Starting cutting speed in m/min and sfm, feed in mm/rev and ipr, the carbide grade class and the setup by operation for 11SMn30 (W.-Nr. 1.0715). The numbers are the published P40 Free-cutting steel sub-group starting band; the designations are on the cross-reference page.
| Item | Value |
|---|---|
| ISO 513 group | P Steel |
| Sub-group | P40 Free-cutting steel |
| Sub-group hardness / condition | 160–230 HB |
| Category | Free-cutting steel |
| EN / Werkstoffnummer | 11SMn30 · 1.0715 |
Hardness is the range published for the whole P40 Free-cutting steel sub-group on our material guide; the delivery condition of your 11SMn30 may sit anywhere inside it or outside it.
At least one designation of this material is a nearest commonly-cited counterpart, not a same-composition equivalent. The machining values below belong to the sub-group, so confirm the actual alloy and delivery condition on the material certificate.
| Condition | Vc m/min | Vc sfm | Feed mm/rev | Feed ipr |
|---|---|---|---|---|
| P40 Free-cutting steel, 160–230 HB | 200–350 | 655–1150 | 0.10–0.40 | .004–.016 |
Sub-group starting values for carbide inserts, from P40 Free-cutting steel. They describe the whole sub-group and are not tuned to 11SMn30. 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 P group range.
| Operation | Geometry | Coating family | Coolant | First check |
|---|---|---|---|---|
| Roughing | Positive sharp edge; chip control is rarely a problem | Coated carbide | Per process | Speed in band: built-up edge is the one common issue |
| Finishing | Positive sharp edge | Coated carbide | Per process | Finish drop with a dull edge: replace a worn edge |
| Interrupted cut | Positive edge with a light hone | Coated carbide | Per process | Lead-free substitutes machine differently: re-tune speeds |
| Low rigidity / thin wall | Positive sharp edge | Coated carbide | Per process | Mostly low speed or a dull edge |
Setup rows are the selection table of the P40 Free-cutting steel guide. They carry no speeds, so they do not change the starting band above.
Coated carbide, P10–P25. Chip control is easy thanks to the manganese-sulfide inclusions.
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 P grade list and in the grade chart.
EN 11SMn30, Werkstoffnummer 1.0715, US AISI 1213 / 1215 (nearest), JIS SUM22. The full table, with the nearest-match flags, is on the 11SMn30 / AISI 1213 cross-reference page.
Resulfurised free-machining steel: chips break themselves and speeds run high. The trade-off is weld and surface-integrity limits on the part, not the machining.
Are you overpaying on your 11SMn30 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 P40 Free-cutting steel sub-group is 200–350 m/min (655–1150 sfm) at 0.10–0.40 mm/rev (.004–.016 ipr). It is a starting band for the whole sub-group, not a value tuned to 11SMn30, so confirm on a sample part and adjust for condition, tool and rigidity.
Coated carbide, P10–P25. Chip control is easy thanks to the manganese-sulfide inclusions. 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 11SMn30 (Werkstoffnummer 1.0715); US: AISI 1213 / 1215 (nearest); JIS: SUM22. At least one pairing is nearest-by-properties, not a drop-in equivalent: the material certificate decides.
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.