Life is often seen in the installation of ductile iron covers, and the ductile iron covers are made of ball cast iron, because the ball cast iron high strength, good toughness, so the ductile iron cover itself than the same gray cast iron covers It is about 30 percent lighter, and its tensile strength and elongation are very good, but some people still ask, what are the characteristics of ductile iron covers, the following we come for a brief introduction to the people.

The first is the anti-theft effect, covers and wells into an integrated connection, hinge open, sledgehammer smashed is not bad, completely anti-theft.

Second, the weight of the covers is relatively large, the cast iron and the toughness of the cast iron is four times the ordinary cast iron, close to the steel material, suitable for a variety of road use.In addition, ductile iron covers corrosion resistance, The environment is very complex, all kinds of chemical substances are, and ductile iron covers in the use of the time will not be the corrosion of these chemicals, under normal circumstances its service life can reach more than 30 years.

Finally, in addition to this point is that the covers are very light weight, so people can open one hand, very convenient.