Microalloy Steel for Pitman Arm Forgings

The effect of a different type of microalloy material on the durability and processing of an existing pitman arm design was evaluated. The durability properties of a particular type microalloy material i.e. impact toughness, impact ductility, programmed fatigue life and high load fatigue life properties, were evaluated and compared to the current production conventional heat treated material. Metallurgical evaluation was performed and showed that the hardness and microstructure of the acicular ferrite - bainitic microalloy was nearly independent of the cooling rate from hot forging and could provide equivalent or better properties as compared to conventional quench and tempered forgings.