This document provides an overview of steel products and production from Krakatau Steel. It defines steel as an alloy of iron with carbon content between 0.008-2%, along with other alloying elements like manganese, silicon, and aluminum. It discusses the raw materials used in steelmaking like pig iron, direct reduced iron, and steel scrap. It also covers the properties and characteristics of steel like strength, toughness, hardness, weldability, heat treatability, and corrosion resistance. The document is intended to provide product knowledge for trainees on steel definitions, classifications, identifications, manufacturing processes, specifications and applications.