Discussion desired in Anvils, Swage Blocks, and Mandrels Posted March 12, 2019 17 hours ago, Nobody Special said: If all you are concerned about is a large striking anvil, have you considered obtaining a block of 4140 or some similar? When striking with a hammer that large goes awry, it can be tough on the anvil. Thanks for the info. I do have an 80 pound chunk of mild that I have made into a striking anvil, but I have not finished the hardy hole in it yet. Such a thick piece is proving to be daunting.