Grey Cast Iron is a pearlitic iron that offers a good combination of strength and wear resistance, while still possessing good machinability and an excellent surface finish. Due to the graphite structure in Grey Cast Iron noise and vibration damping along with thermal conductivity are excellent in this grade. Grey Cast Iron is not recommended for hardening or heat treatment applications.
| Element | Total Carbon | Silicon | Sulphur | Phosphorus | Manganese | Balance |
|---|---|---|---|---|---|---|
| Typical | 3.35% | 2.50% | 0.01% | 0.70% | 0.55% | Iron |
Grey Cast Iron can be used to make cam shafts, wharves, cone winding and a guide for spinning looms. Grey Cast Iron in general engineering can be used for plungers, inking rollers, gears, pulleys, cams, rolls and maintenance items.
Ductile Cast Iron has an increased pearlitic- ferritic structure against Grey cast Iron, resulting in higher wear resistance and increased strength with improved heat-treatment response when compared to FC 300 and is therefore recommended for applications in which good machinability and surface finish are required, as well as minimal friction with other parts and/or materials. Noise and vibration damping are good in this grade. Ductile cast Iron can be oil quenched and hardened to a minimum of 50 Rc on the outer skin of the bar, also has good response to most conventional methods of surface hardening.
| Element | Carbon | Silicon | Manganese | Sulphur | Phosphorus | Balance |
|---|---|---|---|---|---|---|
| Typical % | 3.40 - 3.85 | 2.30 - 3.10 | 0.10 - 0.30 | 0.02 Max | 0.10 Max | Residual |
Ductile Cast Iron can be used in machines for gear blanks, timer pulleys, bushes, spacers and many other parts of machines. Ductile Cast Iron can also be used for pistons, glands, pistons, glands, rotors, couplings, hydraulic press rams, control valves, manifold blocks and valve bodies.