| the performance of the steel ball: |
| type/index |
metallurgical structure |
impact value(Unnotched) |
rigidityHRc |
| high chromium alloy |
M+C |
¡Ý3.0J/cm2 |
56¡«62 |
| low chromium alloy |
P+C |
¡Ý1.6J/cm2 |
45¡«55 |
| M- Martensite |
C-carbide |
P-pearlite |
|
|
 |
steel ball specification and weight: |
| |
| diameter(mm) |
per weight(kg) |
per ton weight (number) |
| ¦Õ15 |
0.0242 |
41322 |
| ¦Õ20 |
0.0322 |
31056 |
| ¦Õ25 |
0.063 |
15873 |
| ¦Õ30 |
0.11 |
9091 |
| ¦Õ40 |
0.257 |
3891 |
| ¦Õ50 |
0.50 |
2000 |
| ¦Õ60 |
0.867 |
1153 |
| ¦Õ70 |
1.37 |
729 |
| ¦Õ80 |
2.05 |
487 |
| ¦Õ90 |
2.90 |
345 |
| ¦Õ100 |
4.00 |
250 |
| ¦Õ110 |
5.30 |
188 |
| ¦Õ120 |
6.80 |
147 |
| type¦Õ125 |
7.75 |
129 |
| ¦Õ130 |
8.74 |
114 | |
chemical ingredient of the steel ball:
|
| type/ingredient |
C |
Si |
Mn |
Cr |
Mo |
Cu |
S |
P |
| high chromium alloy |
1.7¡«3.3 |
0.3¡«1.2 |
1.3¡«2.6 |
11¡«17 |
0¡«2.0 |
0¡«1.0 |
¡Ü0.10 |
¡Ü0.10 |
| low chromium alloy |
2.2¡«3.6 |
0.5¡«1.2 |
0.5¡«1.5 |
1.0¡«3.0 |
0¡«2.0 |
0¡«1.0 |
¡Ü0.15 |
¡Ü0.15 | |
falling ball test result:
|
| the times of the ball drop from the vertical height of 3.5m |
| high chromium ball |
£¼¦Õ80(mm) |
more than 18000 |
| ¡Ý¦Õ80(mm) |
more than 18000 |
| low chromium ball |
£¼¦Õ80(mm) |
more than 15000 |
| ¡Ý¦Õ80(mm) |
more than 8000 |
|
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