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Overlap - Welding defects


Figure 1: Overlap.

Defect name: Overlap
Record No.: 891
Type of defect (Internal/Surface): Surface
Defect classification: Welding defects
Steel name: Steel
Steel composition in weight %: No data.
Note:  
Definition: When the face of the weld extends beyond the weld toe.
Cause: Improper welding technique. Typically, electrode angles and travel speed.
Prevention: Overlap is a contour problem. Proper welding technique will prevent this problem.
Repair: Overlap must be removed to blend smoothly into the base metal. Be careful of deep grind marks that run transverse to the load. Also be careful of fusion discontinuities hidden by grinding. Use NDT to be sure.
Reference: Not shown in this demonstration version.