| Forged Steel Grinding Media Balls as Per is 12658 : 1989 |
| (A) CHEMICAL COMPOSITION : The Chemical Composition of the Forged Steel Grinding Media Will Be As Per |
  
| |
EN -44 |
EN -31 |
| Carbon |
0.90 -1.20% |
0.95 -1010% |
| Manganese |
0.45 -0.70% |
0.25 -0.45% |
| Silicon |
0.30 % Max |
0.10 -0.35% |
| Sulphur |
0.06 % Max |
0.035 %Max |
|
Phosphorous |
0.60 Max. |
0.35 % Max. |
| Chromium |
|
1.40 -1.60 % |
(Iv) STANDARD SIZE OF GRINDING MEDIA : Balls Diameter (mm)- 100,90,80,75,70,65,60,50,40,30,25,&20
Cylpebs (mm)- 25x25, 22x22, 19x19
(V) TOLERANCE ON SIZE : VARIATION On Size : Shall Not Exceed the Following Limits :-
|
SHAPE AND SIZE |
TOLERANCE (MM) |
| (1) Balls For Size 50 mm &
Above |
+/- 3.00 |
| (2) Balls For Size 50 mm & Below |
+/- 2.50 |
| (3) Cylpebs for all sizes |
+/- 1.50 |
 
|
