Address
304 North Cardinal
St. Dorchester Center, MA 02124
Work Hours
Monday to Friday: 7AM - 7PM
Weekend: 10AM - 5PM
grinding media for gold mining
- High Hardness & Low Abrasion Performance
- 50,000+ Tons Annual Grinding Media Capacity
- ISO 9001 Certified Strict Quality Control
- Custom Grinding Media Solutions Worldwide
- Advanced CNC Forging & Heat Treatment Technology
Our forged steel balls—a core type of industrial grinding media and mining grinding balls—are manufactured through precision hot forging technology: metal billets are heated to 700-1300 °C to achieve plastic deformation, then pressurized via professional metal forging processes. This advanced forging method eliminates smelting defects such as as-cast looseness, optimizes the metal microstructure and refines metal streamlines, fundamentally boosting the wear resistance and structural strength of the forged grinding balls. For superior abrasion resistance, we select only high-quality raw materials including national standard 60Mn, 65Mn steel, and our self-developed high-efficiency wear-resistant alloy steel—all sourced from large national steel mills. Material quality directly determines 80% of the forging performance, and we prioritize high manganese steel for its excellent impact resistance, enhanced structural strength, superior wear resistance and anti-fracture properties, ensuring our grinding steel balls perform stably in harsh industrial grinding conditions.
Renowned for their cost-effectiveness and durable performance, our forged steel balls are highly favored by global customers and have been widely adopted by international mining giants including Rio Tinto, BHP Billiton and Anglo Gold, making them the preferred ball mill steel balls for large-scale industrial grinding operations worldwide.
Core Product Features of Forged Steel Balls
- Ultra-low breakage rate: ≤0.5% for 25mm-80mm forged grinding balls, ≤1% for 90mm-140mm specifications—far lower than industry average, reducing grinding media consumption and replacement costs;
- High & gradient-distributed hardness: Surface hardness reaches HRC57-67, volume hardness HRC56-64, with high and uniformly distributed overall hardness for consistent and efficient grinding performance;
- Superior dimensional stability: No roundness loss, no deformation during long-term use, with excellent abrasion resistance to maintain grinding efficiency;
- Strong corrosion resistance: Excellent acid and alkali resistance, specially designed for wet ball mills in various mines, adapting to corrosive grinding working conditions of metallurgical and chemical industries.
Applied Fields
Our forged steel balls are widely used in ball mill equipment across a variety of industrial sectors, including large metallurgical mines (gold, copper, iron, aluminum, nonferrous metals, rare metals, etc.), cement building materials, coal slurry power plants, chemical plants, ceramic coatings, quartz sand and silica sand plants. As versatile industrial grinding media, they are the ideal grinding solution for both dry and wet ball mills in mining and industrial production.
Professional Production Process Lines
We offer two mature, high-precision production processes for forged steel balls, ensuring flexible production capacity and consistent product quality for all specifications (20-150mm):
Rotary Cut Steel Ball Production Process
Raw Material Inspection → Intermediate Frequency Furnace Heating → Spinning into Balls → Quenching Treatment → Tempering Treatment → Finished Product Inspection → Packaging
