Timken Latrobe Steel TLP A11 is a powder metallurgically produced A11 type of tool steel that is air hardening. It provides high wear resistance and a relatively high impact toughness. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on high temperature performance and wear resistance as well as heat treating and machining. Filing Code: TS-584. Producer or source: Timken Latrobe Steel.