Material datasheet · Ni-Cr-Fe-Nb superalloy
Inconel 718
UNS N07718 · Solution treated and aged (STA): 1750°F + 1325°F + 1150°F double age
Nickel superalloy. Holds strength to 1300°F. Standard for jet-engine hot-section parts.
Chemical composition
Nominal % by weight.
| Element | % by wt |
|---|---|
| Ni | 50–55 |
| Cr | 17–21 |
| Fe | Bal. |
| Nb | 4.75–5.5 |
| Mo | 2.8–3.3 |
| Ti | 0.65–1.15 |
| Al | 0.20–0.80 |
Applicable specifications
AMS / ASTM / MIL.
- AMS 5662
- AMS 5663 (bar STA)
- AMS 5596 (sheet)
- ASTM B637
Maintain dimensional stability with full STA cycle. Used for 1300°F continuous service.
Machining guidance
CNC parameters and tooling.
Whisker-reinforced ceramic for roughing; coated carbide for finishing; ceramic for high MRR
Workhardens severely. Constant feed, no dwell, light DOC on finish; ceramic tools for roughing run 5-10× faster than carbide.
Stock & cost
Forms and Q1 2026 pricing.
- Passivate
- Black oxide (limited)
- Shot peen for fatigue
Typical applications
Where Inconel 718 is the right pick.
- Jet engine combustors
- Turbine disks
- Liquid rocket engines
- Cryogenic vessels
- Oil & gas downhole
Alternative materials
Substitute or upgrade options.
- Inconel 625 (lower strength, better corrosion)
- Waspaloy (1500°F)
- Rene 41 (higher T)
Digital Machine · Quick-Turn CNC · California
Machine your part in Inconel 718.
Production CNC milling and turning. Confirm material, inspection and documentation requirements when requesting a quote.
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Related tools & references
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