AISI 1144 is a resulfurized carbon steel containing nominally 1.50% manganese and 0.24-0.33% sulfur to provide a free-machining steel. It is recommended especially for high-production automatic machine products. It has relatively low hardenability. Its ductility and toughness are reasonably good in the longitudinal direction, but they tend to be low in the transverse direction. The many uses of AISI 1144 include mine-car axles and shafts, screws, propeller shafts, ball joints, bushings, bolts and gears. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: CS-98. Producer or source: Carbon steel mills.