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.Aluminum alloy 7449 in the T7651 temper is solution heat treated, stress relieved, and overaged. This processing produces an alloy of high strength, good corrosion/exfoliation resistance, and good toughness. An application of interest is the upper-wing skin of aircraft structures.