CARPENTER TEN STAR is a general-purpose molybdenum-bearing high-speed steel. Its excellent wear and cutting properties are the result of its high percentages of carbon and vanadium. It is produced by the ESR (Electro Slag Remelting) process. This datasheet provides information on composition and hardness as well as deformation. It also includes information on forming, heat treating, and machining. Filing Code: TS-344. Producer or source: Carpenter. Originally published as Carpenter Ten Star, January 1979, revised June 1991.