What was plane iron steel in 19th century?

In the 19th century, plough iron, also known as wrought iron or plain iron, referred to a type of iron that was malleable and had been processed to remove impurities, making it suitable for various applications, especially in agriculture and construction. It was often used to manufacture tools, machinery, and structural components due to its ductility and strength. The advent of the Bessemer process in the mid-19th century eventually led to the development of steel, which offered even greater strength and versatility compared to plain iron.