BETHLEHEM RQC-90 is a roller quenched and tempered carbon steel with a 90,000 psi yield strength combined with good notch toughness and weldability. It is available in thicknesses through 11/2 inches. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: CS-45. Producer or source: Bethlehem Steel Corporation.