Welding Electrode Selection

Match the mechanical properties of the base metal.

Match the chemical composition of the base metal as closely as possible.

Match electrode to available power supply — AC or DCEN (electrode negative) or DCEP (electrode positive)

Match the electrode to the position of the weld.

Observe joint design — Use deep penetrating electrodes for tight fit-up and UN beveled joints. Use light penetration electrodes for poor fit-up and thin material.

Observe service conditions and select electrode accordingly — high temperature,

Low temperature, corrosive atmosphere, impact loading these conditions is best

Met by using low hydrogen electrodes

Consider welding costs — highest deposition rate is in the flat position. Use high iron power electrodes to further increase deposition. By far, the largest factor is labor and overhead.