A) High hardness, No breakage, Even wearing B)30 years experience in manufacturing C) Good wear resistance
1.Chemical composition:
NAME | C | Si | Mn | Cr | Mo | CU | P | S | Hardness |
LOW CHROMIUM | 2.2-3.5 | ≤ 1.2 | ≤ 1.5 | 0.8-3.5 | ≤ 1.0 | ≤ 0.5 | ≤ 0.15 | ≤ 0.15 | ≥45 |
MEDIUM CHROMIUM | 2.0-3.3 | ≤ 1.2 | ≤ 1.8 | 4.0-9.0 | ≤ 1.5 | ≤ 1.0 | ≤ 0.15 | ≤ 0.15 | ≥50 |
HIGH CHROMIUM | 1.6-3.3 | ≤ 1.0 | ≤ 2.5 | 10-18 | ≤ 1.0 | ≤ 1.5 | ≤ 0.10 | ≤ 0.10 | ≥55 |
HIGHER CHROMIUM | 2.0-3.3 | ≤ 1.0 | ≤ 2.5 | 22-25 | ≤ 2.0 | ≤ 1.5 | ≤ 0.10 | ≤ 0.10 | 60≥ |
2.Specification and Hardness of Grinding Ball
Nominal diameter (mm) | Weight of Single of casting ball in average(kg) | Number of piece of One ton forging ball in average | Surface hardness | Impact toughness |
DIA 20 DIA 25 DIA 30 DIA 40 DIA 50 | 0.0322 0.063 0.11 0.257 0.50 | 31056 15873 9091 3891 2000 |
45-60 |
≥12 |
DIA 60 DIA 70 DIA 80 DIA 90 DIA 100 | 0.867 1.37 2.05 2.90 4.00
| 1153 729 487 345 250 | ||
DIA 110 DIA 120 DIA 125 | 5.30 6.80 7.75 | 188 147 129 | ||
DIA 130
| 8.74
| 114
|
3.production technics
Raw material (waste steel,waste iron) factory inspection - blending - melt- composition inspection- casting- cooling and solidification - demould - clean and polish-inspection-quenching- hardness inspection-tempering-inspection -warehousing
Notes:Only the high chromium have the process of quenching and tempering.But the low and medium chromium have the only tempering process.
diameter 80mm casting steel ball for ball mill