Forging Steel Ball Production Process
Raw Material Inspection → Feeding → Intermediate Frequency Furnace Heating → Forging (Roll Forging) into Balls
Chemical Composition
We strictly control the chemical composition of all our forged steel balls (20-150mm), with strict limits on harmful elements to ensure stable performance and wear resistance:
| Spec.(mm) | C(%) | Si(%) | Mn(%) | S(%) | P(%) | Cr(%) | Ni(%) | Cu(%) |
| 20-150mm | 0.5-0.9 | 0.17-0.37 | 0.7-1.2 | < 0.035 | < 0.035 | <1 | < 0.25 | < 0.25 |
Mechanical Properties
Our forged steel balls are available in four high-performance material grades (A/B/C/D), with tailored hardness and impact value for different diameters (25-150mm), ensuring perfect matching with various grinding equipment and process requirements:
| Steel ball diameter（mm） | A type material | A type material | A type material | Type B material | Type B material | Type B material | C type material | C type material | C type material | D type material | D type material | D type material |
| Surface hardness (HRC) | Inner hardness (HRC) | Impact value (J/CM2) | Surface hardness (HRC) | Inner hardness (HRC) | Impact value (J/CM2) | Surface hardness (HRC) | Inner hardness (HRC) | Impact value (J/CM2) | Surface hardness (HRC) | Inner hardness (HRC) | Impact value (J/CM2) | |
| φ25 | 60-65 | 58-63 | ≥12 | |||||||||
| φ30 | 60-65 | 55-60 | ≥12 | |||||||||
| φ35 | 60-65 | 55-60 | ≥12 | |||||||||
| φ40 | 60-65 | 55-63 | ≥12 | 60-65 | 60-65 | ≥12 | ||||||
| φ50 | 60-65 | 45-50 | ≥12 | 60-65 | 60-65 | ≥12 | ||||||
| φ60 | 60-65 | 42-47 | ≥12 | 60-65 | 60-65 | ≥12 | ||||||
| φ70 | 60-65 | 40-45 | ≥12 | 60-65 | 60-65 | ≥12 | ||||||
| φ75 | 60-65 | 40-45 | ≥12 | 60-65 | 60-65 | ≥12 | ||||||
| φ80 | 60-65 | 37-42 | ≥12 | 60-65 | 60-65 | ≥12 | ||||||
| φ90 | 60-65 | 37-42 | ≥12 | 58-63 | 52-60 | ≥12 | ||||||
| φ100 | 58-63 | 37-42 | ≥12 | 53-58 | 42-58 | ≥12 | 58-62 | 58-60 | ≥14 | 60-65 | 60-65 | ≥14 |
| φ110 | 55-63 | 35-40 | ≥12 | 53-58 | 45-50 | ≥12 | 58-62 | 58-60 | ≥14 | 60-65 | 60-65 | ≥14 |
| φ120 | 55-63 | 35-40 | ≥12 | 53-58 | 45-50 | ≥12 | 55-62 | 58-60 | ≥14 | 60-65 | 60-65 | ≥14 |
| φ125 | 50-55 | 35-40 | ≥12 | 53-58 | 45-50 | ≥12 | 55-62 | 52-58 | ≥14 | 60-65 | 58-63 | ≥14 |
| φ130 | 50-55 | 35-40 | ≥12 | 53-58 | 40-45 | ≥12 | 55-58 | 50-55 | ≥14 | 60-65 | 58-63 | ≥14 |
| φ140 | ≥12 | 53-58 | 40-45 | ≥12 | 55-58 | 45-55 | ≥14 | 60-65 | 55-60 | ≥14 | ||
| φ150 | ≥12 | 53-58 | 40-45 | ≥12 | 55-58 | 40-45 | ≥14 | 60-65 | 53-58 | ≥14 |
Dimension Series of Forged Grinding Balls
Our forged steel balls cover a complete diameter range (20-150mm) with strict diametrical tolerance, and we provide clear weight and quantity parameters for easy procurement and matching:
| NOMINAL DIAMETER(mm)(INS) | DIAMETRICAL TOLERANCE(mm) | APPOX AVERAGE WEIGHT PER BALL(g) | AVERAGE NUMBER OF BALLS PER MT |
| 20 (4/5) | +2/-1 | 32 | 31250 |
| 25 (1) | +2/-1 | 64 | 15625 |
| 30 (11/4) | +2/-1 | 116 | 8620 |
| 40 (11/2) | +2/-1 | 263 | 3802 |
| 50 (2) | +3/-1 | 513 | 1949 |
| 60 (21/2) | +3/-1 | 888 | 1126 |
| 70 (23/4) | +3/-1 | 1490 | 671 |
| 80 (31/4) | +3/-1 | 2104 | 475 |
| 90 (33/4) | +4/-2 | 2996 | 334 |
| 100 (4) | +4/-2 | 4110 | 243 |
| 110 (41/2) | +4/-2 | 5070 | 183 |
| 120 (5) | +4/-2 | 7102 | 141 |
| 130 (51/4) | +4/-2 | 9030 | 111 |
| 140 (51/2) | +4/-2 | 11278 | 89 |
| 150 (6) | +4/-2 | 13872 | 72 |
Packaging
We offer two robust packaging solutions for our forged steel balls to ensure safe transportation and storage for global delivery: 1000kg ton bag or iron drum packaging (850-900KG per drum).
