Describe the filler wire used in SAW.

Describe the filler wire used in SAW.

• A. A solid metal electrode that may be non-coated or provided with a thin layer of copper on mild steel, and alloyed steel wires to prevent rusting.
• B. A flux-coated electrode.
• C. A hollow tubular wire.
• D. A solid copper wire.

Answer: (A)

In submerged arc welding, the filler material is a continuously fed solid wire electrode, with shielding provided by a granular flux applied from above rather than by coating the electrode. The wire itself is a solid metal conductor and can be bare or have a thin copper coating. The copper layer helps with electrical contact, reduces oxidation during feeding, and alloying can be used to improve rust resistance. Hollow tubes are used for flux-cored welding, and a flux-coated electrode is typical of other processes like SMAW, so they’re not describing SAW. Therefore, the filler wire is best described as a solid metal electrode that may be non-coated or copper-coated, with possible alloying to prevent rust.

In submerged arc welding, the filler material is a continuously fed solid wire electrode, with shielding provided by a granular flux applied from above rather than by coating the electrode. The wire itself is a solid metal conductor and can be bare or have a thin copper coating. The copper layer helps with electrical contact, reduces oxidation during feeding, and alloying can be used to improve rust resistance. Hollow tubes are used for flux-cored welding, and a flux-coated electrode is typical of other processes like SMAW, so they’re not describing SAW. Therefore, the filler wire is best described as a solid metal electrode that may be non-coated or copper-coated, with possible alloying to prevent rust.