Most clad metals are composites of the cladding metal like stainless steel, nickel and nickel alloys, and copper and copper alloys welded to your backing product of either carbon or alloy steel. The 2 metals are welded together in a mill inside of a roll under warmth and tension. Rammed https://youslade.com/post/96821_zinc-clad-roofs-are-long-lasting-low-maintenance-and-environmentally-friendly-of.html