When metal scrap is recycled, and it is all mixed together it is “mixed metal.” It still has to be separated before melting. The basic separation method is electromagnetic, to get the steel out. Metals melt at different temperatures, so while the metal is melting, the different metals are taken out of the smelting process when such temperatures occur. Recycled steel of different types are melted together, and low tensile strength quality (not high tensile strength) products are made, like roof/gutter flashings, rebar, etc.