Lucefin Group 41Cr4 and 41CrS4 are medium-carbon, 1% chromium, direct hardening alloy steels that are also suitable for flame and induction hardening. These steels are low hardenability steels in the 0.40 to 0.42 mean carbon content classification. They are used for small and medium size parts that require a higher degree of strength and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-860. Producer or source: Lucefin S.p.A..