Allvac 718-OP is a versatile alloy that is vacuum induction melted followed by a consumable melting process. The alloy is a special chemistry vacuum melted version of standard Allvac 718. It is a precipitation-hardenable, nickel-base alloy that can be used from -253 deg C (-423 deg F) to 704 deg C (1300 deg F). The main hardening constituent is a niobium-containing gamma prime precipitate. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-605. Producer or source: Allvac Metals Company.