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.Lescalloy 6305 VAC-ARC steel is a modified AISI 4140 steel with higher molybdenum content and additional vanadium. The alloy is most frequently used in the quenched and tempered condition. Jet engine shafting is a typical application.