Patent ID: 8357249

Claim:
An aluminum alloy product, consisting essentially of: from about 6.2 wt. % to about 6.7 wt. % Zn; from 1 wt. % to about 2 wt. % Mg, wherein Mg is present in an amount from (0.2×Zn−0.3) wt. % to (0.2×Zn+0.3) wt. %; at least one intermetallic dispersoid forming element selected from a group consisting of Zr and Ti; and balance aluminum and inevitable impurities, wherein the copper content is less than 0.08 wt. %, and wherein the manganese content is less than 0.1 wt. %, and wherein said product is an as-cast product or wrought product manufactured by rolling or forging, with a wall thickness of at least 4 inches, said product being artificially age hardened.