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.DuraTech Pyrovan HC is air hardened and has a combination of strength, wear resistance, and toughness for use in blanking and sizing dies. The alloy is made by powder metallurgy.