1.2 Grouping of Welding Processes
There are many ways in which welding processes may be grouped and different countries have
adopted various classification schemes based on the application of heat, whether external pressure is
applied, the type of energy involved (mechanical, electrothermic, thermochemical), etc. The American
Welding Society (AWS) groups welding processes based primarily on the mode of energy transfer, and
secondarily on the influence of capillary action in effecting distribution of filler metal in the joint (as in
brazing and soldering).