This book provides a comprehensive overview of PT Krakatau Steel (Persero) Tbk, detailing its flat product manufacturing capabilities and specifications. It outlines the company’s production of steel slabs, hot rolled, and cold rolled products, including dimensions, tolerances, and standard specifications for various applications such as oil and gas piping, automotive components, and pressure vessels. Additionally, it covers the manufacturing of steel billets and wire rods, specifying grades and intended uses. The document includes information on packaging standards, certifications, patents, and ordering procedures, as well as a map of the Krakatau Industrial Estate Cilegon (KIEC). This specification serves as a vital resource for customers and stakeholders in the steel industry, highlighting Krakatau Steel's commitment to quality and innovation in steel production.