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 | 0.20 to 0.40 % |
| Chromium | As required |
| Moly | As required |
| Copper | As required |
| Nickel | 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 - Pearlite
- Graphite – A & B Type
- Free Ferrite – Max. 5%
- Free Carbide – Max. 5%
Dimensions
| Constituents |
|
||||
| Dry & Wet Type | Wet Type | Dry Type | |||
| Inner Diameter | 40 - 250 mm | 40 - 250 mm | 40 - 325 mm | ||
| Outer Diameter | 45 - 350 mm | 45 - 350 mm | 45 - 350 mm | ||
| Length | Up to 375 mm | Up to 550 mm | Up to 700 mm | ||
Geometrical Parameters
 |
Ovality / Roundness (Circularity) - Within 1 thou |
 |
Perpendicularity - Within 1 thou |
 |
Taper - Within 1 thou |
 |
Angularity - Within 1 thou |
 |
Cylindricity - Within 1 thou |
 |
Concentricity - Within 1 thou |
Micro Structure
- Phosphating / Blackening
- Chrome Plating (Inner and Outer diameter)