SAG Mill Grinding Ball
SAG Mill Grinding Ball is specially designed to withstand the severe impact and abrasion conditions found in semi-autogenous grinding mills. With excellent toughness and wear resistance, the ball helps maintain stable grinding efficiency while reducing breakage rates and media consumption during operation.
Introduction of the product
SAG Mill Grinding Ball is manufactured from premium alloy steel through advanced forging and heat-treatment processes. The optimized production technology ensures a dense internal structure and balanced mechanical properties, making the balls suitable for demanding large-scale grinding applications.

Application in grinding machines and areas
Machines | Industries |
·Ball mills | ·Mining industry |
·Power stations | |
·Tower mills | ·Cement industry |
·Coal grinding machine | ·Steel Industry |
·Bearing | ·Chemical Industry |
·Metallurgical industry |
SAG Mill Grinding Ball is widely used in gold mines, copper mines, iron ore projects, and other mineral processing plants. It is specifically developed for SAG mills but can also support various heavy-duty grinding operations where high impact resistance is required.
Technical data
Chemical Composition (%) | ||||||
Steel Specification | C | Mn | Si | Cr | S | P |
40Cr | 0.37-0.44 | 0.50-0.80 | 0.17-0.37 | 0.80-1.15 | ≤0.035 | ≤0.035 |
42CrMo | 0.38-0.45 | 0.50-0.80 | 0.17-0.37 | 0.90-1.25 | ≤0.035 | ≤0.035 |
60Mn | 0.57-0.65 | 0.70-1.00 | 0.17-0.37 | ≤0.25 | ≤0.035 | ≤0.035 |
65Mn | 0.62-0.72 | 0.90-1.20 | 0.17-0.37 | ≤0.25 | ≤0.035 | ≤0.035 |
#45/C45 | 0.42-0.54 | 0.50-0.80 | 0.17-0.37 | ≤0.15 | ≤0.035 | ≤0.035 |
ZT-10 | 0.60-0.78 | 0.65-1.33 | 0.25-0.65 | ≤0.45 | ≤0.035 | ≤0.035 |
B2 | 0.70-0.92 | 0.70-1.00 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.035 |
B3 | 0.52-0.65 | 0.66-1.00 | 1.30-1.90 | 0.74-1.20 | ≤0.030 | ≤0.030 |
B4 | 0.65-0.75 | 0.50-0.70 | 1.20-1.40 | 0.85-1.00 | ≤0.025 | ≤0.025 |
B6 | 0.75-0.90 | 0.80-1.02 | 0.17-0.37 | 0.88-0.98 | ≤0.035 | ≤0.035 |
BU | 0.95-1.05 | 0.95-1.05 | 0.15-0.35 | 0.45-0.55 | ≤0.035 | ≤0.035 |
BL | 0.55-0.75 | 0.65-0.85 | 0.15-0.35 | 0.70-1.20 | ≤0.035 | ≤0.035 |
BG | 0.90-1.05 | 0.35-0.95 | 0.15-0.35 | 1.00-1.70 | ≤0.035 | ≤0.035 |
Physical Features | |||||
Diameter (mm) (inches) | Surface Hardness (HRC) | Diameter Tolerance (mm) | Impact Value (J/cm²) | Breakage Rate (%) | Drop Test (times) |
20 (0.79) | >60 | +2.0 -1.0 | ≥12 | ≤1 | >15000 |
25 (0.98) | |||||
30 (1.18) | |||||
40 (1.57) | |||||
50 (1.97) | |||||
60 (2.36) | +3.0 -1.5 | ||||
65(5.56) | |||||
70 (2.76) | |||||
75 (3.00) | |||||
80 (3.15) | |||||
90 (3.54) | |||||
100 (3.94) | +4.0 -2.0 | ||||
120 (4.72) | >58 | ||||
125 (4.92) | |||||
140 (5.51) | >55 | +5.0 -3.0 | |||
150 (5.91) | |||||
Quality Control Technology and Equipment

Each batch of SAG Mill Grinding Ball undergoes comprehensive inspections including chemical composition analysis, hardness testing, impact testing, and drop testing. These quality control measures help ensure consistent performance, low breakage rates, and reliable service life.
Plants and Production Equipment

Exhibitions


SAG Mill Grinding Ball is regularly featured at international mining exhibitions and mineral processing conferences. These events provide opportunities to showcase product performance, exchange technical expertise, and establish strong relationships with mining companies worldwide.
Why choose us
Choosing SAG Mill Grinding Ball from ZenTi means partnering with a manufacturer focused on quality, innovation, and dependable supply. With advanced production facilities, strict quality management, and annual production capacity exceeding 150,000 tons, we provide reliable grinding media solutions for mining operations around the world.
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