 wt%.