M. Farajian-Sohi, University of Trollhättan, Trollhättan, Sweden; N. Järvstråt, University West, Trollhattan, Sweden; M. Thuvander, Esab AB, Gothenburg, Sweden

Summary: The influence of welding parameters on weld quality concerning formation of toe imperfections termed “Cold Laps” in Tandem gas metal arc welding is investigated. Theses semi elliptical cracks are between 0.1 to 1.5mm in depth and 0.1 to 4 mm in length. Wire feed speed, torch angle and electrode types were the influencing factors.