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.Allegheny Ludlum Type 425 Mod is hardenable by heat treatment. This straight-chromium grade is used where strength, hardness and/or wear resistance need to be combined with corrosion resistance.