This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Carbon rods are used in welding as electrodes, flux material and inert gas (Argon or Carbon dioxide to shield from oxygen) are also used in the process. Possibly some filler material is also used.

Some times electrodes are also used as filling materials. Carbon and steel alloy called carbon steel and cast iron - for welding these materials, carbon (non-metal) may be used.
Flux is a non metal used to protect the joint from direct exposure to atmosphere.