In welding, using the correct welding consumables, or filler materials ensures a strong bond between two metals. It is one of the four components to a weld along with the metal being welded, the heat source, and the shield from the air. As the metal gets heated to its melting point while being shielded from the air, the consumable is added to the area being joined to produce a single piece of metal. The role of the consumable in arc welding is not only to fill in the seam but also stabilize the flame of the electrical arc.
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