DESCRIPTION
Inconel 718 is an age-hardenable Nickel-Chromium-Columbium (Niobium)-Molybdenum alloy with high strength, corrosion-resistance, and good fabrication characteristics. Inconel 718 has high tensile, yield, and creep-rupture properties at high temperatures and can operate at cryogenic temperatures up to 1200°F (650°C).
Applicable Specifications
Wire & Bar:
AMS 5662, AMS 5663, AMS 5664, AMS 5832, AMS 5962, ASME SB-637, ASTM B637, AWS A5.14, NACE MR0175 (ISO 15156-3).
Applications
Springs, valves, and aircraft and land-based turbine engines.
Industries Supplied
Oil & Gas Extraction, Nuclear, Aerospace, Defense and Automotive.
Nominal Composition
Ni: 50.0 – 55.0
Cr: 17.0 – 21.0
Cb (Nb): 4.75 – 5.5
Mo: 2.8 – 3.3
Ti: 0.65 – 1.15
Fe: balance
Co: 1.0 max
Al: 0.2 – 0.8
Mn: 0.35 max
Si: 0.35 max
Cu: 0.3 max
Physical Properties
Density:
0.296 lb/in3, (8.19 g/cm3)
Modulus of Elasticity (E):
At 70°F (20°C): 29.0 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 300°C)
Electrical Resistivity:
47.5 µΩ.in, (121 µΩ.cm)
Thermal Conductivity:
79 Btu-in/ft2hr-°F, (11.4 W/m-K)
Typical Mechanical Properties – Spring Applications
Annealed
- Heat Treatment: 1800°F (980°C)
- Tensile Strength: 115 – 145 ksi; (790-1000 MPa)
- Suggested Operating Conditions: -330°F to 1200°F (-200°C to 650°C)
Spring Temper
- Tensile Strength: 190 – 220 ksi; (1310 – 1515 MPa)
- Suggested Operating Conditions: -330°F to 1200°F (-200°C to 650°C)
Spring Temper + Aged
- Heat Treatment: After spring coiling. Age: 1325°F (720°C) for 8 hours, furnace cool to 1150°F and hold for a total aging time of 18 hours.
- Tensile Strength: 220 ksi minimum; (1515 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: 1.847.695.1900
Elgiloy Specialty Metals – Wire Products
356 N.Cross Street
Sycamore, IL 60178 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 Company LLC, 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 Company LLC, 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 Company LLC, be liable for any damages whatsoever arising from the use of the information included in the data sheets.
