Steel and iron are among the most important materials for construction and production. The DIN pocketbook offers a variety of standards for different applications of steel and iron. The documents contain dimensions, limit dimensions, and shape tolerances, serving as a knowledge source for companies in the steel and iron sector. The DIN pocketbook 28 includes over 800 pages with 64 documents, including 4 corrections. In DIN pocketbook 28, you will find documents on topics such as: reinforcing steel, bar steel, crane tracks, beams, profile steel, wedge steel, mining development, corrugated and flat sheets, wire, semi-finished products, strip steel, flat, square, and round bars, as well as cold and hollow profiles. The appendix contains a directory of standards sorted by standard numbers for all standards printed in DIN pocketbooks 28 and 401 to 405 in the field of steel and iron. The book is aimed at manufacturers of steel and iron products, foundries, materials scientists, steel construction companies, and experts.