LACK OF FUSION
“Lack of complete melting/ fusion of some portion of the weld metal in a joint”
- May be at the root, sides or between two runs.
- Reduces the strength of welds & makes welded structures unreliable.
- Low welding current
- Excess welding speed
- Unfavourable heat input
- Maintain proper current & welding speed
- Proper cleaning of each bead.