Inconel Alloy 718 Coil & Strip
UNS N07718
W.Nr 2.4668
Applications
Alloy 718 combines properties which 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.
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 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)
