Alloy 718 is a member of Inconel alloys which are chromium nickel superalloys.Nickel content above includes cobalt. Iron content as remainder. Developed in the early 1960’s, IN718 is still considered the material of choice for the majority of aircraft engine components with service temperatures below 1200°F (650°C). Inconel 718 is a precipitation-hardenable nickel-chromium alloy containing also significant amounts of iron, niobium, and molybdenum along with lesser amounts of aluminum and titanium. It combines corrosion resistance and high strength with outstanding weldability including resistance to postweld cracking. The alloy has excellent creep-rupture strength at temperatures to 1300°F (700°C).
The Inconel 718 UNS N07718 has excellent tensile strength and impact strength. Therefore it could be used in applications that require strength and corrosion resistant. The alloy is designated by the standard DIN 2.4668. The material composition includes carbon, manganese, phosphorus, sulfur and silicon in addition to nickel and chromium. This is a low carbon version of the alloys with the allowed maximum carbon content is up to 0.08% of the composition.
Applications: Aerospace, gas turbines, rocket motors, spacecraft, space shuttles, nuclear reactors, pumps, turbo pump seals, and tooling.
