AISI Type A8 is a medium-carbon, high-hardenability tool and die steel for cold-work applications. It has an excellent combination of high hardenability, toughness and wear resistance that makes it useful for special tools. Among its many applications are heavy-duty blanking and heading dies, rotary slitters, shear knives and cold-forming rolls. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and surface treatment. Filing Code: TS-390. Producer or source: Tool steel mills.