Starting cutting speed in m/min and sfm, feed in mm/rev and ipr, the carbide grade class and the setup by operation for AISI 1045 (C45). The numbers are the published P02 Medium carbon steel sub-group starting band; the designations are on the cross-reference page.
| Item | Value |
|---|---|
| ISO 513 group | P Steel |
| Sub-group | P02 Medium carbon steel |
| Sub-group hardness / condition | 160–220 HB |
| Category | Medium-carbon steel |
| EN / Werkstoffnummer | C45 · 1.0503 |
Hardness is the range published for the whole P02 Medium carbon steel sub-group on our material guide; the delivery condition of your AISI 1045 may sit anywhere inside it or outside it.
| Condition | Vc m/min | Vc sfm | Feed mm/rev | Feed ipr |
|---|---|---|---|---|
| P02 Medium carbon steel, 160–220 HB | 180–280 | 590–920 | 0.10–0.40 | .004–.016 |
Sub-group starting values for carbide inserts, from P02 Medium carbon steel. They describe the whole sub-group and are not tuned to AISI 1045. 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 | Negative for roughing and economy, medium chipbreaker | CVD-coated carbide | Per process | Chip control: match the chipbreaker to depth and feed |
| Finishing | Positive for finishing, medium chipbreaker | CVD-coated carbide | Per process | Flank wear sets tool life: balance Vc and grade |
| Interrupted cut | Negative with a robust chipbreaker | CVD-coated carbide | Per process | Crater wear at high speed: ease Vc |
| Low rigidity / thin wall | Positive for low-rigidity work | CVD-coated carbide | Per process | Built-up edge at low speed: raise Vc, sharper edge |
Setup rows are the selection table of the P02 Medium carbon steel guide. They carry no speeds, so they do not change the starting band above.
Same sub-group, same starting band: AISI 1060 · AISI 1035 · AISI 1050
CVD-coated carbide, P15–P25; tougher for roughing, harder for finishing.
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 C45, Werkstoffnummer 1.0503, US AISI 1045 (UNS G10450), JIS S45C. The full table, with the nearest-match flags, is on the C45 / AISI 1045 cross-reference page.
The benchmark P-group steel: predictable chips, wide speed window. Normalised C45 machines freely with a general-purpose CVD-coated grade at mid-range data.
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The published starting band for the P02 Medium carbon steel sub-group is 180–280 m/min (590–920 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 AISI 1045, so confirm on a sample part and adjust for condition, tool and rigidity.
CVD-coated carbide, P15–P25; tougher for roughing, harder for finishing. 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 C45 (Werkstoffnummer 1.0503); US: AISI 1045 (UNS G10450); JIS: S45C. 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.