Page 217 - Welding of Aluminium and its Alloys
P. 217

Description  Causes  Current too low, travel speed too high,  Failure of weld metal to fuse to  incorrect torch angle, oxide film on prep.  weld preparation surfaces, inadequate joint cleaning, weld  preparation too narrow Current too low, travel speed too high,  Failure of weld metal to fuse to  incorrect t



           Weld defects, description and causes  Defect Name  Lack of side wall fusion  Lack of inter-run fusion  Lack of root fusion  Poor restart (cold start)  Lack of penetration  Insufficient (lack of) root  penetration  Excess penetration  Root or face undercut  Excess convexity

















           Table 11.1  ISO 6520  Defect no.  4011  (Fig. 11.1)  4012  (Fig. 11.1)  4013  (Fig. 11.1)  517  402  4021  (Fig. 11.2)  504  (Fig. 11.3)  501  (Fig. 11.4)  502 (butt)
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