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.HALCOMB 425 is a hot work tool steel having excellent resistance to shock and abrasion at elevated temperatures. It is recommended for brass and copper extrusion dies, forging dies and inserts, and hot punches.