Workpiece material / Steel
C45W Carbon Steel (1.1730) speeds and feeds
Starting surface speeds and chip loads for milling C45W Carbon Steel (1.1730). Every value below is cross-checked against published sources and linked, so you can re-verify it yourself. Starting points, not limits.
- W.Nr
- 1.1730
- DIN / EN
- C45W
- AISI / SAE
- 1045
- UNS
- G10450
- Brands
- C45, 1.0503 (general-quality C45)
- Hardness
- 170-200 HB
- Condition
- Annealed / as-supplied (about 170-200 HB).
- ISO 513 group
- P
| Value | Used | Provider readings (each linked) |
|---|---|---|
| Surface speed, HSS (estimated) | 80 SFM | |
| Surface speed, carbide (estimated) | 330 SFM |
|
| Chip load @ 0.25" (estimated) | 0.0013 in/tooth |
|
| 0.125" | 0.25" | 0.5" |
|---|---|---|
| 0.0006 | 0.0013 | 0.0026 |
| Constant | Value | Readings |
|---|---|---|
| Kc1.1 (specific cutting force) (estimated) | 1,600 N/mm2 |
|
| mc (chip-thickness exponent) (estimated) | 0.25 | ISO P group-typical - see notes |
| Unit power (estimated) | 1.35 HP/(in3/min) | ISO P group-typical - see notes |
The power-model constants (Kc1.1, mc, unit power) are class-typical values for the ISO P group, used only for a rough spindle-power estimate. Only their relative ordering and internal consistency are verified, never tuned to match any vendor.
Notes
C45W (1.1730) is the tool / mould-plate quality of C45 - an unalloyed medium-carbon steel, the same composition as AISI 1045 (the general-engineering quality carries the number 1.0503). It machines like a plain carbon steel, faster and easier than the alloy tool steels. Surface speed is from Machining Doctor's 1045 data sheet (indexable milling 490-670 SFM); the shipped 330 SFM is a conservative solid-tool starting point, and cutting parameters are flagged estimated pending a solid-end-mill cross-check. The power-model constants are ISO P carbon-steel class-typical values.
Verify this yourself
Every number above links to the provider that publishes it. Open two or more and confirm they agree with what is shown here. Full source list:
Take these into the feeds and speeds calculator for RPM, feed and power. Start a little under these numbers on a light or flexible setup.