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.AISI 4615 is a low-carbon, nickel-molybdenum alloy steel of the carburizing grade, recommended for applications where high toughness and excellent wear resistance are required.