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Alloy 718

A precipitation-hardenable nickel-chromium grade, Alloy 718, often referred to as Inconel 718, is a high strength superalloy used at temperatures up to 648°C.

With the addition of significant amounts of niobium and molybdenum along with aluminium and titanium, Alloy 718 has extremely high strength, excellent creep-stress rupture strength and good corrosion resistance.


Product form Size range from Size range to
Alloy 718 round bar 4 mm 254 mm
Alloy 718 sheet & plate 0.25 mm 76.2 mm
Alloy 718 welding wire 0.5 mm 2.36 mm

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    Welding Consumables

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    Sheet & Plate

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    Round Bar

Chemical Analysis

% Ni+Co Cr Mo Cu Co C Mn Si P S Fe Ti Al Nb+Ta
Min 50 17 2.8 0 0 0 0 0 0 0 Balance 0.65 0.2 4.75
Max 55 21 3.3 0.3 1 0.08 0.35 0.35 0.015 0.015 Balance 1.15 0.8 5.5


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Perfect for applications in the Aerospace industry

Alloy 718 can be used in a variety of applications including:

  • Gas turbine engine parts
  • Liquid fuel rocket motor components
  • Springs, fasteners
  • Cryogenic tanks
  • Pumps and valves
  • Tooling

About Alloy 718

Alloy 718, often referred to as Inconel 718, is precipitation hardened to give maximum strength and high creep-stress rupture strength. The alloy can be supplied in the annealed condition to enhance machinability followed by subsequent appropriate heat treatments. Capability tests are completed on test samples which have had the precipitation hardening process completed.

Alloy 718/Inconel 718, demonstrates outstanding weldability including resistance to post-weld cracking.

The major applications are components for gas turbines, aircraft engines, fasteners and other high strength applications. Its available in round bar, wire and sheet and plate.

For more information on Nickel Alloy 718, or to get a quote contact us or fill in our online quote form.


8.193 g/cm³
Melting range:


UNS Number:
Werkstoff Number:
ASTM B637, B670, AMS 5596, 5662, 5663, 5832
Download the Alloy 718 Data Sheet Download

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