Ductile cast iron (also known as Spheroidal graphite iron or Nodular Cast Iron) was invented in 1940'. Ductile Iron retains the corrosion resistance of cast iron but has more than double the tensile strength. The essential differences between Ductile and Cast Iron lies in the shape of the graphite in the microstructure of the metal. In Cast Iron, the graphite is present in plate-like flakes, which makes Cast Iron brittle. But in Ductile iron, the shape of the graphite becomes a spheroidal nodule, which offers better mechanical properties and makes Ductile Iron sturdy, Structurally stronger and shock-proof.

Ductile Iron pipe is considered as the most preferred pipe material for water supply and pressure sewerage application all over the world. It offers higher Tensile Strength than Mild Steel and retains the inherent corrosion resistance of cast iron.

Ductile iron pipeline systems, including pipes, fittings, accessories and joints, consist of various materials. When used for conveying water intended for human consumption, the materials in contact with the water shall meet the relevant requirements of the national standards or regulations in the country of use with respect to effect on water quality.