Lucefin 25CrMo4 and 25CrMoS4 are low-carbon, chromium-molybdenum direct hardening alloy steels. These low hardenability steels are used for water-quenched parts of moderate section size and for oil-quenched parts of small section size. In general, these steels are used for parts requiring high strength and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-874. Producer or source: Lucefin S.p.A.