Lucefin Group 34CrMo4 and 34CrMoS4 are medium-carbon, 1% chromium-molybdenum direct hardening alloy steels that are also suitable for flame and induction hardening, and nitriding. These steels are medium hardenability steels in the 0.30 to 0.37 mean carbon content classification. They are used for water-quenched parts of moderate section size and for oil-quenched parts of small section size. In general, they are used for parts requiring high strength and toughness. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, machining, and joining. Filing Code: SA-863. Producer or source: Lucefin S.p.A.