You could try sinking a sledgehammer (or comparatively similar tool) into some concrete and using the head as the anvil. It wont last long but it does it's job
Furdle you aren't trying to build your own shower pieces are you?
Concrete would be too weak to withstand a hammer hit with a hot metal bar on it. Not to mention most concrete blocks aren't smooth unless you compress/sandpaper it.
Yeah with that I think it wont work too well just because of the constant downward pressure when its being used, it would be enough to break the concrete open after probably one or two uses.Anvils are shaped the way they are to mainly reduce the impact it has on the floor beneath it, I'll think of a way to use a free weight to be able to be placed on the outside pavement tile flooring.Also I'm thinking that if I did this for long enough I'd make a youtube channel, mainly just so I can have a cool record of stuff that I make, but focus it on salvaging cheap stuff I find in thrift stores. The town I'll be living on next year has a road with literally 12 thrift stores all next to each other. (We call them 'charity shops' where people donate their junk which is mainly clothes to the stores and they give profits to charities)The first project would probably be a go-kart.
Obviously you'd be using the sledgehammer head as the face, not the concrete keeping it in place.
I recycle precious metals from computer/phone/coin/jewellery/silverware. It involves purifying metals compounds, acids, assaying, electric stripping and plating.But its done at a much smaller scale then actual blacksmithing, so i cant really compare.