What is Filler Metal in Welding?

Filler metal is the metal or alloy that is added to making a welded, brazed, or soldered joint. The filler metal is melted and drawn into the joint during the welding process. It serves to join two pieces of metal together and to fill any gaps that may be present.

Why do we use filler metal in welding?

The type of filler metal used will depend on the metals being joined, the welding process being used, and the desired properties of the finished joint.

The filler metal may also be chosen for its ability to match the appearance of the metals being joined. For example, when welding stainless steel to carbon steel, a stainless steel filler metal can be used to produce a weld that is less likely to rust.

What is the difference between weld metal and filler metal?

Weld metal is the metal that has been added during the welding process. It includes the filler metal and any base metals that may have melted during welding. Filler metal is the pure metal used to fill the joint. It does not include any base metals or other metals that may have melted during welding.