Yoloy-S is a nickel-copper alloy steel recommended for use where yield points higher than 50,000 psi are required, together with good formability as hot rolled and greatly increased resistance to atmospheric corrosion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties 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-74. Producer or source: Youngstown Sheet and Tube Company.