Special cast iron
Cast iron is a metal alloy composed mostly of iron (typically more than 95%), with a carbon content between 0.8 and 6.7% by weight and additional alloying elements such as manganese, silicon, and sulphur. It has a relatively low melting point and is versatile, providing engineers with the ability to shape it into large complex engineering components.
Special cast iron is a modified form of cast iron that has been designed and formulated for specific applications. It is created by careful selection of metals, alloy additions and detail casting procedures, including applied heat treatments and controlled cooling processes. Special cast iron has improved qualities of strength, toughness, and resistance to environmental conditions.
In comparison to other traditional cast materials, special cast iron often offers improved performance across a range of demanding conditions, particularly in terms of corrosion resistance and strength. Special cast iron corrosion resistance is achieved in both acidic and alkaline conditions. It is also highly resistant to erosion and abrasion, and can be used in extremely wet or dry environments.
The material also offers greater strength and toughness than other ferrous components and is capable of providing greater reliability and much longer operational life when exposed to highly aggressive environments or operational pressures.
Furthermore, special cast iron is simple to repair and can be welded or brazed for fast repair and refurbishment.
Despite the many benefits associated with special cast iron, the best solutions often depend on the application. Although special cast iron may offer some advantages over other materials such as cast steel or stainless steel, there are a number of factors to consider before choosing the most suitable solution.
The strength, uniformity and cost of the component; the process used to manufacture it; and its end-use application are all important considerations. It is for this reason that special cast iron is widely used in the manufacture of automobile components, agricultural machinery, pumps, and valves.
Finally, special cast iron is often chosen due to its wide availability, ability to cast complex forms and custom designs, and its cost effectiveness in comparison to other materials. Special cast iron looks to remain a pivotal component in many existing and emerging technologies and is likely to see an increase in use in the future.
