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.LESCO M-4 PM high-speed tool steel is a special purpose grade of the molybdenum-tungsten family. Abrasion and wear resistance are enhanced by the increased carbon and vanadium content. It is produced by the powder metallurgy process with resultant better grindability, toughness and improved microstructure as compared with conventional wrought M-4 steel. Sulfide additives enhance machinability.