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Specifications
1.Top grade raw material2.hardness:58-67HRC
3.low breakage :real0.1%
4.Top wear resistance
5.high impact value
Ball Mill Forging Steel Grinding Ball
1. Chemical composition
Based on material,the forged steel balls are defined into 7 brands. And The chemical composition is shown in the following:
Brand | Material | C | Mn | Si | Cr | S | P | V |
Special-1 | 50MN | 0.48-0.56 | 0.70-1.0 | 0.17-0.37 | ≤0.25 | ≤0.035 | ≤0.035 |
|
Special-2 | 60MN | 0.57-0.65 | 0.70-1.0 | 0.17-0.37 | ≤0.25 | ≤0.035 | ≤0.035 |
|
Special-3 | 65MN | 0.60-0.70 | 0.90-1.20 | 0.17-0.37 | ≤0.25 | ≤0.035 | ≤0.035 |
|
Special-4 | 75Mn | 0.72-0.92 | 0.17-0.37 | 0.17-0.37 | 0.4-0.6 | ≤0.035 | ≤0.035 |
|
Special-5 | 75MnCr | 0.70-0.85 | 0.7-0.8 | 0.17-0.37 | 0.2-0.7 | ≤0.03 | ≤0.03 |
|
Special-6 | 75SiMn | 0.70-0.90 | 0.7-1.2 | 0.4-0.8 | ≤0.25 | ≤0.03 | ≤0.03 |
|
Special-7 | Wear-resistant Alloy | 0.5-0.65 | 0.4-1.0 | 1.4-1.8 | 0.9-1.2 | ≤0.03 | ≤0.03 | 0.1-0.2 |
2.Applied Field:
1).Cement Plants,
2).Mines,
3).Power stations,
4).Chemical Industries,
5).Grinding Mill, Ball mill, Coal mill.
3.Hardness of Grinding Steel Ball (HRC)
According to the theory and tests, the hardness of forged steel ball is shown in the following:
Brand | Material | Impact Test AK.J/cm2 | Endurance Test Times(5m) | Dia 25mm-60mm | Dia 70mm-100mm | ||
Surface | Core | Surface | Core | ||||
Special-1 | 50MN | ≥12 | ≥10000 | ≥56 | ≥48 | ≥56 | ≥40 |
Special-2 | 60MN | ≥13 | ≥10000 | ≥58 | ≥50 | ≥58 | ≥42 |
Special-3 | 65MN | ≥15 | ≥12000 | ≥60 | ≥50 | ≥60 | ≥42 |
Special-5 | 75MnCr | ≥17 | ≥12000 | ≥60 | ≥52 | ≥60 | ≥50 |
Special-6 | 75SiMn | ≥16 | ≥12000 | ≥60 | ≥50 | ≥60 | ≥48 |
Special-7 | Wear-resistant Alloy | ≥17 | ≥12000 | ≥60 | ≥54 | ≥60 | ≥52 |
4. Feature:
1) In general, forged steel ball has high hardness: surface hardness to 55-68 HRC, volume hardness of 50-63 HRC
2) impact toughness high: impact toughness more than 12 J / cm2.
3) broken rate is low: the actual broken rate is not higher than 1%.
4) loss of grinding forged steel ball round rate is low.
5.Packing
1) steel drums
2) flexible container bags
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