I am going to be making an anvil out of a piece of RR track in school. I chose to put this post here because I am in school for welding and going to weld it up. I have to make a box for another class in my lab first, but I will get on the anvil in a couple of days. I will try and keep you informed with pictures along the way, but my cell phone just recently died on me.
I'll try and use a friend's phone. until I get another....
What I plan to do: use a piece of RR plate for the heel because of the square hole. I will bevel this plate on both sides, weld it to the back of the rail with a E6010 3-bead root pass on both sides. Then, I am going to fill in the grooves with E7018. And finally, I am going to run a hardfacing rod over the top of the E7018 on the "face" of the rail. I also am going to use E7018 to build up the horn because I go the rail all chopped up with an O/A torch and I have to fix it.