How To Weld Old Cast Iron. Also dont let the iron get hotter than 1400 F bright red. Experts suggest using a 55 nickel rod.
Follow along as I repair a broken cast ir. The 99 percent rod leaves a softer material in the weld and is suitable for machining if you need a flat surface when youre done. The casting must be completely clean in the area of the weld.
NI 99 uniquely design for iron cost has more Carbon and gives graphite properties which is called grey cast iron.
Preheating the cast iron part before welding will slow the cooling rate of the weld and the region surround the weld. NI 99 uniquely design for iron cost has more Carbon and gives graphite properties which is called grey cast iron. Cast iron can be tricky to repair because its prone to cracking. It is always preferred to heat the entire casting if possible.