Products description: Our hot rolling ball ground steel balls produced according to the standards of GB8649. yearly capacity is 72,000 tons of all sorts of ball ground steel balls of diameter20mm?50mm. we independently researched and made fully new technique by ourselves to produce hot rolling ball ground steel balls and developed successfully. We created excellent production facility .The material used ball ground steel balls is special steel with excellent quality which have following technological characteristics : (1) The special round steel we bought are from steel plant for corresponding steel balls. (2) Round steel is heated to 800-900℃. (3) Once ball formation by rolling machine of the production line. (4) With advanced finishing technique: low abrasion rate, high hardness (Hardness for diameter more than 100mm of ground balls can be kept from surface to core). It has high tenacity, broken rate is rather low. More important, The life is double of casting balls. These products are widely used in mines, mineral media, all sorts of grinding machines in bad environment. These products can be used stability for a long time with excellent results.. Mineral engineers both domestic & overseas also have given their good comments for our products. They never see such good balls before which can greatly increase productivity and economic & social profits. Its properties are as follows: