The retained mandrel for the production of large-sized seamless steel pipe is used in sectional structure. Its working section is exposed to complex and huge surface pressure as well as thermal cold-hot fatigue, whereas its connection part has to withstand mechanical forces during the pres sing process.
The working part of the retained mandrel produced by CBR adopts H13 hot-work die steel. The many production processes, that include smelting, forging, rough machining, heat treatment, semi-finished & finished machining, chrome plating and phosphate treatment, ensures the following characteristics: CBR is upgrading the mandrel material and its manufacturing technology in close collaboration with Baosteel Research Institute.
We are a specialized exporter with a long history in the line of track shoe assembly, track roller, top roller, idler and sprocket which are the main supplementary for all kinds of excavators, bulldozers, spreader, milling machine, crawler cranes. Meanwhile we are also handling various kinds of gear boxes in the fields of cement industry, shipping industry, airline industry and other industries.
Our products will fully satisfy all requirements for equipment supplementary with highest quality and lowest price.
