Ovako supplies grinding rods and grinding balls for the mining and minerals processing industry.
Grinding rods
Grinding rods are delivered in the as-rolled, straightened condition. The grinding rod steel is of the type 1.0% C 1.4% Cr. The dimensions range is Ø 75 to 120 mm. The hardness range is 340 to 400 HBW.
Grinding balls
Grinding balls are delivered as-rolled or in the quenched and tempered condition. The standard grinding ball steel A810 is of the type 0.83% C, 0.8% Mn, 0.3% Cr.
Hardness in the quenched and tempered condition.
The A 810 grinding balls maintain the same wear resistance from start to finish. Grinding balls of other steel grades can be supplied upon request.
Hardness
Surface:
62 - 66 HRC
Core:
60 - 65 HRC
Average volumetric hardness:
61 - 65 HRC