SAG Balls

Molycop’s SAG milling product range is specifically designed for today’s high-impact SAG milling environments. Our innovative manufacturing process results in SAG balls with high impact resistance and superior wear performance.

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Product Features

Size: SAG milling grinding media are available in sizes from 94mm to 160mm or 3.5 inches to 6.25 inches
Chemistry: SAG ball chemistry is controlled via a robust internal quality system
Hardness: SAG ball hardness is achieved using carefully selected heat treatment variables specifically designed for each alloy
Density: The theoretical apparent packing density of the SAG balls in a ball charge is 4,520 kg/m3 or 282 lbs/cu-ft

Product Overview

Molycop’s range of SAG (semi-autogenous grinding) balls is built for impact and superior wear resistance. Using innovative manufacturing processes Molycop produces a standard SAG ball and the Next Generation (NG) ball. High-carbon alloy steel bars are used in the production of SAG balls with forging and heat treatment processes to provide optimum wear and impact resistance.

Product Typical Uses

SAG balls are used primarily by large-scale mining operations to grind ores including copper, gold and iron ore into smaller particles in SAG mills. Molycop’s SAG ball series is used for grinding operations in which high impact breakage resistance and high wear resistance are the main ball attributes required.

Product Benefits

Molycop’s SAG ball delivers:

superior wear resistance
optimum impact resistance.

Technical Data

Ball Diameter (in)

Minimum Mass (g)

Maximum Mass (g)

Ball Diameter (mm)

Minimum Mass (g)

Maximum Mass (g)

3.5

2869

3156

3392

3731

4.0

4283

4712

105

4728

5201

4.5

6099

6708

115

6211

6832

5.0

8366

9202

125

7977

8774

5.25

9684

10653

133

9608

10569

5.5

11135

12248

140

11207

12327

6.0

14456

15902

150

13784

15162

6.25

16339

17973

160

16728

18401

Ball Diameter		C		Mn		Si		Cr		Mo
in.	mm.	Min.	Max.	Min.	Max.	Min.	Max.	Min.	Max.	Min.	Max.
3.5	94	0.75	1.00	0.75	1.25	0.10	0.50	0.50	1.00	0.00	0.10
4.0	105	0.75	1.00	0.75	1.25	0.10	0.50	0.50	1.00	0.00	0.10
4.5	115	0.70	0.90	0.75	1.25	0.10	0.50	0.50	1.00	0.00	0.10
5.0	125	0.70	0.90	0.75	1.25	0.10	0.50	0.75	1.25	0.00	0.10
5.25	133	0.70	0.90	0.75	1.25	0.10	0.50	0.75	1.25	0.00	0.10
5.5	140	0.70	0.90	0.75	1.25	0.10	0.50	0.75	1.25	0.00	0.20
6.0	150	0.70	0.90	0.75	1.25	0.10	0.50	0.75	1.25	0.00	0.20
6.25	160	0.70	0.90	0.75	1.25	0.10	0.50	0.75	1.25	0.00	0.20
S Max (0.040)						P Max (0.035)

Ball Diameter		Average Surface Hardness		Average Volumetric Hardness
in.	mm.	Min.	Max.	Min.	Max.
3.5	94	55	61	55	61
4.0	105	55	61	55	61
4.5	115	55	61	55	61
5.0	125	55	61	55	61
5.25	133	55	61	55	61
5.5	140	55	61	55	61
6.0	150	53	61	53	61
6.25	160	53	61	53	61
The above is intended as a guide only. Individual ball hardness readings may fall outside the range listed above.