Jim, I've used router bits (in routers) on aluminum many times. I've been wondering how they would do with brass. I assume since you say you're using them successfully in steel (at appropriate feeds and speeds, in a stout mill, etc.) it shouldn't be a problem? I figure brass would look cool with a decorative profile, like a reverse ogee or that sort of thing. I don't have an application at this point, I've just been thinking about it.
Here's the cutter you need....View attachment 135175
Here's the cutter you need....View attachment 135175
I've never tried them in brass, but with proper care I don't see why they wouldn't work. Solid setup and preferably 1/2 inch shank tools would be best.