What is one function of a welding rod?

A welding rod serves a crucial function as filler material during the welding process. When welding, the base metals are typically melted and fused together, but to create a strong joint, additional material is often required. This is where the welding rod comes into play.

The rod is melted alongside the base metals, and the molten material flows into the joint to fill any gaps, creating a secure bond as it cools and solidifies. This is particularly important in processes like arc welding, where the filler material provided by the rod not only helps to join the materials together but also contributes to the overall strength and integrity of the weld.

While preventing rust, aligning components, and cooling metal are significant considerations in the overall welding process, they are not primary functions of a welding rod. The welding rod's main purpose is indeed to supply the necessary filler material to ensure a strong weld.