I am having a nightmare of a time trying to turn a chunk of stainless steel of dubious provenance and unknown type.
It's a 65-odd mm diameter lump, that needs reducing to 50mm, then two collars (40mm or so) turning, then it needs bored to 30mm (all figures from memory and not really important to the point).
The point? Ah yes, the point. It's work hardening like a bugger. Then it's breaking brazed-tip carbide tools, which is (frankly) getting un-funny in a big hurry.
If I pussy foot around it takes for *ever*, if I up the feeds & speeds it gets annoyed and eats my cutting tool.