Shandong Huamin Steel Ball Joint-Stock Co.,LTD is one leading professional manufacturer and exporter of grinding steel balls for mining industries. We have the automatic production lines to produce the balls to keep the balls uniform.As well our company has Get Authentication of ISO9001 and ISO14001 and the quality has up to advanced level in the world and can meet different requirements of different customers. Our grinding steel balls mainly as follows: 1.Forged Grinding Steel Balls: Diameter:20mm-150mm Hardness: HRC55-65 2.Grinding steel Rods in Rod Mills: Diameter available: 60-100mm Length available: 2.5m-6.5m Hardness:HRC45-55 Features:Steady hardness,straightness, and good wear resistance. 3. High chrome casting iron balls: Diameter:17mm-120mm Cr content:12-14% Hardness:HRC58-65 Features: High and steady hardness,no breakage,good wear resistance and even good wearing. Applied fields:various mines,cement plants, power stations,chemical industries etc. Show More