Forged Cast Iron Grinding Balls

Forged Cast Iron Grinding Balls

State-of-the-art production processes in all plants for Chengda Forged steel grinding balls. Chemical composition aligned with the newest standards in terms of high C & low gas level Strict quality control: from raw material to finished products including an impact resistance test for SAG mill balls to verify each batch

Inspection Process 1. Surface quality inspection 2. Dimensional inspection 3. Low magnification analysis 4. Dye penetrant inspection 5. Metallographic test 1. Chemical Composition of Forged steel grinding balls
Material Chemical elements
C Si Mn P/S Cr
B2 0.72-0.85 0.17-0.37 0.7-1.0 <0.025 0.4-0.6
60Mn 0.55-0.65 0.17-0.37 0.7-1.0 <0.04 <0.25
45# 0.42-0.50 0.17-0.37 0.5-0.8 <0.035 ≤0.25
B3 0.58-0.66 1.3-1.9 0.65-0.8 <0.025 0.7-0.9
2. Physical Property of Forged steel grinding balls
Material 25mm-50mmHRC 60mm-90mmHRC 100mm-125mmHRC
Surface Core Surface Core Surface Core
B2 60-65 58-62 58-63 50-55 56-60 40-45
60Mn 58-63 55-60 58-63 40-45 56-60 30-35
45# 55-58 45-55 55-58 30-35 50-55 25-30
B3 60-65 58-63 56-65 55-63
3. Specification of Forged Grinding Ball
Nominal Diameter Diameter Tolerance Weight of Single Ball In Average Numbers of Per Ton Ball In Average
(mm) (Inch) (mm) (g)
20 0.75''

+2

-1

32 31250
25 1'' 64 15625
30 1.25'' 110 9090
40 1.5'' 263 3802
50 2'' 513 1949
60 2.5''

+3 -2

888 1126
70 2.75 1410 709
80 3.25'' 2104 475
90 3.5'' 2996 333
100 4'' 4110 243
110 4.5''

+4 -2

5457 182
120 4.75'' 7102 140
130 5'' 9030 110
140 5.5''

+4 -3

11278 88
150 6'' 13871 72

1. Jumbo/PP bags: Net weight 1000Kgs, Gross Weight 1002KGS, Measurement 0.4CBM

2. Steel drums with wooden pallets: Net weight 850-950Kgs, Gross Weight 865-965KGS, Measurement 0.3CBM