Patent ID: 9458528
Filing Date: 2016-10-04
CPC Classification: C22C,C22F

Claim Text:
1. A wrought aluminum alloy product consisting of: 3.5-4.4 wt. % Cu; 0.45-0.75 wt. % Mg; 0.45-0.75 wt. % Zn; 0.65-0.950 wt. % Li; 0.1-1.0 wt. % Ag; from 0.05 to 0.50 wt. % of at least one grain structure control element, wherein the at least one grain structure control element is selected from the group consisting of Zr, Sc, Cr, V, Hf, rare earth elements, and combinations thereof; up to 1.0 wt. % Mn; up to 0.15 wt. % Ti; up to 0.12 wt. % Si; up to 0.15 wt. % Fe; and the balance being aluminum and incidental impurities; wherein the wrought aluminum alloy product has a thickness of at least 12.7 mm; and wherein the wrought aluminum alloy product realizes a plane strain fracture toughness (K IC ) of at least 22 ksi√in.