Been learning about the burners and they seem very efficient. But I cannot find temperatures produced and only one person who melted steel....and his crucible. Anyhow, my forge is fired with a Harbor Freight weed burner and I can cast bronze and brass. Tried to melt some scraps of cast iron I have and it just wouldn't quite get there. Really would like to be able to add cast iron to my repertoire, as there are times I want to use it for the finished product. I really do not want to mess with an oil fired burner even though they are basically the same, blown fire.