AISI 1065 is a high-carbon oil-hardening machinery and tool steel of low hardenability. It is used for springs, hand tools, machinery parts, shafts and many machine tools requiring strength and wear resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as heat treating, machining, and joining. Filing Code: CS-63. Producer or source: Carbon steel mills.