MCH is a medium-carbon, high-molybdenum hot-work steel developed to supplement the medium-carbon, high-tungsten (AISI Type H24) hot-work type of steel. It is a modified high-speed steel that will attain hardness in excess of Rockwell C 60. Because of the careful selection of alloying elements, it will resist wash and abrasion at high operating temperatures. MCH is considerably tougher than either the low-carbon AISI Type M2 steel or the medium-carbon, high tungsten (H24) hot-work steel. MCH should not be water cooled in service. Best hot-work die life is obtained by preheating the dies prior to use. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, and machining. Filing Code: TS-471. Producer or source: Latrobe Steel Company.