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.SUPER STAR is a super high-speed steel capable of being treated to high hardness levels. Its combination of composition and properties facilitates the machining of high-hardness materials and difficult-to-machine superalloys. Excellent hot hardness and wear resistance are obtained in Super Star without loss of edge toughness.