Superalloys & titanium · ISO S
Inconel 718 speeds and feeds
Also: Alloy 718, 2.4668, N07718
Starting points from the same engines as the calculators, with no tool or setup picked. The first number is where to start; the range is what the manufacturer charts allow. Open a calculator for your tool, machine and cut.
Draft data: researched from manufacturer charts, not yet reviewed by a machinist.
Machining notes
- Work hardens fast and holds heat: low speed, constant engagement, never rub. Expect notch wear at the depth-of-cut line.
Solution annealed250 HB
Turning
| Cut | SFM | Feed, IPR | Depth, in |
|---|---|---|---|
| Finishing | 15678–29348 m/min | 0.0050.003–0.0070.12 mm/rev | 0.0220.004–0.0400.6 mm |
| Medium | 13166–24640 m/min | 0.0090.005–0.0130.22 mm/rev | 0.0850.012–0.1582.2 mm |
| Roughing | 12362–23138 m/min | 0.0110.007–0.0160.28 mm/rev | 0.1490.060–0.2373.8 mm |
For a PVD carbide insert, general stability, 15 min tool life.
Milling, solid carbide end mill
Speed 70 (40–100) SFM · 21 m/min
| Cutter Ø | IPT | mm/tooth |
|---|---|---|
| 1/8" | 0.00050.0004–0.0005 | 0.011 |
| 1/4" | 0.00110.0010–0.0012 | 0.028 |
| 1/2" | 0.0020 | 0.051 |
| 3/4" | 0.0030 | 0.076 |
| 1" | 0.00350.0030–0.0040 | 0.089 |
Drilling, Ø1/2" at 3×D
| Drill | SFM | Feed, IPR |
|---|---|---|
| HSS | Not enough published data yet: 2 drill makers give an HSS speed for nickel superalloys, and this site needs 3. Use a cobalt or carbide drill, which 3 or more makers cover. | |
| Cobalt | 2220–35 | 0.00330.0030–0.0035 |
| Solid carbide, through-coolant | 11870–165 | 0.0030 |
Feeds scale with drill Ø (0.5" here): the drilling calculator sets them for yours.
Tapping
- Cut tap
- 58 (49–66) SFM
- Form tap
- No sourced form tapping speed for heat-resistant superalloys yet
Aged350 HB
Turning
| Cut | SFM | Feed, IPR | Depth, in |
|---|---|---|---|
| Finishing | 11256–20934 m/min | 0.0050.003–0.0070.12 mm/rev | 0.0220.004–0.0400.6 mm |
| Medium | 9447–17629 m/min | 0.0090.005–0.0130.22 mm/rev | 0.0850.012–0.1582.2 mm |
| Roughing | 8844–16527 m/min | 0.0110.007–0.0160.28 mm/rev | 0.1490.060–0.2373.8 mm |
For a PVD carbide insert, general stability, 15 min tool life.
Milling, solid carbide end mill
Speed 70 (40–100) SFM · 21 m/min
| Cutter Ø | IPT | mm/tooth |
|---|---|---|
| 1/8" | 0.00050.0004–0.0005 | 0.011 |
| 1/4" | 0.00110.0010–0.0012 | 0.028 |
| 1/2" | 0.0020 | 0.051 |
| 3/4" | 0.0030 | 0.076 |
| 1" | 0.00350.0030–0.0040 | 0.089 |
Drilling, Ø1/2" at 3×D
| Drill | SFM | Feed, IPR |
|---|---|---|
| HSS | Not enough published data yet: 2 drill makers give an HSS speed for nickel superalloys, and this site needs 3. Use a cobalt or carbide drill, which 3 or more makers cover. | |
| Cobalt | 2220–35 | 0.00330.0030–0.0035 |
| Solid carbide, through-coolant | 11870–165 | 0.0030 |
Feeds scale with drill Ø (0.5" here): the drilling calculator sets them for yours.
Tapping
- Cut tap
- 58 (49–66) SFM
- Form tap
- No sourced form tapping speed for heat-resistant superalloys yet
Sources
- Sandvik Coromant — Workpiece materials (MC codes, kc1, mc)
- Kennametal — Turning Inserts, Carbide, RP geometry: starting speeds and feeds
- Mitsubishi Materials USA — Optimum Grades and Chip Breakers for External Turning
- Harvey Tool — General machining guidelines, carbide end mills (SFM and chip load by diameter)
- 6G Tools — Carbide end mill speeds and feeds, general purpose, uncoated (incl. chip load factor)
- Kennametal — HARVI I TE: 5% radial / 2×D axial dynamic milling, 60% / 1.75×D side milling
- Uddeholm — Impax HiHard machining data: slot milling axial depth ≤ 1 × D
- Sandvik Coromant — Formulas and definitions for milling (net power)
- ISCAR — Machining titanium: average chip thickness hm = fz√(ae/d) at light engagement
- Redline Tools — Cobalt & HSS drills (p. 340) and coolant-fed solid carbide drills (p. 328): speeds and feeds
- Hertel (MSC) — High speed steel & cobalt drills: speeds and feeds
- YG-1 — HSS & cobalt drill parameters, and Carbide Dream Drills technical information
- Redline Tools — Cobalt & HSS drills: speeds and feeds (catalog p. 340)
- Viking Drill & Tool — Recommended speeds and feeds for HSS drills
- Sandvik Coromant — Drilling formulas and definitions (net power)
- Ingersoll — WinTwist exchangeable-head drills: operating guidelines (NEW-393-2, pp. 9–10)
- Walter Titex — Technical compendium, holemaking 2024: cutting data for solid carbide drills
- Tru-Edge — Solid carbide drills: feeds and speeds
- YG-1 — Carbide Dream Drills: technical information (speeds, feeds, depth factors)
- OSG — HY-PRO and HY-PRO NRT taps: recommended tapping conditions