Is filler metal present inside the electrode?

Yes, filler metal can be present inside certain types of electrodes, particularly in welding processes like shielded metal arc welding (SMAW) and submerged arc welding (SAW). In these processes, the electrode itself serves as the filler material that is melted and deposited into the joint being welded. However, in some other welding techniques, such as gas tungsten arc welding (GTAW), separate filler rods may be used instead of incorporating filler metal within the electrode itself.