ASTM B670 UNS N07718, Inconel 718 Strip, Inconel UNS N07718 Plate

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)