With a chromium content of ≥10 per cent and a high proportion of hard chromium carbides, these steel balls exhibit significantly lower wear rates than low-chromium or medium-chromium steel balls, substantially reducing the frequency of ball replenishment and minimising mill downtime for maintenance. Following a complete quenching and tempering heat treatment process, the matrix features a martensitic microstructure with minimal variation in hardness between the surface and core, and a HRC hardness of ≥58.

Excellent toughness enables withstanding high-impact operating conditions; strong resistance to slurry corrosion ensures outstanding performance in both wet and dry grinding, making it suitable for wet mineral processing and the grinding of hard ores. Strict control of sulphur (S) and phosphorus (P) impurities significantly reduces the likelihood of ball rupture and chipping.

Widely used in mineral processing, non-ferrous metal mining, cement clinker production, ball milling in large semi-autogenous mills, and the grinding of hard materials such as sand and gravel. Disadvantages: Raw material costs are relatively high, making it unsuitable for lightly abrasive applications where cost is a critical factor.

A full range of sizes from Φ4.98 mm to Φ130 mm is available, with support for customer-specified size ratios; material test reports are provided for each batch; export packaging in tonne bags and steel drums is available to meet the requirements of large-volume international orders.