Steel making refers to the process of removing impurities in the form of phosphorus, silicon, carbon, nitrogen, etc. from raw steel and adding alloy elements like chromium, manganese, nickel, etc. to produce different grades of steel. The three main processes included in this field are basic oxygen steelmaking, ladle (metallurgy), and HIsarna steelmaking process. Most of the topics introduced in this book cover new methods and the applications of steel making. This textbook is an essential guide for both academicians and those who wish to pursue this discipline further.