So I was wondering what those experienced roughing and finishing (with a nice finish) would use to cut a part out of a 3"x4"x6" block of 15-5 H1025.

I have some experience with the stuff and think I would lean towards a 5 flute endmill or so (helical maybe) and do some chip thinning. It's about 40 rockwell.

I have some tall vertical features to finish. Walls etc... that are 3.25 inches tall.. My main questions are would it be a good idea to try and finish that all at once with a long flute endmill.... OR.. maybe get a solid shank endmill with only 1.0"LOC and step it down.....

Anyways... just curious what those with time in the realm of heat treated 15-5SS would use... as far as tooling and approach...

Thank you for any input!

P.S.. What about reaming a small hole.. (.1242"-1246") reamer brands? SnF?