AISI 1118 is a low carbon steel containing relatively high manganese and sulfur to provide free-machining characteristics. It is resulfurized coarse-grain type of steel. AISI 1118 is commonly used to produce carbunized components and parts but can be used without carburizing for some applications that do not require a hard surface. Among its many uses are bushings, gears, pins, shafts, and nuts and bolts. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-91. Producer or source: Carbon steel mills. See also Alloy Digest CS-55, August 1974.

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