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.ELECTRITE CO-6 is a high-speed steel of the 6 molybdenum-6 tungsten type to which 9% cobalt has been added. This cobalt addition increases the red hardness and permits a retention of greater cutting hardness at elevated temperatures. It is designated as SAE-M36 and AISI Type M36.