Ductile Iron is a very strong, safe, and reliable product and has stood the test of time. Modern Ductile Iron Pipe is made to last over 100 years and it is an environmentally preferable product due to its recycled content, energy savings while in service, its durability, its own recyclability and because of the commitment of the DI Pipe industry.
Ductile Iron is also known as the spheroidal graphite iron or nodular cast iron was invented in 1949. Ductile Iron retains the corrosion resistance of cast iron but has more than double the tensile strength, Cast Iron has 180 MPa (min), and Ductile Iron has 420 Mpa (min). The crucial differences between Ductile and Cast Iron lie in the shape of the graphite in the microstructure of the metal. Graphite is present in plate-like flakes in Cast Iron which makes it very brittle. In ductile iron, the shape of the graphite becomes a spheroidal nodule, which increases tensile strength and makes Ductile Iron sturdy 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 and diametral stiffness than Mild Steel and retains the inherent corrosion resistance of cast iron. Pipes made Ductile Cast Iron, provides substantial benefits in terms of pressure bearing ability, impact resistance and capacity to sustain external static/dynamic loading.
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