Jinan Zhongwei Casting And Forging Grinding Ball Co.,Ltd
Jinan Zhongwei Casting And Forging Grinding Ball Co.,Ltd 18 Years focus on development and production of grinding media Casting quality with strength, Forging glory with integrity
hot rolling forged steel ball Type and Chenical Composition of Forged Balls Name Material Chemical Composition C Si Mn S/P Cr HRC Forged ball B2 0.72...