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.STAR-M0 M-2 is a tungsten-molybdenum high-speed steel of the 6-6-2 type having good red-hardness quality. This alloy corresponds to AISI type M2. Star-M0 is also available in Free-Machining type, to which sulphur, in the form of alloy sulphides, has been added for better machinability and increased tool life.