Patent ID: 8157932

Claim:
A shaped cast aluminum alloy product produced from a casting alloy consisting of, in weight percent: from 4 to 9% Zn; from 2 to 4% Mg; from more than 1.0 wt % Cu to 2.5% Cu; less than 0.1% Si; less than 0.12% Fe; less than 0.5% Mn; from 0.01 to 0.05% B; less than 0.15% Ti; from 0.05 to 0.2% Zr; from 0.1 to 0.5% Sc; no more than 0.05% each miscellaneous element or impurity; no more than 0.15% total miscellaneous elements or impurities; and remainder Al; wherein the shape cast aluminum alloy product is produced from a casting process consisting of investment casting, permanent mold casting, semi-permanent mold casting, and sand mold casting.