Cast iron round manhole cover

The cost of ductile iron is lower than that of cast steel, so the use of ductile iron can reduce costs when making manhole covers. At the same time, due to its excellent casting performance, the casting efficiency of ductile iron is also relatively high, which can meet the needs of large-scale production.
In addition, ductile iron corrosion resistance is also better than many other materials. In humid environments, such as water, salt water, steam, etc., ductile iron can effectively resist oxidation and corrosion to ensure the service life of manhole covers. This feature makes it a significant advantage in municipal applications.
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