MAIN ADVANTAGES OF DUCTILE IRON
Higher intensity
Compared with steel pipe, ductile iron has higher strength, because the internal structure of ductile iron is composed of spherical graphite wrapped with iron body. The existence of this small and uniform spherical graphite can effectively prevent the concentration of stress between grains, thus improving the strength of ductile iron.
Better corrosion resistance
The surface of the ductile iron after special heat treatment and spraying treatment, forming a layer of self-healing iron oxide layer, which can play a role of corrosion prevention, so that the ductile iron can be used for a long time in a certain environment.
Better shock absorption
The graphite ball of ductile iron has the advantage of similar to ductile iron, that is, it can effectively absorb vibration and noise, so that ductile iron can be used for the occasions with high noise environment and high shock demand.
Longer service life
The service life of ductile iron is longer than steel pipe, because the internal mechanical performance of ductile iron is stable, corrosion resistance is strong, and not easy to fatigue fracture and other problems, which can ensure the service life of ductile iron is longer.
In short, compared with steel pipe, ductile cast iron has higher strength, better corrosion resistance, better shock absorption and longer service life, therefore, in people's industrial production and life, ductile cast iron is widely used in various fields.
