Mill Grinding Balls, Grinding Cylpebs and Grinding Rods
PRODUCT PARAMETERS
- Type: Forged Steel Grinding Balls
- Diameters(mm): 100 mm to 165 mm (4” to 6.5”)
- Application: mining, cement production, power plants, chemistry industries
- High hardness
- Good wear resistance
- High impact toughness
- Rear earth grinding ball available (HRC up to 60-65)
Description
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FAQ
Description
Forged Steel Balls for SAG mills
Forged steel ball specifically engineered for use in SAG mills. Diameters ranging from 100 mm to 165 mm (4” to 6.5”).
Diameters and Roundness:
| Diameter (mm) | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 110 | 120 | 125 | 150 |
| Diameter roundness(mm) | ±2 | +3, -2 | +4, -3 | +5, -4 | ||||||||
| Roundness(%) | ≤2 | ≤3 | ≤4 | ≤5 | ||||||||
Technical Parameter
| Material | Breakage rate | Hardness(HRC) | Impact value(J/cm²） | Drop times(times) | Micro structure |
| 45# | <1% | ≥45 | ≥12 | ≥8000 | M+C |
| 60Mn | <1% | ≥55 | ≥12 | ≥12000 | M+C |
| 65Mn | <1% | ≥58 | ≥12 | ≥12000 | M+C |
| 70Mn | <1% | ≥60 | ≥12 | ≥12000 | M+C |
| 40Cr | <1% | ≥55 | ≥12 | ≥12000 | M+C |
| 70Cr2 | <1% | ≥58 | ≥12 | ≥12000 | M+C |
| B-2 | <1% | ≥58 | ≥12 | ≥15000 | M+C |
| B-3 | <1% | ≥60 | ≥12 | ≥15000 | M+C |
Chemical composition
| Material | C（%） | Si（%） | Mn（%） | Cr（%） | Cu（%） | Mo（%） | P（%） | S（%） | Ni(%) |
| 45# | 0.42-0.50 | 0.17-0.37 | 0.5-0.80 | 0-0.25 | 0-0.25 | 0-0.30 | 0-0.035 | 0-0.035 | 0-0.30 |
| 60Mn | 0.57-0.65 | 0.17-0.37 | 0.70-1.0 | 0-0.25 | 0-0.25 | 0-0.30 | 0-0.035 | 0-0.035 | 0-0.30 |
| 65Mn | 0.62-0.70 | 0.17-0.37 | 0.90-1.0 | 0-0.25 | 0-0.25 | 0-0.30 | 0-0.035 | 0-0.035 | 0-0.30 |
| 70Mn | 0.67-0.75 | 0.17-0.37 | 0.90-1.20 | 0-0.25 | 0-0.25 | 0-0.30 | 0-0.035 | 0-0.035 | 0-0.30 |
| 40Cr | 0.37-0.45 | 0.17-0.37 | 0.50-0.8 | 0.80-1.1 | 0-0.25 | 0-0.30 | 0-0.035 | 0-0.035 | 0-0.30 |
| 70Cr2 | 0.65-0.75 | 0.20-0.30 | 0.75-0.90 | 0.55-0.70 | 0-0.25 | 0-0.30 | 0-0.030 | 0-0.030 | 0-0.30 |
| B-2 | 0.70-0.80 | 0.17-0.37 | 0.70-0.80 | 0.50-0.60 | 0-0.25 | 0-0.30 | 0-0.035 | 0-0.035 | 0-0.30 |
| B-3 | 0.58-0.66 | 1.2-1.6 | 0.65-0.80 | 0.70-0.90 | 0-0.25 | 0-0.30 | 0-0.035 | 0-0.035 | 0-0.30 |
Engineering Advantages of Our SAG Mill Forged Balls
- Optimized Microstructure for Highest Impact Resistance
- Controlled Wear Rate & Shape Retention
- Reduced Risk of Catastrophic Breakage
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FAQs
What is the difference between forged grinding balls and cast grinding balls?
Forged grinding balls are made by heating and shaping high-carbon or alloy steel under high pressure, resulting in superior hardness, impact resistance, and longevity. Cast grinding balls are produced by melting and pouring metal into molds, offering a cost-effective solution for less demanding grinding environments. Forged balls excel in high-impact mining operations, while cast balls are ideal for lower-impact scenarios like cement or coal grinding.
How do I choose between forged and cast grinding balls?
Choose forged balls for high-impact, large-scale mining (e.g., copper, gold) where durability and low wear rates are critical.
Choose cast balls for cost-sensitive applications with softer materials (e.g., limestone, coal) or smaller operations.
Can it be customized as per our requirements?
Make amazing 60-degree bevel cuts with our 8-1/4 in. SKIL Worm Drive Skilsaw model SPT78W-01. This Skilsaw is powered by our largest 15 amp Dual-Field™ high torque motor so you will make the last cut as precisely as you did the first cut. Exclusive 60-degree bevel. High torque Dual-Field™motor. Legendary SKIL durability.
Can you customize the size and hardness of grinding media?
Yes! We offer fully customizable solutions. Specify your required diameter (e.g., 20–150mm for balls), hardness (HRC 50–65), and material composition to match your mill’s operating conditions (e.g., ore hardness, rotation speed).
What materials are used in your grinding rods and mine liners?
- Grinding Rods: Made from high-carbon steel or alloy steel, heat-treated for optimal wear resistance and toughness.
- Mine Liners: Constructed from high-manganese steel, chromium steel, or composite alloys to withstand abrasion and impact in mills.
What countries do you export to?
We ship globally, with major clients in South America, Africa, Australia, North America, and Southeast Asia.
How long is the production and delivery time?
Standard Products: 15–25 days after order confirmation.
Customized Orders: 25–35 days, depending on specifications.
Shipping: Delivery times vary by destination
What packaging do you use to ensure product safety?
Grinding balls/rods: Packed in steel drums or bulk bags with anti-rust treatment.
Mine liners: Wooden crates or pallets with waterproof wrapping.
How do you ensure product quality?
We enforce strict quality control:
100% surface defect checks before shipment.
Raw material inspection (spectral analysis).
Hardness and impact testing (Rockwell, Charpy tests).
How do you ensure product quality?
We enforce strict quality control:
100% surface defect checks before shipment.
Raw material inspection (spectral analysis).
Hardness and impact testing (Rockwell, Charpy tests).
