Specification: 1. diameter: From 30*60*39*16mm to 90*126*90*47mm, can also make as per customer’s special requirement. 5.2 mechanical properties Microstructure: P+c, ak (j/cm2): >2.0, hrc:45-52 3. chemical composition: C, si, mn, cr, mo, cu, p, s We are manufacturer of grinding balls, grinding bars and other mill materials, if you have any interested in them, please contact me, i will send you our catalogue and technical date for reference. Currency: Unit Price: Quantity: Delivery: