Grinding
balls are available in sizes from 19mm to 150mm diameter, In the
'As Forged' Condition Brinell hardness 260/310.
'Heat treated' condition 19mm to 65mm Hardness up to 700 Brinell,
70mm to 100mm Hardness 400/500 Brinell,
Typical analysis : Car. 07/.09% Mn .07/.09%.
Carbon
Chrome En 31: 25mm to 150mm Hardness 300/400 Brinell,
Typical analysis: Car 90/1.20% Mn. 30/75 Chr. 90/1.6%.
| Bearing in mind forging tolerance the approximate weights and measurements
of steel balls are as follows: |
|
Size
mm |
(ins) |
|
Weight per Ball Kgs |
No per metric Tonne
(1000Kgs) |
Surface Area
in Square mm |
19mm |
(.75) |
0.0284 |
35,211 |
1,134 |
25mm |
(1) |
0.0673 |
14,858 |
1,964 |
30mm |
(1.25) |
0.1314 |
7,610 |
2,828 |
40mm |
(1.5) |
0.2271 |
4,403 |
5,028 |
50mm |
(2) |
0.5384 |
1,857 |
7,857 |
60mm |
(2.25) |
0.9012 |
1,109 |
11,314 |
65mm |
(2.5) |
1.0514 |
951 |
13,278 |
70mm |
(2.75) |
1.3993 |
714 |
15,399 |
75mm |
(3) |
1.8171 |
550 |
17,678 |
80mm |
(3.25) |
2.0534 |
486 |
20,113 |
90mm |
(3.5) |
2.8853 |
346 |
25,456 |
100mm |
(4) |
4.3068 |
232 |
31,428 |
115mm |
(4.5) |
6.1325 |
163 |
41,563 |
120mm |
(4.75) |
7.2121 |
138 |
45,256 |
125mm |
(5) |
8.4096 |
118 |
49,106 |
133mm |
(5.25) |
9.7386 |
102 |
55,592 |
140mm |
(5.5) |
11.1946 |
89 |
61,598 |
150mm |
(6) |
14.5331 |
68 |
70,713 |
|
