This book has been prepared by H.L. Saunders, Consultant, Alcan (Retired), with information and assistance from the Aluminum Association and from member companies represented on the Technical Advisory Panel on Welding and Joining.Mr. Saunders (BASc, Mechanical Engineering, University of British Columbia) has 36 years of experience in the aluminum welding industry. He has been active in AWS, CSA, WIC and undertaken special studies for the National Research Council and the Welding Research Council. He was a former member and Chairman of the Aluminum Association's Technical Committee on Welding and Joining.