Patent ID: 7229508

Claim:
An aluminum alloy having improved strength and ductility, comprising: a) Cu4.7–5.2wt. %, Mg 0.2–0.6 wt. % Mn 0.2–0.5 wt. % Ag 0.2–0.5 wt. % Ti 0.03–0.09 wt. % and optionally one or more selected from the group consisting of Cr 0.1–0.8 wt. %, Hf 0.1–1.0 wt. %, Sc 0.05–0.6 wt. %, and V 0.05–0.15 wt. %. b) balance aluminum and normal and/or inevitable elements and impurities, and wherein said alloy is substantially zirconium-free.