What is Inconel 718? Nickel Alloys

Alloy 718 is a high-strength, corrosion-resistant nickel chromium alloy. The additions of Nb, Ti and Al form a series of precipitates with Ni during the controlled solution annealing and ageing process steps, resulting in a significant increase in strength and hardness of this alloy compared with alternative nickel alloys. It can be supplied in a variety of different strength levels or conditions, depending upon the extent of the ageing heat treatment.

The alloy is used in the Oil and Gas and chemical production industries on account of its high strength and resistance to chlorides, stress corrosion and sulphide stress cracking. Applications include valve trim, pump shafts and down-hole components.

Inconel is a trademark of Special Metal Inc, covering a family of nickel-chromium alloys.