A term sometimes used in referring to E6020 and E6030 electrodes. They are called “hot rods” because when depositing weld metal in flat or horizontal positions with these electrodes, high current may be used while holding a very short arc. As a result, a high rate of deposition is obtained. There is also a significant increase in penetration beyond the root of the weld, which measurably increases the strength of the weld.
Because of the deeper penetration obtained, much of the weld metal is derived from the base metal of the part being joined, therefore the process is economical because less electrode is consumed. See DEEP WELDING.