If the magnet sticks to your metal: The mental you have is ferrous metal with you — something familiar like steel or iron. Ferrous metal is not worth anything much when you bring it to the scrapyard, but the scrapyard would accept it and make certain it is recycled.
If the magnet does not stick : Then the metal is non-ferrous. Several common metals — like copper, aluminum, brass, stainless steel, and bronze — falls in the category as non-ferrous metals. These metals are precious to recycle and are worth more money at the scrap yard.