Bearing steel pipe for sale of imported gcr4 steel smelting quality bearing steel demanding, and requires strict control of sulfur, phosphorus, hydrogen content, and the number, size and distribution of non-metallic inclusions and carbides, because of non-metallic inclusions and carbonation the number, size, and distribution thereof greatly influence the life of the bearing steel, the bearing is often the failure is in large microcracks or carbide inclusions extended from generating around. And the content of inclusions in steel is closely related to the oxygen content, the higher the oxygen content, the more the number of inclusions, the shorter the lifetime. The larger the size of inclusions and carbides, the more uniform distribution, the shorter the service life, and their size distribution is closely related to the quality of the smelting and refining processes used in the production process of the main bearing steel continuous casting furnace and + ESR smelting smelting process, there is a small vacuum induction + vacuum consumable double vacuum or + repeatedly vacuum consumable and other technology to improve the quality bearing steel. Uses: In addition to doing ball bearing rings endures, sometimes used to make tools, such as dies, measuring tools, taps and so on. Specifications are round, flat steel, steel wire, steel surfaces should be processed well. There shall be no cracks, folds, scars and inclusions. Cold-drawn steel surfaces should be smooth, clean, non-oxide. Rolling bearing steel is mainly used in the manufacture of rolling elements and rings.