This book is designed to help metallurgical, chemical, mechanical and reliability engineers responsible for the safe operation and maintenance of equipment made of steel. Such equipment could be susceptible to low and high-temperature hydrogen attack due to a condition resulting from the steelmaking practice, a fabrication process, and/or in-service use. It provides a fundamental approach balanced with a realistic view of costs, service failures, and practical solutions to problems of hydrogen attack in steel. Contents: Hydrogen Attack Costs, Classification and Service-Failure Examples Fundamental Aspects Of the Problems Fundamental Aspects of Solutions to the Problems Practical Solutions to Hydrogen Attack Problems Summary and Future Direction in Terms of Computer-Software Development.