TBS-1000 is a high carbon alloy steel developed for continuous operation up to 900 F and up to 1000 F for short periods. It is recommended for bearing applications at elevated temperatures and for certain high temperature tooling applications. This datasheet provides information on composition, physical properties, microstructure, hardness, and elasticity. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-148. Producer or source: Timken Roller Bearing Company.