OMEGA is a silicon-manganese shock-resisting tool steel recommended for repeated and severe impact service. This is an A.S.M. Class III-C tool steel (SAE Type S5.) This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, and machining. Filing Code: TS-29. Producer or source: Bethlehem Steel Corporation.