Alliage 718

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Inconel Alloy 718 (UNS designation N07718) is one of the most commonly used nickel-based superalloys, an alloy class defined by high strength and resistance to elevated temperatures, corrosion, and oxidation. IN718 is especially designed for fatigue and creep resistance at temperatures up to 700 °C.The oxidation and corrosion resistance of Alloy 718 combined with its high strength are derived from the formation of gamma double prime ( γ ″ {\displaystyle \gamma ''} ) and gamma prime ( γ ′ {\displaystyle \gamma '} ) precipitates during age hardening, primarily facilitated by the addition of niobium (Nb) Inconel 718 was incidentally developed in the 1960s during INCO's development of Inconel 625. The purpose of its development was to create material that could be used for steam-line piping. Because of its excellent properties, IN718 is commonly used in aerospace (such as gas turbine engine components and cryogenic storage tanks), petrochemical (wellhead tools and high-strength bolting), and power generation industries.