GearMet C69 possesses surface properties superior to those of conventional gear steels with the advantage of a flaw tolerant core. These surface properties allow either higher contact stresses at an equivalent life, thus reducing the gear size, or significantly longer wear life at the same contact stress when compared to existing carburized gear steels. This datasheet provides information on composition and hardness as well as fatigue. It also includes information on wear resistance as well as heat treating. Filing Code: SA-500. Producer or source: QuesTek Innovations, LLC.