Sep 20, 2017
Ductile iron floating manhole cover is a kind of ductile iron products. Usually circular manhole covers are used in the urban areas, because the circular covers are not easy to tilt, can better protect the pedestrian and vehicle safety.
The characteristics of ductile iron manhole covers: Good Toughness. It is 10 times more than the iron material. Strong Corrosion Resistance. The service life is 2 times of gray iron, is 5 times that of ordinary steel. Good Plasticity. Carbon steel and iron materials, the elongation is zero. High Strength. The same with low carbon steel, is three times of the iron material. One of the important reasons of choosing ductile cast iron is lower cost than steel. The strength of ductile iron and steel strength is comparable. Ductile iron has higher yield strength, minimum yield strength is 40K, while the yield strength of steel is only 36k. In most municipal application fields, such as: water, salt water, steam, ductile iron corrosion resistance and oxidation resistance is better than steel.
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