In plasma arc welding, a plasma arc established between the electrode and the work-piece.
Welding Tech
The distance between the outer most portion of the torch and the work surface.
The dimension from the outer face of the torch nozzle to the work piece.
A crack originating at the junction between the face of the weld and the base metal It may be any one of three types: (1) radial or stress crack; (2) under-bead crack extending through the hardened zone below the fusion line; or (3) the result of poor fusion between the deposited filler metal and the base metal.
The point on the weld bead that meets the parent metal. Every weld bead has two ?toes?.