Chilled Steel Balls

Craster produces chilled steel balls in sizes 60, 70, 80, 90, 100, 120mm diameter. The balls are cast in water cooled copper dies. Gold mines which have bigger diameter mills prefer the chilled steel balls because of their ability to “freefall” and crush ore.

60mm - 100mm**
Carbon 2.0 - 2.5% and 1.3^1.5%
Manganese 0.8^1.1% maximum* and 05. - 1%**
Chromium 1% maximum
Sulphur 0.09% maximum
Average Hardness 450 - 500* and 360 Brinell Hardness Number**

The balls produced by Craster International are manufactured using advanced methods and processed under very rigorous metallurgical controls to ensure quality, consistency and durability. Every batch of balls is laboratory tested against the required specifications. Only the best balls are released to the customers.