Which welding process uses a separate filler rod and welds non-ferrous metals?

Which welding process uses a separate filler rod and welds non-ferrous metals?

• A. TIG welding
• B. MIG welding
• C. Oxyacetylene welding
• D. Brazing

Answer: (A)

TIG welding is distinguished by using a non-consumable tungsten electrode with shielding gas, and filler metal is added separately with a handheld filler rod as needed. This setup gives excellent control and produces clean welds, especially on non-ferrous metals such as aluminum, copper, and titanium. MIG welding, by contrast, feeds a continuous filler wire through the welding gun, so there isn’t a separate rod added manually. Oxyacetylene welding uses flame to melt the metals and can involve filler rod, but it’s a flame-welding method rather than the precision, separate-rod approach of TIG for non-ferrous materials. Brazing joins metals with a filler metal that melts at a lower temperature than the workpieces, and the base metals don’t melt, so it isn’t a welding process. So the process that uses a separate filler rod and welds non-ferrous metals is TIG welding.

TIG welding is distinguished by using a non-consumable tungsten electrode with shielding gas, and filler metal is added separately with a handheld filler rod as needed. This setup gives excellent control and produces clean welds, especially on non-ferrous metals such as aluminum, copper, and titanium.

MIG welding, by contrast, feeds a continuous filler wire through the welding gun, so there isn’t a separate rod added manually. Oxyacetylene welding uses flame to melt the metals and can involve filler rod, but it’s a flame-welding method rather than the precision, separate-rod approach of TIG for non-ferrous materials. Brazing joins metals with a filler metal that melts at a lower temperature than the workpieces, and the base metals don’t melt, so it isn’t a welding process.

So the process that uses a separate filler rod and welds non-ferrous metals is TIG welding.