Ductile iron pipes, named for their inherent iron nature and steel properties. The graphite in ductile iron pipes exists in spherical form, typically ranging in size from 6-7 grades. The quality standards require the spheroidizing grade of cast iron pipes to be controlled at 1-3 grades, with a spheroidizing rate of ≥80%, thereby significantly improving the material's mechanical properties, combining the essence of iron with the performance of steel. After annealing, the microstructure of the ductile iron pipes consists of ferrite with a small amount of spheroidite, featuring excellent mechanical properties, hence also known as cast iron steel pipes.

Features: Possesses the essence of iron, the performance of steel, excellent corrosion resistance, good ductility, easy installation, mainly used in municipal and industrial enterprises for water supply and gas transmission.