NiCr22Mo9Nb (Alloy 625) is the same material your supplier may list as UNS N06625. This page maps the designations across standards and gives the ISO S-group machining starting point, brand-neutral.
| System | Designation |
|---|---|
| EN (EU) | NiCr22Mo9Nb (Alloy 625) |
| Werkstoffnummer | 2.4856 |
| AISI / ASTM / UNS (US) | UNS N06625 |
| JIS (Japan) | — |
Compiled from the public standard designation systems (EN 10027, SAE/AISI, ASTM, UNS, JIS). Entries marked “nearest” are the closest commonly-cited counterpart, not a drop-in equivalent. Always verify against the material certificate.
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.
| ISO group | Starting Vc (coated carbide, turning) | Feed fn |
|---|---|---|
| S S · Nickel superalloy | 15–50 m/min · 50–165 sfm | 0.1–0.25 mm/rev · .004–.010 ipr |
Group-level starting range from our speeds & feeds guide; convert to RPM with the speeds & feeds calculator. Condition, subgroup and operation shift the number — the material page has the detail: ISO S · Nickel superalloy.
Related materials: Inconel 718 / 2.4668 · Monel 400 / 2.4360 · Hastelloy C-276 / 2.4819 · Alloy 20 / 2.4660 · Nimonic 80A / 2.4952 · Incoloy 825 / 2.4858
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NiCr22Mo9Nb (Alloy 625) (Werkstoffnummer 2.4856) corresponds to UNS N06625.
It is an ISO S-group material, so the starting window is 15–50 m/min · 50–165 sfm at 0.1–0.25 mm/rev · .004–.010 ipr for coated-carbide turning, adjusted for condition and operation. For a grounded, brand-neutral pick — grade, geometry and cutting data across 15 brands — ask the advisor.
They designate the same composition under different systems, but the drawing standard governs: certificates, tolerances and delivery-condition requirements differ between standards even for equivalent chemistry. Substitute only with the certificate in hand.
Knowing the material is half the job; picking the grade and cutting data for the operation is the other half. That is what the advisor does, grounded in catalog data and honest when there is no verified match.