Profile: Shanxi Datong Casing Import & Export Co., Ltd. specializes in providing ductile iron pipes, ductile iron pipe fittings and rubber gaskets. Ductile iron pipes are a type of cast iron pipe that have improved strength and ductility compared to traditional cast iron pipes. They are made from a type of cast iron that has been treated with small amounts of magnesium to improve its strength and ductility. The resulting material is known as ductile iron, which is also sometimes referred to as nodular cast iron or spheroidal graphite iron.