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.VASCO SUPREME is a high carbon, cobalt type of high-speed steel combining very high hardness, hot-hardness, wear resistance and toughness. It possesses performance qualities surpassing those of commonly used grades of high-speed steel.