Welding is the formal process of joining two materials by fusion, or very high heat, which makes the bonded item even stronger than it was before the welding.

The prepared metal from the fabrication process is then welded together using a range of techniques and procedures. Welding processes often include Arc, which is a welding technique that uses a power supply in order to create an electric arc between the electrode on the welding rod and the material itself. The current created excels a huge amount of heat which is enough to melt the base material.

Welding machine or welder is an equipment which is used for the welding. The intense heat needed to melt metals produced by an electric arc, generated from power source once connected with the power. The arc is formed between the electrode and metal surface which may be done manually or guided toward the weld zone to make the joint or welding.

The different kind of energy sources may be used for welding materials as gas flame, electron beam, ultrasonic, electric arc. The molten metal or plastic called as filler material used to hold the pieces that are worked on to join.