|
| Raw Material |
|
|
|
| Normal composition of casting as per A-159 (G-1800 to G-4000) grade. |
| |
|
 |
|
| Constituents |
Composition (Min – Max) |
| Carbon |
3 to 3.5 % |
| Silicon |
1.8 to 2.4 % |
| Manganese |
0.60 to 1 % |
| Sulphur |
0.15 Max |
| Phosphorous |
0.10 to 0.20 % |
| Chromium |
As required |
| Moly |
As required |
| Copper |
As required |
| Nickel |
As required |
| Vanadium |
As required |
|
 |
|
| |
| Process - Centrifugal Casting and Shell Moulding |
|
| Hardness - Min 200 BHN – Max 260 BHN or Min 95 HRB – Max 103 HRB |
|
| Tensile Strength - kgf / mm2 – min 25 |
|
|
| Micro Structure |
|
|
|
- Matrix – Pearlitic
- Graphite – A Type
- Free Ferrite – Max. 5%
- Free Carbide – Max. 5%
|
|
| Dimensions |
|
|
|
- Inner diameter: 40 mm to 325 mm
- Outer diameter: 45 mm to 350 mm
- Length: Up to 700 mm
|
|
| Geometrical Parameters |
|
|
|
- Ovality - Within 1 thou
- Perpendicularity - Within 1 thou
- Taper - Within 1 thou
|
| |
| Finishing |
|
|
|
- Phosphating / Blackening
- Chrome Plating (Inner and Outer diameter)
|
|
