Good Wearing Resistance20mm to 160mm grinding media steel balls Mill Balls
Breif Description:
A full range of hardness can be provided in standard sizes, the ball hardness profiles to maximize wear and impact performance, customized product is available to meet milling and ore conditions.
We hold an advanced automatic forged roll grinding steel balls line in China, which is developed and researched by ourselves. As the raw materials in producing steel balls are high quality alloy steel, we can assure the high hardness and good wear resistance of the products supplied.
1. Product name:mill balls
2. Standard ball sizes for choosing: diameter 20mm to 160mm, (Diameter 1 inch to 6 inch)
3. A full range hardness we provided in standard sizes: Mean Hardness HRC55-HRC65; (BHN560-BHN750), we can also make the balls with the customers’ request;
4. Products all-round properties: High Hardness, Good Wear Resistance, Even Wearing
5. Packages: By flexible container bags (1000kg/bag), or by steel drums (850kgs-900kgs/drum)
6. Delivery time: Under 500 metric tons shipment within 7-45 days normally;
7. Quantity available: 10000 metric tons monthly.
| Material | Chemical Elements | |||||
| C | Si | Mn | P/S | Cr | Hardness (HRC) | |
| 45# | 0.42-0.50 | 0.17-0.37 | 0.5-0.8 | <0.035 | <0.25 | 60-65 |
| 60MN | 0.55-0.65 | 0.17-0.37 | 0.7-1.0 | <0.04 | <0.25 | 58-63 |
| B2 | 0.72-0.85 | 0.17-0.37 | 0.7-1.0 | <0.04 | 0.4-0.6 | 55-58 |
| B3 | 0.5-0.8 | 1.0-1.8 | 0.4-1.0 | 0.035 | 0.5-1.0 | 56-63 |
How hard is hard? The illustrations shown below tell an interesting story. Illustration ‘A’ shows an analysis of the cross sectional hardness of The Steel Ball Company’s ‘thru hard’ ball. Illustration ‘B’ below shows the same analysis carried out on a ball from another major grinding media manufacturer. The ball in illustration ‘B’ has the same AVH figure as The Steel Ball Company’s ball and will wear out at the same time. Yet there the similarity ends. After three quarters of the radius, the hardness of the ‘B’ ball dips below that of The Steel Ball Company’s ball. This brings into focus the area of greatest discussion about using AVH values. Over 72% of the final value is made up from the surface and 3/4 radius hardness readings. So AVH tells us relatively little about how a ball is going to perform once it has worn past that stage.
The cross sectional hardness profile tells the full ‘inside story’.
Q What kind of performance will the ball in illustration ‘B’ below give?
A Once the ball has worn down to approximately 2/3 diameter, the remainder will wear away very quickly.
Q How will this affect the mill output?
