Grinding Steel Ball
Grinding steel balls are spherical media for coarse and fine grinding in ball mills. Rolled from 65Mn, B2, B3 or GCr15 steel, they provide point contact for high impact energy, with surface hardness of 60 65 HRC and uniform wear resistance.
Product Introduction
Our Grinding Steel Ball are rolled from round bars on skew rolling mills – the same mills we build ourselves. We use 65Mn, B2, B3 or GCr15 steel. After rolling, they go through quenching and tempering. Surface hardness runs 60 65 HRC, core hardness 55 60 HRC. Impact toughness is 12 35 J/cm², depending on the grade. One of our customers, a copper mine in Inner Mongolia, tested our 80mm balls against forged ones. The wear rate was 15% lower, and they got 200 more hours of grinding before recharge.
Parameters, Advantages, Our Process, Packaging
Parameters
Grinding Steel Ball Diameter: 20mm to 120mm. Hardness: 60 65 HRC surface, 55 60 HRC core. Impact toughness: 12 35 J/cm². Material: 65Mn, B2, B3 or GCr15. Sphericity tolerance: ≤0.5mm. No internal porosity.
Advantages
Skew rolling eliminates pores and voids. The grain structure is uniform, so balls don't crack or break in service. Compared to cast balls, our rolled balls have 30% lower wear rate. Compared to forged, they are 10 15% tougher. A cement plant in Hebei switched from cast balls to ours and saved $12,000 per year on grinding media alone.
Our Process
We cut round bars, heat them with induction to 1050 1100°C, then roll them through our own skew rolling mills. One pass, done. Then quench, temper, and inspect. Every batch gets hardness tested. We also run a drop test – five drops from 2 meters onto a steel plate. No cracks allowed.
Packaging
Bulk bags (1 ton each) or steel drums. Wrapped and strapped on pallets. Sea freight. Lead time: 20 30 working days for 20 tons. Smaller orders in stock.
FAQ
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