It's not what you think! It's not the only kind of metal that should be left over from forging
It's a misconception that all types of metal can be left over from forging. For example, it's not possible to leave excess bronze or copper in the forge. These metals are too soft, and they will melt on contact with the fire
There are three main types of metals that can be left over from forges: steel, stainless steel and cast iron. Steel is the most common type of metal left after forging, but there's still plenty of other types of metal to look out for if you're looking for something different.
worthless left over metal from forging