This co. is a specialized enterprise for hot rolling ball ground steel balls produced according to the standards of GB8649. The yearly capacity of this enterprise is 72,000 tons of all sorts of ball ground steel balls of Φ20mm?#934;150mm. The material of ball ground steel balls is excellent quality special steel. Its technological characteristics are: (1) We have purchased from steel plant special round steel 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, abrasion loss of ball ground steel balls gets lower, its hardness becomes larger. (Hardness for ground balls whose diameters are more than 100mm can be kept from the surface to the center of the balls). It has high tenacity,the breakage rate is rather low. (but its life time is more than twice that for casting balls). These products are widely used in mines, mineral media, all sorts of grinding machines in bad environment. These products can be stably used for a long time, the effect is rather ideal.