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.Cyclops S5 is a tough, shock resisting tool and die steel recommended for cold working tools requiring a combination of good ductility, high hardness and wear resistance.