Glossary “weld undercut” Definition:
A groove melted along either side of the weld and left unfilled.

Glossary “weld porosity” Definition:
Holes in the weld.

Glossary “weld spatter” Definition:
Drops of electrode on and around the weld bead.

Glossary “weld throat” Definition:
Refers to the depth of the triangular cross section of the weld.

Glossary “weld through primer” Definition:
Corrosion resistanat primer applied, before welding, to mated surfaces which are undercoated, or where a zinc coating has been removed.

Glossary “weld overlap” Definition:
Excess weld metal mounted on top and to either side of a weld bead.

Glossary “weld penetration” Definition:
Indicated by the height of the exposed surface of the weld on the back side. It is needed to assure maximum weld strength.

Glossary “weld pool” Definition:
Localized volume of molten metal in a weld prior to its solidification as weld metal.

Glossary “weld metal” Definition:
Portion of a fusion weld that has been completely melted during welding.

Glossary “weld legs” Definition:
The width and height of the weld bead.

Glossary “weld axis” Definition:
Line through the length of the weld, perpendicular to and at the geometric center of its cross section.

Glossary “weld bead” Definition:
A weld resulting from a pass.

Glossary “weld crack” Definition:
A crack located in the weld metal or heat affected zone.

Glossary “weld distortion” Definition:
Uneven weld bead.