1. Diameter tolerance and Length tolerance
|
Diameter （mm)
|
Φ<30
|
30<Φ<60
|
60<Φ<80
|
80<Φ<100
|
Φ>100
|
|
Tolerance of diameter (mm)
|
+1，-1
|
+1.5，-1
|
+2,-1
|
+2.5，-1
|
+3，-1
|
2.Chemical composition
|
Name
|
Brand
|
Chemical composition（%）
|
|
|
C
|
Si
|
Mn
|
Cr
|
Mo
|
Cu
|
Ni
|
P
|
S
|
|
Chrome alloy casting iron ball
|
Cr26
|
2.0-3.3
|
1.2max
|
0.3-1.5
|
>23.0-30.0
|
0-3.0
|
0-1.2
|
0-1.5
|
≤0.10
|
≤0.06
|
|
Cr20
|
2.0-3.3
|
1.2max
|
0.3-1.5
|
>18.0-23.0
|
0-3.0
|
0-1.2
|
0-1.5
|
≤0.10
|
≤0.06
|
|
Cr15
|
2.0-3.3
|
1.2max
|
0.3-1.5
|
>14.0-18.0
|
0-3.0
|
0-1.2
|
0-1.5
|
≤0.10
|
≤0.06
|
|
Cr12
|
2.0-3.3
|
1.2max
|
0.3-1.5
|
>10.0-14.0
|
0-3.0
|
0-1.2
|
0-1.5
|
≤0.10
|
≤0.06
|
|
Cr8
|
2.1-3.3
|
2.2max
|
0.3-1.5
|
7.0-10.0
|
0-1.0
|
0-0.8
|
－
|
≤0.10
|
≤0.06
|
|
Cr5
|
2.1-3.3
|
1.5max
|
0.3-1.5
|
4.0-6.0
|
0-1.0
|
0-0.8
|
－
|
≤0.10
|
≤0.10
|
|
Cr2
|
2.1-3.6
|
1.5max
|
0.3-1.5
|
1.0-3.0
|
0-1.0
|
0-0.8
|
－
|
≤0.10
|
≤0.10
|
3.Technical specification
|
Name
|
Brand
|
(mm)
Diameter
|
(HRC)
Hardness
|
Breakage rate
|
(J/cm²)
Impact value
|
Drop times
|
Micro structure
|
|
Chrome alloy casting iron ball
|
Cr26
|
17-150
|
>58
|
<1%
|
>7
|
≥12000
|
M+C
|
|
Cr20
|
17-150
|
>58
|
<1%
|
>6
|
≥12000
|
M+C
|
|
Cr15
|
17-150
|
>58
|
<1%
|
>5
|
≥12000
|
M+C
|
|
Cr12
|
17-150
|
>58
|
<1%
|
>3.5
|
≥12000
|
M+C
|
|
Cr8
|
17-150
|
>58
|
<1%
|
>3
|
≥12000
|
M+C
|
|
Cr5
|
17-150
|
>47
|
<1%
|
>2
|
≥10000
|
M+C
|
|
Cr2
|
17-150
|
>45
|
<1%
|
>1.5
|
≥8000
|
P+C
|
English
