TLS A6 is a medium-alloy air-hardening tool steel that is known for its through hardening at the low temperatures typically used with oil-hardening tool steels. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on wear resistance as well as heat treating and machining. Filing Code: TS-638. Producer or source: Timken Latrobe Steel.