Welding Cast Iron With 7018 Rod. Its low-hydrogen iron coating makes it more crack resistant and protects the welding beam from oxygen and moisture. I decided to try and weld a broken cast iron vise with 7018 electrodes just to see if it could be done.
But using 7018 to weld cast iron makes peening preheating and cooling tricky to manage. The 7018 welding electrode performs well in freezing temperatures. THZ308 is pure nickel welding core strong reduction of graphite type coating iron rod.
Its also suitable for low medium and high-carbon steels.
It is a mild steel rod that is coated with a low-hydrogen iron-based flux compound that vaporizes to shield the molten weld bead from contamination by air and moisture. Welding isnt an easy task to do. Also referred to as a low-hydrogen rod this electrode has a flux coating with a very low hydrogen content allowing a minimal amount of hydrogen into the weld puddleThe molten weld beads are protected from contamination moisture and hydrogen in the atmosphere by the iron-containing. The 7018 arc welding rod is commonly used for general-purpose welding of carbon steel.