Modern civilization as we know it would not be possible without iron and steel. Steel is essential in the machinery necessary for the manufacture of all our needs. Even the words themselves have come to suggest strength. Phrases such as “iron willed,” “iron fisted,” “iron clad,” “iron curtain,” and “pumping iron” imply strength. A “steely glance” is a stern look. “A heart of steel” refers to a very hard demeanor. The Russian dictator, Stalin (which means steel in Russian), chose the name to invoke fear in those under him. This book is intended both as a resource for engineers and as an introduction to the layman about our most important metal system. After an introduction that deals with the history and refining of iron and steel, the rest of the book examines their physical properties and metallurgy.