Inconel 718 is a precipitation-harden able, nickel-chromium alloy containing also-significant amounts of iron, niobium and molybdenum, along with lesser amounts of aluminum and titanium. It combines corrosion resistance and high strength with outstanding weld ability, including resistance to post weld cracking. Inconel 718 has excellent creep-rupture strength at temperatures to 1300°F (700°C). Inconel 718 is used in gas turbines, rocket motors, space-craft, nuclear reactors, pumps and tooling. Standard product forms are round, flats, extruded section, pipe, tube, forging stock, plate, sheet, strip and wire.
Unit of Measure



N/A Inconel®


N/A Sheets


N/A 0.093 inches2.3622 mm

Nickel Alloy Compositions


N/A Inconel® 718

Basic Composition

N/A 18.0% Chrominum 18.5% Iron 3.0% Molybdenum 5.0% Niobium 54.0% Nickel


N/A 0.296 lbs/in³8.19 g/cm³

ASTM Specification

N/A ASTM B670 SAE 5596 SAE 5597 UNS N07718

Typical Mechanical Properties

Melting Temperature Range

N/A 2300 to 2437 ºF1260 to 1336 ºC

Rupture Strength (1000 h at 1100°F/595°C)

N/A 110000 psi760 MPa

Rupture Strength (1000 h at 1200°F/650°C)

N/A 86000 psi590 MPa

Rupture Strength (1000 h at 1300°F/705°C)

N/A 53000 psi370 MPa

Rupture Strength (1000 h at 1400°F/760°C)

N/A 24000 psi170 MPa