Carpenter Project 70+ 15Cr-5Ni is a modified version of Type 15Cr-5Ni stainless steel with improved machinability. The material meets all aspects of the aerospace specification AMS 5659. This datasheet provides information on composition, physical properties, microstructure, hardness, and tensile properties as well as fracture toughness, and deformation. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-889. Producer or source: Carpenter Specialty Alloys.