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.ALLVAC RENE 41 in the age-hardened condition has exceptionally high strength at room temperature and in the 1200-1800 F (649-982 C) temperature range. It is produced by double vacuum melting (induction + vacuum arc or induction + electroslag remelting).