Who Invented Steel?

Steel made using the Bessemer process is easy and cheap to mass produce. The amount of carbon added to iron changes it from wrought iron, to steel, to cast iron, each being a progressively harder metal. The Bessemer process uses a converter to force a blast of air into molten-pig iron; and, this increases the carbon content. Robert Mushet later refined the technique, by adding spiegel a compound of iron, carbon, and manganese, to help streamline the process.