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 6463 is an aluminum-magnesium-silicon alloy used widely for extrusions. It can be hardened and strengthened by a precipitation-hardening heat treatment. Its many applications comprise extrusions for trim and archtectural use in the automotive, appliance and building industries.