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.Thermold 75 is a chromium-molybdenum-cobalt hot work steel that has outstanding resistance to softening when tempering, and also very good thermal fatigue characteristics. It is recommended for aluminum die casting dies, forging dies and extrusion dies.