Linear slag inclusions

Physicochemical Mechanism of Action

Linear slag inclusions form through non-metallic substances like dirt, paint or contamination that get into the weld during welding. They stay trapped in the metal and form lines.

Metallurgical Relevance & Welding Risks

These inclusions weaken the cross-section locally and contaminate the material. They can lead to cracks or fractures in the part and hurt the strength.

Workshop Practice & Instructions

Use clean tools and materials. Pay attention to a clean weld pool without contamination. Clean the part thoroughly before welding. If slag inclusions are suspected, check and remove them before continuing.