30CrNiMo8 is the same material your supplier may list as AISI 4330. This page maps the designations across standards and gives the ISO P-group machining starting point, brand-neutral.
| System | Designation |
|---|---|
| EN (EU) | 30CrNiMo8 |
| Werkstoffnummer | 1.6580 |
| AISI / ASTM / UNS (US) | AISI 4330 (nearest) |
| 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.
At least one designation on this page is a nearest commonly-cited counterpart rather than a same-composition equivalent (structural and cast grades are specified by properties, not chemistry). Confirm suitability against the material certificate and the drawing requirement, not this table alone.
High-strength CrNiMo shaft steel, usually cut quenched and tempered: tough, stringy, hot. Treat like 34CrNiMo6 at the tough end of the P range with stable chip control.
| ISO group | Starting Vc (coated carbide, turning) | Feed fn |
|---|---|---|
| P P · Steel | 150–350 m/min · 490–1150 sfm | 0.1–0.5 mm/rev · .004–.020 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 P · Alloy steel (CrNiMo).
Related materials: 42CrMo4 / AISI 4140 · 25CrMo4 / AISI 4130 · 34CrNiMo6 / AISI 4340 · 100Cr6 / AISI 52100 · 51CrV4 / AISI 6150 · 31CrMoV9 / 1.8519
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30CrNiMo8 (Werkstoffnummer 1.6580) corresponds to AISI 4330 (nearest) as the nearest commonly-cited counterpart — check the certificate before substituting.
It is an ISO P-group material, so the starting window is 150–350 m/min · 490–1150 sfm at 0.1–0.5 mm/rev · .004–.020 ipr for coated-carbide turning, adjusted for condition and operation. For a grounded, brand-neutral pick — grade, geometry and cutting data across 13 brands — ask the advisor.
Not automatically: this pairing is nearest-by-properties, and structural or cast grades are specified by mechanical requirements. The drawing standard and the material certificate decide, not the cross-reference table.
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.