When choosing the product of ductile iron covers, the hardness of the products is a problem of concern for the users. So how can we distinguish the hardness of products from the selection of ductile iron covers in the market? What are the main factors related to the hardness of nodular cast iron well covers? Now let's understand it with Xiaobian.
Ductile iron wells conceal the ability to deform or crack in small volumes on the surface. According to different experimental methods, the physical meaning of the hardness value of the original data of the resin well cover is also different. The hardness value of this method is the resistance of the manhole cover to plastic deformation caused by the nominal resistance of another object. The hardness value of the carving method indicates that the appearance of the manhole cover is cracked.
Ductile iron manhole covers are used in the whole static load pressure test。 According to the shape of the head, the data of the cover plate and the loading dimensions, hardness can have Brinell hardness, Rockwell hardness, hardness and microhardness。 They are used to make different covers。
厂家在生产山东球墨铸铁井盖的时分，还要保证其质量经过相关的监视检验部门检验合格并获得生产答应证后才能够生产，同时应有标牌。本文来源：http://www.kpp647.com/When manufacturers Manufacture ductile iron manhole covers, they must ensure that their quality is inspected and verified by the relevant inspection and inspection departments, and that they can be produced after obtaining the production permit. Source: http://www.kpp647.com/