Welding Cast Iron With Nickel Rod. To Heat or not to Heat. Since the core wire is approximately 99 nickel weld deposits are basically soft and can be shaped.
You will prolly do OK with the 99the secret to welding any cast iron is to force it to cool slowly by wrapping in fire blanket Kaowool bury it in kitty litter or oil dry compound. This welding rod can make the iron soft and machinable and can minimize cracking. What kind of welding rod do you use on cast iron.
There are two common types of Cast iron Welding Rod Ferro-Nickel and Pure Nickel.
55 nickel 45 iron mix. This rod will show better results and ensure fewer weld cracks than the 99 nickel rod. By using coated rods these cracks dont appear. This is a more affordable price and looks the same as cast iron when welded.