|
Forged Steel Ball1 Type and Chemical Composition of Forged Balls
|
Brand
|
Name
|
C
|
Mn
|
Si
|
Cr
|
S
|
P
|
V
|
|
ZW-1
|
50Mn
|
0.48-0.56
|
0.70-1.0
|
0.17-0.37
|
<0.25
|
<0.035
|
<0.035
|
|
|
ZW-2
|
60Mn
|
0.57-0.65
|
0.7-1.0
|
0.17-0.37
|
<0.25
|
<0.035
|
<0.035
|
|
|
ZW-3
|
65Mn
|
0.60-0.70
|
0.9-1.2
|
0.17-0.37
|
<0.25
|
<0.035
|
<0.035
|
|
|
ZW-4
|
B2
|
0.7-0.85
|
0.7-0.8
|
0.17-0.37
|
0.2-0.7
|
<0.03
|
<0.03
|
|
|
ZW-5
|
75SiMn
|
0.7-0.90
|
0.7-1.2
|
0.4-0.8
|
<0.25
|
<0.03
|
<0.03
|
|
|
ZW-6
|
Wear-resistant Alloy
|
0.5-0.65
|
0.4-1.0
|
1.4-1.8
|
0.9-1.2
|
<0.03
|
<0.03
|
0.1-0.2
|
Physical Property of Forged Balls
|
Brand
|
Name
|
Impact Test
(Ak.J/cm2)
|
Endurance test times
(5m)
|
Hardness (HRC)
|
Breakage
|
|
25mm-60mm
|
70mm-100mm
|
|
|
Surface
|
Core
|
Surface
|
Core
|
|
|
ZW-1
|
50Mn
|
>12
|
>10000
|
>56
|
>35
|
>56
|
>28
|
<1%
|
|
ZW-2
|
60Mn
|
>13
|
>10000
|
>58
|
>38
|
>58
|
>29
|
<1%
|
|
ZW-3
|
65Mn
|
>15
|
>12000
|
>60
|
>42
|
>60
|
>30
|
<1%
|
|
ZW-4
|
B2
|
>17
|
>12000
|
>60
|
>52
|
>60
|
>50
|
<1%
|
|
ZW-5
|
75SiMn
|
>16
|
>12000
|
>60
|
>50
|
>60
|
>48
|
<1%
|
|
ZW-6
|
Wear-resistant Alloy
|
>17
|
>12000
|
>60
|
>54
|
>60
|
>52
|
<1%
|
Weight and Microstructure of Forged Balls
|
(mm)
Nominal diameter
|
(mm)
Diametrical Tolerance
|
(kg)
Approx weight per ball
|
Average number
per MT
|
Microstructure
|
|
25
|
+1.5,-0.5
|
0.064
|
15625
|
M+B+C
(M-B-C-)(M-Martensite;
B-Bainitic;C-Carbide)
|
|
30
|
+1.5,-0.5
|
0.11
|
9090
|
|
40
|
+2.0,-1.0
|
0.26
|
3846
|
|
50
|
+2.0,-1.0
|
0.51
|
1961
|
|
60
|
+3.0,-2.0
|
0.89
|
1124
|
|
70
|
+3.0,-2.0
|
1.4
|
714
|
|
80
|
+3.0,-2.0
|
2.1
|
476
|
|
90
|
+3.0,-2.0
|
3
|
333
|
|
100
|
+4.0,-3.0
|
4.1
|
244
|
|
110
|
+4.0,-3.0
|
5.47
|
283
|
|
120
|
+4.0,-3.0
|
7.1
|
141
|
|
130
|
+4.0,-3.0
|
9.02
|
111
|
|
Brand
|
Name-
|
C
|
Si
|
Cr
|
Mn
|
S
|
P
|
Mo
|
Al
|
Micrst-
ructure
|
|
ZW-7
|
Specialhi-CrI
|
2.0-2.8
|
<1.0
|
22-32
|
0.5-2.0
|
<0.06
|
<0.08
|
micro
|
micro
|
M+C
|
|
ZW-8
|
Specialhi-CrII
|
2.0-2.8
|
<1.0
|
17-22
|
0.5-2.0
|
<0.06
|
<0.08
|
micro
|
micro
|
M+C
|
|
ZW-9
|
Specialhi-CrIII
|
2.2-3.0
|
<1.0
|
15-17
|
0.5-2.0
|
<0.06
|
<0.08
|
micro
|
micro
|
M+C
|
|
ZW-10
|
High-Cr
|
2.2-3.2
|
<1.0
|
41227
|
0.5-2.5
|
<0.06
|
<0.08
|
micro
|
micro
|
M+C
|
|
ZW-11
|
Medium-Cr
|
2.1-3.2
|
<1.2
|
41039
|
0.5-1.5
|
<0.06
|
<0.08
|
micro
|
micro
|
P+C
|
|
ZW-12
|
Low-Cr
|
2.2-3.5
|
<1.2
|
1.5-3.0
|
0.5-1.5
|
<0.06
|
<0.08
|
micro
|
micro
|
P+C
|
|
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