Ductile iron pipes, named for their inherent iron nature and steel properties. Graphite in ductile iron pipes exists in spherical form, typically ranging from 6-7 grades in size. Quality requirements dictate that the spheroidizing grade of cast iron pipes be controlled at 1-3 levels, 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 ductile iron pipes consists of ferrite with a small amount of pearlite, boasting excellent mechanical properties, hence also known as cast iron steel pipes.

Features: Iron in nature, steel in performance, excellent corrosion resistance, good ductility, easy installation, mainly used in municipal and industrial enterprises for water supply and gas transmission.