Ukrainian steelmaker Kametstal has begun full-scale production of 100 mm grinding balls with fifth-group hardness for industrial mining applications. The company achieved this through internal upgrades to its rolling mill, adjusting heat-treatment processes and mechanical systems. With over 500 metric tons already shipped, Kametstal positions itself as a reliable supplier of high-performance materials to mining companies. The effort reflects industrial resilience and local innovation in Ukraine's metallurgical sector