Precipitation hardened stainless (17-4, 15-5) are almost always machined in an annealed state, |
Just my $.02
I turn all PH stainless in heat treated condition up to about 180 KSI tensile. Then I decide on a job by job basis depending on the geometry and tolerance involved. Up to 180 KSI, PH's cut very nicely. In some cases BETTER than in annealed condition using coated carbde inserts.