Gu Chang foundry for you in the development process of ductile iron manhole cover briefly: ductile iron is the 1950s developed a high-strength cast iron materials, its overall performance is close to steel, is based on its excellent performance, has been successfully used to cast a number of complex stress, high strength, toughness, wear resistance requirements of the parts. Ductile iron has been behind the rapid development of gray cast iron, cast iron material is widely used. Gu Chang-year foundry mainly produces ductile iron covers cast iron covers offer, welcome to order! Gu Chang foundry in Brief covers the two most important parameters are with you. The two most important parameters of the covers for the hardness and toughness. In general, the higher the hardness, the better the quality cast iron covers bearing, but the high hardness, toughness, but also quite good, this is good covers. Gu Chang-year foundry remind you that make the design, in addition to determining the geometry of the cast iron manhole covers, according to the working conditions and the size of the metal material properties, but also must be from the perspective of casting alloys and casting characteristics to consider the rationality of the design diameter cast iron covers, namely significant size effect and solidification shrinkage cast iron manhole covers, stress and other issues, in order to avoid or reduce the cast iron covers of segregation, deformation, cracks and other defects. Gu Chang foundry located in Shanxi Province, Taigu County towns Hu Dong village crossing State Road 108. Cast iron covers Quote | Luliang cast iron manhole covers | Chang in foundry provided by Gu Chang in foundry. Gu Chang-year foundry (www.sxcnzz.com) strong, credible, in Jinzhong machining industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chang and you work in the foundry into the brilliant, for a better future!