AISI 1151 is a resulfurized carbon steel containing nominally 0.85% manganese and a range of 0.08-0.13% sulfur to make it free machining. Its ductility and toughness are reasonably good in the longitudinal direction but are low in the transverse direction. It is recommended highly for high-production automatic machine products. Its uses include axles and shafts, spindles, gears, bolts and bushings. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: CS-103. Producer or source: Carbon steel mills.