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. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: SS-806. Producer or source: Allegheny Ludlum Corporation.