The difference between defects and discontinuities

A Welding Discontinuity

Technically, a welding discontinuity is the lack of a mechanical, physical or metallurgical harmony in the weld. This could be manifested in terms of

  • Varied porosity
  • Incomplete fusion or joint penetration
  • Unacceptable profiles
  • Subtle tears and cracks

Welding Defects

All welding defects are developed discontinuities. If a discontinuity renders a weld incompetent or lowers its quality, it would be classified as a defect. Defects make the product risky to use or substandard. It is up to the quality control to decide whether the discontinuity qualifies as a defect or not.