USS FIFTY-N steel is a normalized high-strength low-alloy structural-quality plate steel having inherently good notch toughness. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive, shear, and bend strength as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-258. Producer or source: United States Steel Corporation.