On Sep 22, 6:10*pm, "Stupendous Man" wrote:
I am thinking of taking my old anvil to work and using the surface grinder
to flatten it out.
Are old anvils heat treated, or just hardened by use?

Resurfacing an anvil, I'm told, is done with welding to build
up a surface of good hard steel, THEN beating or grinding it flat.
The core of the anvil might not be good steel, grinding down
to the core wouldn't be helpful.