VT machining offers CNC Milling for Inconel 718 (UNS N07718 / 2.4668), typically supplied solution-treated or aged. Precipitation-hardened superalloy; strongest of the common Inconels to ~650 °C.
CNC Milling Notes for Inconel 718
We use high-efficiency toolpaths with constant engagement on Inconel 718 to keep cutting temperature and tool wear under control.
For estimating, a 100 × 100 × 10 mm block of Inconel 718 weighs about 0.82 kg.
Starting Parameters for CNC Milling Inconel 718
| Cutting speed (carbide) | 10-30 m/min |
|---|---|
| Feed per tooth | 0.018-0.053 mm |
| Spindle speed, Ø10 mm end mill | 320-950 rpm |
| Insert / tool class | ISO H — CBN or fine-grain carbide |
| Coolant | High-pressure emulsion; ceramic inserts run dry for roughing |
| Thermal growth, 100 mm part, +10 °C | 13 µm (CTE 13 µm/m·K) |
Starting values for Inconel 718, Solution-treated or aged; optimised on the first article.
Inconel 718 Data Relevant to CNC Milling
| Equivalent designations | UNS N07718 / 2.4668 |
|---|---|
| Key composition | Ni 50-55%, Cr 17-21%, Nb 4.75-5.5%, Mo |
| Typical supply condition | Solution-treated or aged |
| Hardness (typical) | Up to ~40-45 HRC aged |
| Machinability rating | 10% (AISI B1112 = 100%) |
Typical values; we work to your drawing and mill certificate.
How Inconel 718 Differs
Precipitation-hardened superalloy; strongest of the common Inconels to ~650 °C.
Typical applications: Turbine discs, fasteners, oil & gas tools.
Inconel 718 vs Similar Grades
| Inconel 718 | Inconel 625 | Incoloy 800 | Inconel 600 | |
|---|---|---|---|---|
| Key composition | Ni 50-55%, Cr 17-21%, Nb 4.75-5.5%, Mo | Ni ≥58%, Cr 20-23%, Mo 8-10%, Nb 3.15-4.15% | Ni 30-35%, Cr 19-23%, Fe bal. | Ni ≥72%, Cr 14-17%, Fe 6-10% |
| Hardness | Up to ~40-45 HRC aged | ~95 HRB-25 HRC | ~75-85 HRB | ~75-90 HRB |
| Tensile (MPa) | ~1240-1400 aged | ~830-930 | ~600 | ~620 |
| Machinability % | 10 | 12 | 20 | 15 |
| Typical use | Turbine discs, fasteners, oil & gas tools | Marine, aerospace ducting, chemical | Heat exchangers, furnace parts | Furnace parts, heat-treat fixtures, nuclear |
More on CNC Milling Inconel
Finishing options, quality documentation and general cnc milling guidance for all inconel grades are on our CNC Milling Inconel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Milling Inconel 718
Send a STEP/IGES model or PDF drawing, confirm Inconel 718 and its condition (we usually see it supplied solution-treated or aged), the quantity, critical tolerances and any finish or certificate requirements.
Inconel 718 in Other Processes
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Send the drawing, the Inconel 718 condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Which industries use CNC Milling Inconel 718 parts?
CNC Milling Inconel 718 parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise Inconel 718 components are required.
What tolerances can you hold for CNC Milling Inconel 718?
Achievable tolerances for Inconel 718 machining depend on the alloy, geometry and feature size. Milling holds positional and dimensional tolerances to around ±0.01 mm, tighter with precision setups. Exact figures are confirmed against your drawing callouts.
Can VT machining make custom Inconel 718 parts to my drawing?
Yes. Inconel 718 machining is made to order from your CAD/2D drawing. Share your geometry, material grade, tolerance and quantity and we will confirm feasibility, lead time and pricing.
What is CNC Milling Inconel 718 and how is it done?
CNC Milling Inconel 718 refers to multi-axis milling cutters remove material to produce prismatic features, pockets, slots and contoured 3D surfaces. Applied to Inconel 718 — high-temperature strength and oxidation resistance — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.