GENERAL SCOPE
 

Alloy 718, a nickel based superalloy, developed initially for use in rotating parts in aerospace and gas turbine applications, has become the preferred material for the manufacture of Wellhead Components, Auxiliary and Down Hole Tools, and Sub-Surface Safety Valves, due mainly to its excellent resistance to crack sensitive species such as CO₂, chlorides, and H₂S.

The alloy also possesses excellent sub zero toughness and resistance to hydrogen embrittlement, both factors which can be as important as strength and corrosion resistance. A `double vacuum melt` process is used – either VIM/VAR (vacuum induction melting, followed by vacuum arc remelting), or VIM/ESR (vacuum induction melting, followed by electro slag refining).

Also available with strength levels up to 140 KSI 0.2%PS.