Inconel 718 flat washers are useful in extreme environments that require oxidation and corrosion resistant washers, even when subjected to pressure and heat.

Inconel 718, also known as Alloy 718, is twice as strong as Inconel 625. It is incredibly corrosion resistant and used at -423°F to 1300°F. This makes it useful for gas engine turbines and cryogenic tanks.

Additionally, due to their nickel-chromium content, Inconel 718 flat washers have excellent resistance even when combating chloride-ion stress-corrosion cracking. The addition of molybdenum to the alloy helps prevent pitting.

Inconel 718 has also been precipitation hardened. The heating and quenching process is used to change the alloy’s atomic structure, making it stronger by locking the metal’s grain structure in place.

Inconel 718 Characteristicsinconel 718 flat washers

  • Holds strength from -423° to 1300°F
  • Easily fabricated
  • Excellent creep and stress rupture strength
  • Good ductility to 1300°F
  • Good resistance to many inorganic and organic compounds in a wide range of acidity and alkalinity
  • Withstands sulfur compounds and mild oxidizing media
  • Highly resistant to chloride and sulfide stress corrosion cracking
  • Excellent resistance to H2S, CO2, chloride and sour gas environments
  • Resistant to aqueous corrosion


  • Aircraft
  • Rocket components
  • Power generation turbines
  • Nuclear reactors
  • Gas engine turbines
  • Cryogenic tanks
  • Liquid fueled rockets
  • Aircraft
  • Jet engines
  • Oil and gas drilling
  • Natural gas processing
  • Aerospace
  • Down-hole oil shafts and wellheads
  • Chemical processing
  • Steam generators
  • Nuclear pressurized water reactors


We offer washers to the specific dimensions that you need. Special sizes can be made to order. We offer off-the-shelf sizing ranging from 0.062 to 12 inch inside diameter and thicknesses from 0.002 to ½ inch.

Standard line:

  • USS
  • SAE
  • Fender washers
  • Special sizes can be manufactured

Metric line:

  • Din 125 A/B flat washers
  • Din 433 small series flat washers
  • Din 9021 fender washers
  • Special sizes can be manufactured 

Whatever Inconel 718 flat washer you’re looking for, if we don’t have it on our shelf, we can quickly manufacture if for you. Our washer capabilities range from small (under 100 pieces) to large runs. We will custom make your Inconel 718 flat washers to your exact specifications. Contact us today by calling 1-800-736-5014 or filling out our contact form.