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Lap Weld

Last updated: February 15, 2019

What Does Lap Weld Mean?

A lap weld is the result of the weld made on a lap joint. A lap weld consists of two or more materials that are overlapped on top of one another. The edge of one material is melted and fused with the surface of another material. A lap weld is categorized in the fillet weld family.

Lap welds are commonly used in welding processes that involve automation. The lap joint, which is used when making a lap weld, is very forgiving to varying part dimensions. That is because satisfactory lap weld fit-up is easily achieved and the member whose flat surface is being welded to the edge of the other material acts as a backing material that reduces the risk of blowing through the weld joint.

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Corrosionpedia Explains Lap Weld

A variety of processes are used to make a lap weld. Gas tungsten arc welding, gas metal arc welding, and shielded metal arc welding are a few popular methods. Because a lap weld is a fillet weld, high energy density processes such as laser beam welding and electron beam welding are not usually used to make a lap weld.

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