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.Alcoa alloy 2090-T83 is an aluminum-lithium sheet alloy with a combination of strength, low density, and corrosion resistance. The alloy is used in aerospace applications.