Assuming soft 150-200 HB:
Rough Turning - 450 SFM up to .015" per rev.
Finish Turning - 525 SFM
Single Point Threading - 90 SFM
Drilling HSSCO - 50 SFM Carbide - 125 SFM
You can also use cermets. Particularly if you are cutting it hard. Dead
soft it tends to be gummy and prone to tearing. Not at all unlike custom
455, 17-4PH, or 440C.
Chip control will be an issue, particularly finish turning and single point
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