Ferrovac-4340 is a vacuum melted chromium, nickel, molybdenum alloy steel having high endurance limit, high notched tensile strength, and high transverse ductility. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-68. Producer or source: Vacuum Metals Corporation.