Precipitation-hardenable nickel-chromium superalloy that holds high strength and corrosion resistance to ~700 °C — for turbine, exhaust, rocket and oil-and-gas hardware.
IN718Inconel 718 is a precipitation-hardenable nickel-chromium superalloy strengthened by niobium and molybdenum, retaining high strength, creep resistance and oxidation resistance up to ~700 °C. Printed fully dense by LPBF, it is solution-treated and double-aged (AMS 5663) to develop full properties; HIP is available for fatigue-critical flight hardware. The default alloy for turbine, exhaust, rocket and downhole components that must perform hot.
| Property | As-built | Aged | 650 °C |
|---|---|---|---|
| UTS (MPa) | ~1,010 | ~1,350 | ~1,000 |
| Yield Rp0.2 (MPa) | ~660 | ~1,150 | ~860 |
| Elongation (%) | ~25 | ~16 | ~18 |
| Hardness (HRC) | ~30 | ~44 | — |
| Modulus (GPa) | ~200 | ~200 | ~180 |
| Property | Value | Unit |
|---|---|---|
| Density | 8.19 | g/cm³ |
| Melting range | ~1,260-1,340 | °C |
| Thermal conductivity | ~11 | W/m·K |
| Max service temp | ~700 | °C |
| Powder PSD | 15-45 | µm |
| Composition | Ni50-55·Cr17-21·Fe·Nb5·Mo3 | wt% |