Starting cutting speed in m/min and sfm, feed in mm/rev and ipr, the carbide grade class and the setup by operation for Inconel 625 (NiCr22Mo9Nb). The numbers are the published S20 Nickel superalloys (Inconel 718) sub-group starting band; the designations are on the cross-reference page.
| Item | Value |
|---|---|
| ISO 513 group | S Superalloys and titanium |
| Sub-group | S20 Nickel superalloys (Inconel 718) |
| Sub-group hardness / condition | 280–380 HB |
| Category | Nickel superalloy |
| EN / Werkstoffnummer | NiCr22Mo9Nb (Alloy 625) · 2.4856 |
Hardness is the range published for the whole S20 Nickel superalloys (Inconel 718) sub-group on our material guide; the delivery condition of your Inconel 625 may sit anywhere inside it or outside it.
| Condition | Vc m/min | Vc sfm | Feed mm/rev | Feed ipr |
|---|---|---|---|---|
| S20 Nickel superalloys (Inconel 718), 280–380 HB | 20–45 | 65–150 | 0.10–0.25 | .004–.010 |
Sub-group starting values for carbide inserts, from S20 Nickel superalloys (Inconel 718). They describe the whole sub-group and are not tuned to Inconel 625. sfm and ipr are converted from the metric values (1 m/min = 3.281 sfm, 25.4 mm = 1 in). The published band is per sub-group, not per operation; the table below gives the setup by operation. Convert Vc to spindle speed with the speeds & feeds calculator, and see the speeds & feeds guide for the ISO S group range.
| Operation | Geometry | Coating family | Coolant | First check |
|---|---|---|---|---|
| Roughing | Positive but strong, honed edge; round or large-nose insert spreads heat | Tough fine-grain PVD carbide; whisker-reinforced or SiAlON ceramic for high-speed roughing of aged 718 | High-pressure coolant essential | Depth-of-cut notch wear: vary DOC between passes |
| Finishing | Positive, honed edge; avoid fragile sharp corners | Tough fine-grain PVD carbide | High-pressure coolant essential | Rapid cratering and heat: coolant to the edge, hold Vc in band |
| Interrupted cut | Strong honed edge, round insert where possible | Tough fine-grain PVD carbide | High-pressure coolant essential | Edge chipping or built-up edge: sharp honed positive edge |
| Low rigidity / thin wall | Positive but strong edge; keep the tool moving | Tough fine-grain PVD carbide | High-pressure coolant essential | Work-hardened skin: keep DOC above the hardened layer |
Setup rows are the selection table of the S20 Nickel superalloys (Inconel 718) guide. They carry no speeds, so they do not change the starting band above.
Same sub-group, same starting band: Inconel 718 · Waspaloy
Tough fine-grain PVD carbide for general work; whisker-reinforced or SiAlON ceramic for high-speed roughing of aged 718, which runs in a separate, much higher speed regime.
The P, M, K, N, S or H number inside a grade range describes what the grade is built for, not the workpiece sub-group number, and the two scales must not be matched to each other. We name no single grade here: none of our published sources ties a named grade to this alloy. Pick by ISO class, then compare what the makers publish on the ISO S grade list and in the grade chart.
EN NiCr22Mo9Nb (Alloy 625), Werkstoffnummer 2.4856, US UNS N06625. The full table, with the nearest-match flags, is on the Inconel 625 / 2.4856 cross-reference page.
Gummier and stickier than 718 rather than harder: expect built-up edge and depth-of-cut notching. Sharp positive S-geometry and steady feed beat brute toughness.
Are you overpaying on your Inconel 625 inserts? Paste your insert list and get a cost audit in about 30 seconds: cross-brand equivalents at the same ISO application position, and where you are likely overpaying. No signup, no sales call.
After the free check: a sourced PDF + XLSX report from about USD 10 (EUR 9) per grade. How buying works
The published starting band for the S20 Nickel superalloys (Inconel 718) sub-group is 20–45 m/min (65–150 sfm) at 0.10–0.25 mm/rev (.004–.010 ipr). It is a starting band for the whole sub-group, not a value tuned to Inconel 625, so confirm on a sample part and adjust for condition, tool and rigidity.
Tough fine-grain PVD carbide for general work; whisker-reinforced or SiAlON ceramic for high-speed roughing of aged 718, which runs in a separate, much higher speed regime. Pick the grade by ISO class rather than by brand name, then confirm the exact grade for your condition. We name no single grade here because none of our published sources ties a named grade to this alloy.
EN NiCr22Mo9Nb (Alloy 625) (Werkstoffnummer 2.4856); US: UNS N06625; JIS: none listed. Entries marked nearest are the closest commonly-cited counterpart, not a same-composition equivalent.
The advisor compares what the makers publish for your material and operation and shows the source behind each answer, or tells you it could not verify.