View Sample Alloy Digest Data Sheet (PDF)Since 1952, Alloy Digest has been the leading reference for materials property data on metals and alloys used throughout the world. Featuring graphs, charts and tables, these sheets give facts and figures on composition or characterization, physical and mechanical properties, heat treatment, and machinability.Like other 6XXX aluminum series alloys, AA6066 contains magnesium and silicon in approximate proportions to form Mg2Si, the constituent responsible for the precipitation hardening capability of the alloy. AA6066 develops intermediate strength levels when heat treated and it possesses good formability and corrosion resistance.