The Energosteel Company mastered the new diameter of grinding balls in June 2018. An experimental batch the 110 mm grinding balls has produced for the first time and it has launched into production from the first billet with a minimum stand settings.
This batch has showed a high hardness values, the 56-62 HRC surface hardness of , and the 45,3-48,7HRC volumetric hardness and corresponds to the 4 hardness group (according to DSTU 3499-97) and the 5th hardness group (according to the new state standard for steel grinding balls DSTU 8538 : 2015).
Grinding balls have been successfully tested for the impact resistance. 110 grinding balls have been selected from a batch for the experiment. Each selected ball sustained the total impact energy of 168437 J without destruction.