USS CARILLOY FC is a resulfurized, medium-carbon, manganese-chromium-molybdenum steel with good machinability and high strength. It is generally furnished in the quenched and tempered condition and requires no further heat treatment. 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-265. Producer or source: United States Steel Corporation.