Patent ID: 7547366
Filing Date: 2009-06-16
Classification: C22C,C22F

Abstract:
1. A 2000 series aluminum-based alloy having enhanced damage tolerance consisting essentially of: about 3.0 to about 4.0 wt % copper; about 0.4 to about 1.1 wt % magnesium; about 0.2 to about 0.8 wt % silver; up to about 0.6 wt % Zn, wherein the zinc is partially substituted for the silver and a combined amount of zinc and silver is up to about 0.9 wt %; up to about 0.25 wt % Zr; up to about 0.9 wt % Mn; a combined Si and Fe content of about 0.25 wt % or less; the balance substantially aluminum, incidental impurities and elements, said copper and magnesium present in a ratio of about 3.6-4.5 parts copper to about 1 part magnesium.