AISI Type 02 is an oil-hardening, non-deforming manganese tool steel ideally suited for general-purpose toolroom work. It can be hardened safely, even in the most intricate sections, and shows very little warpage or change in size during hardening. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-273. Producer or source: Tool steel mills.