USS AR is a medium-carbon, low-alloy steel used in the as-rolled condition for resistance to abrasion. It is a relatively low-cost steel and is employed in applications involving smooth-sliding abrasion, where abrasive materials such as grains, coal, ore, cement, gravel, light aggregate and earth are being handled. 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: SA-324. Producer or source: United States Steel Corporation.