CARPENTER U.D.R. is a low-chromium (nominally 0.50%) alloy steel made to the quality standards of tool steels. It was developed to meet the exacting standards of bearing manufacturers for a clean steel of uniform microstructure. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and surface treatment. Filing Code: SA-336. Producer or source: Carpenter.