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 500 ZB is an austenitic precipitation hardening alloy which develops outstanding tensile, fatigue and stress-rupture properties. It is suited to longtime service requirements up to 1800 F (982 C). It is produced by vacuum induction melting plus vacuum arc remelting.