CRUCIBLE 303 PLUS is an austenitic chromium-nickel stainless steel to which elements have been added to improve the machinability and non-galling characteristics. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-265. Producer or source: Crucible Specialty Metals Division, Colt Industries.