The Reason We Choose Ductile Iron Manhole Cover

Nodular cast iron manhole cover has corrosion resistance, and its water spray corrosion test shows that the corrosion amount of 90 days is only 1/40 of that of gray cast iron manhole cover. Its spherical graphite micro layout is better than that of cast steel in weakening the vibration ability, so it is more conducive to reducing the falling stress. One reason for the tension in choosing ductile iron manhole covers is that the cost of ductile iron is lower than that of cast steel. Its cost can make this material more popular, and the casting compliance is higher than that of steel. In addition, it has eliminated the cost of processing. Because of its good toughness, it is about 30% lighter than the gray cast iron manhole cover of the same example. The product has good antiseptic ability. This is also a reason why we choose it.