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.COLMONOY No. 845 is a complex of both a matrix alloy enriched with an extremely hard grade of tungsten carbide. It is specifically formulated to produce hardness levels of RC 57-62.