Timken 17-22A is a silicon-chromium-molybdenum-vanadium alloy steel having high resistance to thermal cracking and heat checking, even in a highly hardened condition, and also has good shock resistance at high hardness levels. It is available in two carbon grades. This datasheet provides information on composition, hardness, and tensile properties. Filing Code: SA-1. Producer or source: Timken Roller Bearing Company.