What defines a consumable electrode in welding?

A consumable electrode in welding is specifically designed to not only conduct electricity to create the arc but also to melt and become part of the weld pool during the welding process. This melting contributes to the fusion of the base materials being welded together, enhancing the overall quality and strength of the weld. In the case of Gas Metal Arc Welding (GMAW), the filler metal is supplied in the form of a continuously fed wire, which melts away and adds material to the joint.

The definition aligns perfectly with the characteristics and functioning of a consumable electrode, allowing for effective bonding and strength in the weld. The melting of the electrode material is crucial, as it provides the necessary filler metal, thereby making it integral to the welding operation. This is particularly vital in applications where strength and durability are paramount, as the quality of the weld is directly influenced by the properties of the consumable electrode itself.