Figure 3-3 Weld dimensions
Undercut (fig. 3-4): Measure any undercut using appropriate measuring devices and
check it against the acceptance criteria. The use of modelling clay is particularly convenient
for checking undercut.
It is impossible to completely eliminate undercutting during welding particularly in
the case of fillet welds. Local undercut and continuous undercut of 10% and 5% of
the parent metal thickness respectively is acceptable provided that it does not form
a sharp notch.
Appendix K Page 13