Originally Posted by MPandC
To add to what Roger said, I use cutoff wheels from my local welding supply store that are rated for cutting STAINLESS STEEL.

I also use cutoff wheels for stainless steel. They absolutely do last longer on all steels.
These are the ones that I buy:
Roark Supply 3" Cut Off Wheels

Roark Supply is my go-to source for all my metal working products.