How does the weight of cast iron compare to wrought iron?

Cast iron and wrought iron are two commonly used materials in metalworking, but they differ significantly in weight due to their composition and density. Cast iron is generally heavier than wrought iron because it contains a higher carbon content, typically between 2% to 4%, which increases its density. The density of cast iron ranges from 6,800 to 7,800 kg/m³, making it a robust and durable material often used for heavy-duty applications like engine blocks and cookware.

On the other hand, wrought iron has a lower carbon content, usually less than 0.08%, and includes fibrous slag inclusions, which reduce its overall density. The density of wrought iron is approximately 7,750 kg/m³, slightly lower than cast iron. This makes wrought iron lighter and more malleable, ideal for decorative ironwork, gates, and fencing.

In summary, cast iron is heavier than wrought iron due to its higher carbon content and density. While cast iron excels in strength and durability, wrought iron offers greater flexibility and a lighter weight, making each suitable for different applications. Understanding these differences helps in selecting the right material for specific projects.