What is a common welding defect that can occur due to improper technique?

A common welding defect can arise from using improper techniques, and including all these defects highlights various potential issues welders might encounter.

Porosity refers to tiny gas pockets that can form within a weld bead due to trapped gases escaping from the molten weld pool. This often occurs when the welding area is contaminated or if the welder fails to maintain proper shielding from atmospheric conditions, such as wind.

Weld undercut is when there is a groove or depression at the edge of the weld. This defect can result from excessive heat input or improper travel speed. If the technique is not adjusted correctly, it can lead to weakened welds.

Excess slag, which is the residue left on the surface of welds, typically results from improper technique or inconsistent welding practices. If the welder does not clean the weld area properly or if the filler material is not suited to the base metals, it can create excessive slag that complicates cleanup and affects weld integrity.

Recognizing all these defects as common issues reinforces the importance of proper welding techniques in achieving high-quality welds.