Timken 4419 alloy steel is a carbon-molybdenum type carburizing steel suitable for bearings, gears and other carburized articles produced by quenching directly from the carburizer. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low and high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-171. Producer or source: Timken Roller Bearing Company.