What material is produced by removing almost all the impurities and carbon from pig iron?

The material produced by removing almost all the impurities and carbon from pig iron is wrought iron. Wrought iron is known for its fibrous structure, which results from the manufacturing process that includes a significant reduction of carbon content and removal of impurities. This gives wrought iron its characteristic ductility, malleability, and corrosion resistance, making it suitable for various applications, especially for decorative elements and structural components.

In contrast, stainless steel involves alloying iron with chromium, enhancing its resistance to corrosion, but it is not directly derived from pig iron through the same purification process. Carbon steel retains a specific amount of carbon, which is typically higher than what is found in wrought iron, and cast iron, on the other hand, contains a higher concentration of carbon and is produced by melting pig iron with additional elements. This clearly distinguishes wrought iron as the material that results from the extensive refining and removal of carbon and impurities from pig iron.