Advantages of ductile iron manhole covers

Ductile iron manhole covers are mainly made of ductile iron. The quality of this manhole cover involves the issue of spheroidization rate. The commonly used coating for treating castings is anti-rust asphalt paint.

Ductile iron manhole covers are mainly made of ductile iron. The quality of this manhole cover involves the issue of spheroidization rate. The commonly used coating for treating castings is anti-rust asphalt paint. Of course, the surface of ductile iron manhole covers is also sprayed with anti-rust asphalt paint. One advantage of ductile iron manhole covers is that due to the high strength and good toughness of ductile iron, ductile iron manhole covers are about 30% lighter than the same type of gray cast iron manhole covers.