Recycle with Tullis Metals. We buy all types of metals: pots and pans, refrigerators, stoves, brass, copper, aluminum- if it's metal, chances are that we will buy it. Our prices are competitive, our scales accurate, and our staff friendly.So come do business with Tullis Metals, locally owned and operated since 1972. Different alloys added to aluminum provides different qualities. Manganese increases the strength and resistance to corrosion. Silicon improves castability and zinc will increase the hardness of aluminum.