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.Thermold-Z is a tool steel quality mold grade expressly designed for maximum production at moderate cost for zinc and other low temperature casting metals; and for injection molded and compression molded plastics.