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.HERCULES is a high-carbon chromium-vanadium tool steel recommended for cold-working applications where a hard, wear-resistant surface along with a tough core is required.