Been searching but nothing is coming up. Is there a place you can send a sample and have it identified? I got a couple 7ft sticks of 1 3/4" round bar from a guy off craigslist. Figured they were just mild. I cut a couple "coins" off one and heated and quenched and they snapped in the vise when i hit them with a hammer. I have just some cheap hardness test files and looks like its about 45 hardness after water quench. The unquenched one didnt break. So now I am wondering what it is or if it is worth having it tested. I dont know what that costs normally.