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 S2 is a high-silicon, shock-resisting tool steel with extreme toughness. It has good ductility and toughness at high strength levels, and gives excellent service in those applications where shock and impact are major factors.