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.HS-100 is a super high-speed steel built on an AISI Type M33 base but with higher carbon and cobalt. It is able to attain an approximate hardness of Rockwell C 68 with normal heat treatment. It gains its great resistance to wear from its high hardness rather than from excess vanadium carbides. HS-100 is recommended for applications where long production runs or heavy-duty machining is involved.