Ductile iron has greater strength and ductility than gray iron. Those properties allow it to be used effectively in a wide variety of industrial applications, including pipe, automotive components, wheels, gear boxes, pump housings, machine frames for the wind-power industry, and many more.One of the main advantages of ductile iron is its ductility, which makes it less brittle and more resistant to cracking under stress. Ductile iron is also more corrosion-resistant than cast iron, making it a better choice for outdoor applications.Comparatively high production costs. Although we said ductile iron is not expensive, its prices are not the lowest. It is still more costly compared with grey iron, because of extra spheroidizing agent alloys, and pig iron of high quality.

While, both have their share of strengths - cast iron being more suitable for areas with less traffic, walkways, footpaths, and drainage systems. On the other hand, ductile iron covers can perform excessively well in heavy traffic areas, roads, highways, and industrial landscapes.The main materials used for manhole covers are metals and are as follows: Aluminium. Stainless steel. Galvanised steel. Strong and resilient Cast Iron and Ductile Iron manhole covers typically carry a maximum weight load of 40 tonnes and can generally be found on main roads and areas that get high traffic such as public car parks.