1.Established in 2000, We Jinan Zhongwei casting and forging grinding ball Co.,Ltd, are leading manufacturer and professional exporter of grinding media balls in China.with the annual output of 50,000 to 70,000 metric tons.Our products grinding media balls are mainly exported to more than 20 countries and regions in the world,such as Japan,Korea,South Africa,Zambia,Malaysia,Phillipines,Indonesia,Mongolia,Australia,UAE,Chile etc.
1.Chemical composition:
|
Item
|
C
|
Cr
|
Si
|
Mn
|
S
|
P
|
Cu
|
Mo
|
Hardness
|
|
Low Chrome
|
1.8-3.5
|
1-3.5
|
≤1.2
|
≤1.5
|
≤0.15
|
≤0.15
|
≤0.5
|
≤1.0
|
≥45
|
|
Medium Chrome
|
1.8-3.3
|
4-9
|
≤1.2
|
≤1.8
|
≤0.15
|
≤0.15
|
≤1.0
|
≤1.5
|
≥50
|
|
High Chrome
|
1.6-3.3
|
10-15
|
≤1.0
|
≤2.5
|
≤0.10
|
≤0.10
|
≤1.5
|
≤1.0
|
≥55
|
|
Higher Chrome
|
1.6-3.3
|
15-18
18-27
|
≤1.0
|
≤2.5
|
≤0.10
|
≤0.10
|
≤1.5
|
<2.0
|
≥60
|
2.Specification and Hardness of Grinding Ball
|
Nominal
diameter
(mm)
|
Diameteical
tolerance
(mm)
|
Weight of Single
of forging ball
in average
|
Number of piece of
One ton forging ball
in average
|
Surface
hardness
|
Impact
toughness
|
|
DIA 20
DIA 25
DIA 30
DIA 40
DIA 50
|
+2
-1
|
32
64
110
263
513
|
31250
15625
9090
3802
1949
|
55-65
|
≥12
|
|
DIA 60
DIA 70
DIA 80
DIA 90
DIA 100
|
+3
-2
|
888
1410
2104
2996
4110
|
1126
709
475
333
243
|
||
|
DIA 110
DIA 120
DIA 130
|
+4
-2
|
5457
7102
9030
|
182
140
110
|
||
|
DIA 140
DIA 150
|
+4
-3
|
11278
13871
|
88
72
|