Forged steel grinding balls

The 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
  • Surface quality inspection
  • Dimensional inspection
  • Low magnification analysis
  • Dye penetrant inspection
  • 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
   
  1. 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
  Packing Details:
  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  

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