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Polybasic Alloyed Grinding Ball
 
  Polybasic Alloyed Grinding Ball Chemical Composition
Kind
Chemical Composition (%)
C
Si
Mn
Cr
Mo
Cu
Ni
Nb
Ti
Zr
V
B
P
S
PolybasicⅠ
1.8-3.2
0.5-1.5
0.4-1.5
3.5-8
≤0.5
≤0.8
≤0.5
≤0.2
≤0.5
≤0.5
≤0.5
≤0.1
≤0.10
≤0.10
PolybasicⅡ
1.8-3.2
0.5-1.5
0.1-0.8
8-11
≤0.5

≤0.5

≤0.5
≤0.2
≤0.5
-
-

≤0.1

≤0.1
≤0.10

Machanics Properties and Microstructure

Kind
Hardness(HRC)
 
Impact Value ak(j/cm2)
 
Microstructure
Time of Falling Balls
PolybasicⅠ
48-56
≥2.0
P+C
<Φ80
≥13000
≥Φ80
≥16000
PolybasicⅡ
58-64
≥3.5
M+C
<Φ80
≥15000
≥Φ80
≥8000

Specification and Avoirdupois

Ball Diameter(mm)
Weight of Each Ball(kg)
 
Pcs/ton
 
Φ20
0.0322
31056
Φ25
0.063
15873
Φ30
0.11
9091
Φ40
0.257
3891
Φ50
0.50
2000
Φ60
0.867
1153
Φ70
1.37
729
Φ80
2.05
487
Φ90
2.9
345
Φ100
4.00
250
Φ110
5.3
188
Φ120
6.80
147
Φ125
7.75
129
Φ130
8.74
114
Φ150
13.5
74

Capsule Ball Chemical Composition (%)

C Si Mn Cr Mo Cu S P
1.8-3.2 0.5-1.5 0.4-1.5 0.8-3.5 0-0.6 0-0.6 <0.15 <0.15

Mechanical Properties of Products

Microstructure
Impact Value ak(j/cm2)
Hardness (HRC)
P+C
>1.5
45-50
P-Pearlite C-Carbide

Specifcation Weight

Specifcation Weight of Each Ball(kg) Specifcation Weight of Each Ball(kg)
Φ30×60×39×16 0.28 Φ64×128×89×36 2.5
Φ34×68×51×16 0.46 Φ72×144×99×44 3.95
Φ42×84×63×26 0.75 Φ79×158×109×44 5.22
Φ48×96×72×30 1.25 Φ86×172×119×48 6.75
Φ57×114×83×34 2.0 Φ90×125×90×47 5.1


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