Which welding process uses a non-consumable electrode?

Which welding process uses a non-consumable electrode?

• A. Gas Tungsten Arc Welding
• B. Shielded Metal Arc Welding
• C. Gas Metal Arc Welding
• D. Submerged Arc Welding

Answer: (A)

Non-consumable electrode means the electrode does not melt into the weld; the arc is formed with a solid electrode that remains intact while filler metal, if needed, is added separately. Gas Tungsten Arc Welding uses a non-consumable tungsten electrode to sustain the arc. The tungsten electrode stays clean and unmelted, and any filler metal is supplied with a separate filler rod as needed. This is why this process is distinguished from others that deposit weld metal by melting the electrode itself. For example, Shielded Metal Arc Welding uses a coated consumable stick that melts to form the weld, Gas Metal Arc Welding uses a continuously fed consumable wire, and Submerged Arc Welding also relies on a consumable electrode that melts into the weld along with flux. Gas Tungsten Arc Welding is favored for precise, clean welds and for working with a variety of metals, though it can be slower and requires more skill.

Non-consumable electrode means the electrode does not melt into the weld; the arc is formed with a solid electrode that remains intact while filler metal, if needed, is added separately. Gas Tungsten Arc Welding uses a non-consumable tungsten electrode to sustain the arc. The tungsten electrode stays clean and unmelted, and any filler metal is supplied with a separate filler rod as needed. This is why this process is distinguished from others that deposit weld metal by melting the electrode itself. For example, Shielded Metal Arc Welding uses a coated consumable stick that melts to form the weld, Gas Metal Arc Welding uses a continuously fed consumable wire, and Submerged Arc Welding also relies on a consumable electrode that melts into the weld along with flux. Gas Tungsten Arc Welding is favored for precise, clean welds and for working with a variety of metals, though it can be slower and requires more skill.