Starting cutting speed in m/min and sfm, feed in mm/rev and ipr, the carbide grade class and the setup by operation for 17-4 PH (X5CrNiCuNb16-4). The numbers are the published M30 PH stainless (17-4PH) sub-group starting band; the designations are on the cross-reference page.
| Item | Value |
|---|---|
| ISO 513 group | M Stainless steel |
| Sub-group | M30 PH stainless (17-4PH) |
| Sub-group hardness / condition | 28–44 HRC |
| Category | Precipitation-hardening stainless |
| EN / Werkstoffnummer | X5CrNiCuNb16-4 · 1.4542 |
Hardness is the range published for the whole M30 PH stainless (17-4PH) sub-group on our material guide; the delivery condition of your 17-4 PH may sit anywhere inside it or outside it.
| Condition | Vc m/min | Vc sfm | Feed mm/rev | Feed ipr |
|---|---|---|---|---|
| Solution annealed | 100–160 | 330–525 | 0.10–0.25 | .004–.010 |
| Aged (H900) | 80–120 | 260–395 | 0.10–0.25 | .004–.010 |
Sub-group starting values for carbide inserts, from M30 PH stainless (17-4PH). They describe the whole sub-group and are not tuned to 17-4 PH. 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 M group range.
| Operation | Geometry | Coating family | Coolant | First check |
|---|---|---|---|---|
| Roughing | Positive honed edge, rigid setup | PVD-coated M-class carbide; harder, more wear-resistant grade for aged H900 / H1025 | High-pressure coolant | Heat-treat condition: annealed versus aged drives grade and speed |
| Finishing | Positive honed edge | PVD-coated M-class carbide | High-pressure coolant | Built-up edge: raise Vc into the band, coolant at the edge |
| Interrupted cut | Positive honed edge, rigid setup | Tougher PVD-coated carbide | High-pressure coolant | Edge chipping on aged material |
| Low rigidity / thin wall | Positive honed edge; rigid setup, short overhang | PVD-coated M-class carbide | High-pressure coolant | Work-hardening: keep DOC above the hardened layer, never dwell |
Setup rows are the selection table of the M30 PH stainless (17-4PH) guide. They carry no speeds, so they do not change the starting band above.
PVD-coated M-class carbide for solution-annealed 17-4PH (~28–33 HRC). For aged H900 / H1025 (~40–44 HRC), use a harder, more wear-resistant grade and lower the speed.
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 M grade list and in the grade chart.
EN X5CrNiCuNb16-4, Werkstoffnummer 1.4542, US AISI 630 (UNS S17400), JIS SUS630. The full table, with the nearest-match flags, is on the 17-4 PH / 1.4542 cross-reference page.
Condition decides everything: solution-annealed it cuts like a tough martensitic, H900 it fights back hard. Machine before ageing where the drawing allows.
Are you overpaying on your 17-4 PH 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.
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The published starting band for the M30 PH stainless (17-4PH) sub-group is Solution annealed 100–160 m/min (330–525 sfm) at 0.10–0.25 mm/rev (.004–.010 ipr); Aged (H900) 80–120 m/min (260–395 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 17-4 PH, so confirm on a sample part and adjust for condition, tool and rigidity.
PVD-coated M-class carbide for solution-annealed 17-4PH (~28–33 HRC). For aged H900 / H1025 (~40–44 HRC), use a harder, more wear-resistant grade and lower the speed. 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 X5CrNiCuNb16-4 (Werkstoffnummer 1.4542); US: AISI 630 (UNS S17400); JIS: SUS630. 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.