SAE 8650 is a triple-alloy steel of the oil-hardening type. Its good hardenability and strength make it suitable for many machine and tool components. 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: SA-274. Producer or source: Alloy steel mills and foundries.