Patent ID: 7449073
Filing Date: 2008-11-11
Classification: C22C

Abstract:
1. A 2xxx series alloy product having an effective combination of strength, toughness and corrosion resistance, an alloy consisting essentially of, Cu: about 3.0 to about 4.0 wt. %, Mg: about0.4to about 1.1 wt. %, Mn about 0.20 to about 0.9 wt %, combined weight percent of Fe and Si less than about 0.25 wt. %, Ag about 0.3 wt. % to about 0.8 wt. % Zn up to about 0.40 wt. %, and up to about 0.1 wt. % of a grain refiner, the remainder aluminum and incidental elements and impurities, wherein the combined weight percent of Ag and Zn is at least about 0.3 wt.% and the Cu and the Mg are present in a ratio of about 3.6-4.5 parts Cu to about 1 part Mg.