Chapter 1 from the Welding Handbook, Ninth Edition, Volume 3, “Welding Processes, Part 2,” has been selected by the AWS Product Development Committee as a service to industry professionals. This chapter covers the fundamental principles of these processes and their variations, equipment, and mechanical systems. The advantages and limitations of the processes are discussed, and welding conditions as applied to various metals are presented. Other topics include joint design, welding schedules, surface preparation, weld quality, and economics. The chapter concludes with a section on safe practices specific to the spot and seam welding processes.
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