Alloy Steel 3.5 Ni-0.25Mo-0.05V is highly suitable for massive components, usually more than four inches thick. It has only moderate hardenability but 5-inch to 80-inch rounds can be cooled from the austenitizing temperature in air or a water-spray quench to produce ferrite, bainite and martensite of ferrite and bainite. This steel is suitable for light and intermediate-duty generator and turbine rotors, large axles and shafts, large gears and ship forgings. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-400. Producer or source: Alloy steel mills and foundries.