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.Vulcan-Kidd 4870 is a fine grained, deep hardening, water quenching steel with very shock resistance and good wear resistance. It is a tough cold working tool steel.