INCONEL® alloy 718 Strip (Nickel Alloy 718) Coil, Foil to AMS 5596, AMS 5597, ASTM B670, UNS N07718, W.Nr. 2.4668

UNS N07718
W.Nr 2.4668


INCONEL® alloy 718 strip combines properties that make it suitable for a variety of fabricated component applications in both aircraft turbine engines and land-based turbines. These include seals, bellows, and many types of stamped metal components. The alloy is used in downhole and wellhead components for oil and gas wells.


INCONEL® Alloy 718 is an age-hardenable Nickel-Chromium-Columbium (Niobium)-Molybdenum alloy with high strength, corrosion-resistance, and good fabrication characteristics. INCONEL® Alloy 718 has high tensile, yield, and creep-rupture properties at high temperatures up to 1200°F (650°C).

Industries Supplied

Oil & Gas Extraction, Nuclear, Aerospace, Defense and Automotive.

Nominal Composition

C: 0.08 max
Mn: 0.35 max
Si: 0.35 max
P: 0.015 max
S: 0.015 max
Cr: 17.0 – 21.0
Ni: 50.0 – 55.0
Mo: 2.80 – 3.30
Nb: 4.75 – 5.50
Ti: 0.65 – 1.15
Al: 0.20 – 0.80
Co: 1.0 max
Fe: Balance

Physical Properties

Density: 0.296 lb/in3, (8.19 g/cm3)

Modulus of Elasticity (E):
At 70°F (20°C): 29 x 103 ksi (200 GPa)

Modulus of Rigidity (G)
At 70°F (20°C):  11.6 x 103 ksi (80 GPa)

Coefficient of Expansion:
7.7 µin/in.-°F (70°F to 600°F)
13.9 µm/m-°C (20°C to 538°C)

Electrical Resistivity: 47.5 µΩ.in, (121 µΩ.cm)

Thermal Conductivity: 79 Btu-in/ft2hr-°F, (11.4 W/m-K)

Applicable Specifications

Strip and Foil: AMS 5596, AMS 5597, ASTM B670

Typical Mechanical Properties

  • Annealed
    • Heat Treatment: 1800°F (980°C)
    • Tensile Strength: 120 – 140 ksi (830 – 965 MPa)
    • Suggested Operating Conditions: -330°F to 1200°F (-200°C to 650°C)
  • Spring Temper
    • Tensile Strength: 180 – 230 ksi (1240 – 1585 MPa)
    • Suggested Operating Conditions: -330°F to 1200°F (-200°C to 650°C)
  • After Precipitation Heat Treat
    • Heat Treatment: Per AMS 5596
    • Tensile Strength: 190 – 240 ksi (1310 – 1655 MPa)
    • Suggested Operating Conditions: -330°F to 1200°F (-200°C to 650°C)

INCONEL® is a registered trademark of the Special Metals Corporation group of companies.

For further information Contact:

Contact Us
Phone: 1 888 843 2350
Elgiloy Specialty Metals – Strip Products
1565 Fleetwood Dr.
Elgin, IL 60123 USA

Limitation of Liability and Disclaimer of Warranty:

  • The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only.  It is not intended for engineering or design.
  • Applications may be discussed, however, Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., does not recommend or endorse any material for any particular end use or application.
  • The data included in this data sheet are typical values and may vary.
  • Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.

In no event will Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., be liable for any damages whatsoever arising from the use of the information included in the data sheets.

Additional Information on INCONEL® Alloy 718

No matter if you are producing springs, valves, or other components for a machine that will experience extremely high temperatures, INCONEL® Alloy 718 strip is one of the most highly sought-after alloys by professionals in the industry. Turbine engines and aircraft are the most common places where this alloy can be found, but it is very useful for many different types of machinery. At Elgiloy, we provide INCONEL® Alloy 718 for our customers who are looking for peak performance in extreme conditions.

INCONEL® Alloy 718 strip is a precipitation hardened, Nickel-based, super alloy that can withstand extreme temperatures both in the hot and cold end of the spectrum. It is made up of mainly Nickel, Chromium, and Columbium, with trace amounts of other elements. It is very strong, corrosion resistant, and maintains great fabrication characteristics.  Perhaps the most useful characteristic of INCONEL® Alloy 718 is its performance at very high temperatures. It is resistant to creeping and has a high rupture strength threshold. While it may seem that it would be difficult to weld due to its durability in hot temperatures, the poor age hardening response of the alloy allows for relatively easy weldability especially using a gas tungsten arc welder.

As stated before, INCONEL® Alloy 718 can be easily welded and will not toughen or crack during the process. This is also true during extremely frigid temperatures, down to even -400 degrees, where this alloy maintains its strength and performance. Once heat processing begins, INCONEL® Alloy 718 will age harden. This shows the extreme versatility of this alloy as a whole. No matter if you are using it or processing it in very hot or very cold temperatures, it will still operate at peak performance. INCONEL® Alloy 718 strip can also be roll threaded only after full aging using induction heat and without increasing the size of the grain.

When you are shaping or machining INCONEL® Alloy 718, be aware that the quick work hardening of the alloy makes using conventional methods much more complicated. After the initial machining pass, deformation can occur in either the alloy or your tool because of work hardening for the next subsequent passes. This is why most use a hostile and mild cut hard tool when it is machined, mainly because it limits the amount of passes necessary to complete the process. Ultimately, it is best to machine the alloy in a solution form. This way only the final steps are necessary followed by age hardening. If you are cutting a plate of INCONEL® Alloy 718, consider using a waterjet cutter, or selective laser melting, even just for the INCONEL® Alloy 718 components.

At Elgiloy, we offer our customers INCONEL® products because of their outstanding track record among professionals in many different industries. The INCONEL® Alloy 718 strip is no exception. At extremely competitive prices, it is absolutely worth making sure that you can trust the materials you are working with to ensure that you will spend less time maintaining your equipment, and more time doing your job efficiently. Whether you are working on a jet engine, or any other piece of equipment that will experience extremely high temperatures, INCONEL® Alloy 718 is the alloy for you.