TIMKEN TBS-9 is a high-carbon, chromium-molybdenum ball-bearing steel that combines high hardenability and low cost. It was designed with metallurgical properties virtually equivalent to those of AISI 52100. TBS-9 is less expensive than the 52100 grade because annealing is simplified. It is produced to the same quality requirements as the 52100 steel. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fatigue. It also includes information on forming, heat treating, machining, and surface treatment. Filing Code: SA-363. Producer or source: Timken Company Steel Divison.