YOLOY is a high strength-low alloy, nickel-copper steel combining excellent formability with good corrosion resistance to the atmosphere. It has high ductility and excellent weldability. Its abrasion resistance is about 2 or 3 times that of carbon steel of similar strength. YOLOY is marketed in three different grades, namely, Grade ACR, Grade HSX and Grade HS. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness and fatigue. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-5. Producer or source: Youngstown Sheet and Tube Company.