The wear life is significantly longer than that of low-chromium steel balls, whilst the toughness is superior to that of standard high-chromium balls; striking a balance between hardness and impact resistance, they are less prone to brittle fracture or chipping, making them a cost-effective grinding medium that falls between low-chromium and high-chromium variants, with a HRC hardness of 48–52. They undergo high-temperature tempering to eliminate casting stresses and reduce the risk of cracking during subsequent use.

Smelted in a medium-frequency furnace and cast using metal moulds, these balls exhibit minimal internal porosity and porosity defects, with a small hardness gradient ensuring minimal variation in properties between the surface and core. Strict control over sulphur and phosphorus impurities reduces sources of brittleness, resulting in uniform and gradual wear that maintains a stable ball size distribution within the mill and reduces the frequency of ball replenishment.

Suitable for both dry and wet grinding; suitable for the grinding of cement clinker, medium-hardness ores, coal grinding in power stations, limestone, non-metallic minerals and building materials. Compared to low-chromium balls: lower wear and longer service life; compared to high-chromium balls: lower procurement costs and reduced impact on liners, making them suitable for conditions involving moderate wear and moderate impact; not suitable for highly corrosive slurries or the coarse grinding of ultra-hard heavy ores.

A full range of sizes from Φ4.98 to Φ130 mm is available, supporting mixed batches of different sizes; chemical and hardness test reports can be provided for each batch; export packaging includes tonne bags and steel drums; bulk supply is available with stable delivery lead times.