Gunner wrote:

Im doing it now...on a shaper..simply because it was killing my
endmills




Shaper? What the hell is a shaper? Kidding. Sort of.

"How do you guys handle working with a HAZ on plate?"

I have some old end mills that are "used up" on the first .100" but are
sharp above that. I save these for this kind of thing. I'd cut it with
the side, not the end.

Conventional type milling deeper than the worst of the HAZ. I might use
an old junk 1/2" carbide at 500 RPM at 5 IPM with flood coolant. I
know, that's moving really slow, but that's how I do it.

The worst HAZ I've ever seen was some very thick plate that was cut
with a carbon arc. I took a grinder to the bad areas first.