For the production of grinding balls, Energosteel uses hot rolled round bar from medium and high carbon and low-alloyed steel according to DSTU 8538: 2015. Alloying steel is mainly done by introducing elements that reduce the propensity of steel to corrosion destruction or elements that change the more dangerous form of corrosion to a less dangerous one (e.g., the transition of intercrystalline corrosion to uniform).
Steel is most commonly injected with chromium, nickel, aluminium, silicon and molybdenum, separately or jointly, in different ratios. The presence of these elements in sufficient quantities makes steel resistant to corrosion in water, in the humid atmosphere, in solutions of many acids and alkalis and in the atmosphere of dry gases at high temperatures. The erosion resistance increases in steels with a high carbon content.
According to DSTU 8538:2015, grinding balls of the “High C” and “High C + Cr” hardness group of production «Energosteel» are made of steels with high content of carbon and alloying elements.
In the production of steel grinding balls of “Average C” hardness groups, Energosteel uses steels specially developed by the company’s specialists in conjunction with suppliers of hot-rolled round products, which provide a change in the mechanical properties of the metal in micro-volumes, while increasing the corrosion resistance.
