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Welding Consumables 0:25

Why does a weld look good but still fail?

Even the best inspector in the world doesn't have X-ray vision. A weld may look perfect on the surface, but underneath it could have defects such as lack of penetration, lack of fusion, porosity, or insufficient heat input. And those are just a few of the possible issues.Part of Ask the Experts: short, practical answers from the Weldability SIF team. No marketing, no sales pitch. Just the people who are on the tools and on site every week.

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Hi. Why does a weld sometimes look good but still fail? Even the best inspector in the world doesn't have X-ray vision.

A weld may look perfect on the surface, but underneath it could have defects such as lack of penetration, lack of fusion, porosity, or insufficient heat input. And those are just a few of the possible issues.

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