Grinding media steel ball
1. Forged steel grinding balls
Size: 20mm-150mm
Hardness:HRC55-65
Chemical elements: C: 0.52-0.65; Si: 0.2-0.4; Mn: 0.7-1.2; S & P: 0.04Max; Cr: 0.25Max.
2. RCAB-II New Materials Forged Steel Balls
Size: 40mm-150mm
Hardness:HRC58-65
Chemical elements: C: 0.72-0.82; Si: 0.17-0.37; Mn: 0.7-0.8; S & P: 0.04Max;
Cr: 0.28-0.60.
3. High chrome cast grinding balls
Size: 20mm-120mm
Hardness:HRC58-65; Chrome content:11-14%; 14-17%; 18-22%
4. Low chrome cast balls
Size: 20mm-120mm
Hardness:HRC45-55; Chrome content:1-3.5%
1.Forged steel grinding balls
|
Chemical elements of forged steel balls
|
|||||
|
C
|
Si
|
Mn
|
Cr
|
S
|
P
|
|
0.50-0.65
|
0.15-0.37
|
0.6-1.2
|
≤0.25
|
≤0.04
|
≤0.04
|
|
0.7-0.9
|
0.45-0.75
|
0.7-1.25
|
0.11-0.4
|
≤0.04
|
≤0.04
|
|
Nominal diameter
|
Diameteical
Tolerance
|
Weight of single ball in average
|
Surface hardness
|
Impact toughness
|
|
(mm)
|
(mm)
|
(g)
|
(HRC)
|
(j/cm2 )
|
|
Φ20
|
+2 -1
|
32
|
50-65
|
≥12
|
|
Φ25
|
+2 -1
|
64
|
50-65
|
≥12
|
|
Φ30
|
+2 -1
|
110
|
50-65
|
≥12
|
|
Φ40
|
+2 -1
|
263
|
50-65
|
≥12
|
|
Φ50
|
+2 -1
|
513
|
50-65
|
≥12
|
|
Φ60
|
+3 -2
|
888
|
|
|
|
Φ70
|
1410
|
|||
|
Φ80
|
2104
|
|||
|
Φ90
|
2996
|
|||
|
Φ100
|
4110
|
|||
|
Φ110
|
+4 -2
|
5457
|
45-60
|
|
|
Φ120
|
7102
|
|||
|
Φ130
|
9030
|
|||
|
Φ140
|
+4 -3
|
11278
|
||
|
Φ150
|
13871
|
2. casting grinding balls
|
Item
|
Brand
|
C
|
Si
|
Mn
|
Cr
|
Mo
|
Cu
|
Ni
|
P
|
S
|
|
High chrome casting iron ball
|
JCCr20
|
2.0-3.0
|
≤1.0
|
0.5-1.5
|
18-22
|
0-2.5
|
0-1.2
|
0-1.5
|
≤0.10
|
≤0.10
|
|
Item
|
Brand
|
C
|
Si
|
Mn
|
Cr
|
Mo
|
Cu
|
Ni
|
P
|
S
|
|
High chrome casting iron ball
|
JCCr15
|
2.0-3.0
|
≤1.0
|
0.5-1.5
|
14-17
|
0-3.0
|
0-1.0
|
0-1.5
|
≤0.10
|
≤0.10
|