Hydrogen Gas Embrittlement: Mechanisms, Mechanics, and Design explains the complex hydrogen-material interactions andenables improvement ofmaterial selection and strength design for hydrogen components. The book reviews the fundamental mechanisms of hydrogen embrittlement, the various behaviors of hydrogen in metallic materials, such as diffusion, solution, and trapping, and emphasizes the necessary properties for effective strength design of various materials under the influence of hydrogen, including tensile properties, fatigue (life, limit, crack growth), and fracture toughness. It provides experimental data of hydrogen gas at various pressures and temperatures with fractographic observation, including practical interpretation of hydrogen compatibility of materials based on tensile, fatigue, and fracture mechanics testing. Material testing machines and methods, the effects of hydrogen on various BCC steels, austenitic steels, and nonferrous metals, and practical applications and methods of strength design for hydrogen vessels and components are each covered, as well. Key Features, Explains hydrogen-material interactions, thus improving material selection and strength design, Provides insights into hydrogen-induced degradation of material strength at the atomic-, macro-, and micro-levels, Analyzes several degradative behaviors of materials, including BCC steels, austenitic steels, and nonferrous metals, Includes verification tests, case studies, applications, and experimental data