kinds of forged grinding steel balls: Forged grinding balls: (1) new type of high efficiency alloy forging steel balls Size: dia20-150mm Hardness: HRC50-60 (2)RCAB-2 new materials forged steel balls Size: dia50-150mm Hardness: dia50-100 HRC60-64 dia110-150mm HRC55-60 We Shandong Huamin Steel Ball Joint-stock Co. Ltd. is one of the largest manufacturers and exporters of kinds of steel grinding balls in China, with the capacity of 100,000 tons annual. We mainly export to America, Canada, Japan, and South Africa more than ten countries and areas. We have obtained the ISO9001:2000 and ISO 14001:2004. The quality can meet different requirements from different countries. We sincerely welcome customers both at home and abroad to come to negotiate business with us. IF you are interested in our products, please feel free to contact me. We will try our best to meet your requirements with the high quality, favorable price, timely delivery and best service.