Since the release of the first edition of this guide, developments in the field of materials engineering have progressed steadily. This technical book provides universally applicable and practically relevant information for the safe welding processing of the most commonly used steel materials and nickel alloys. The currently valid regulations have been consistently taken into account and included in the guide. Factually sound and useful publications for practitioners have been collected, evaluated, and presented in a clear format. At the end of the guide, there is a glossary that compiles important technical terms, particularly related to the issues of welding metallurgy.