Welding Cast Iron Nickel. Care must be taken not to oxidise the cast iron during acetylene welding as this causes silicon loss and the formation of white iron in the weld. If the welding rod has a high amount of nickel copper and other material that means this is the one you need to weld cast iron.
The chemical composition of the filler metal is. However these are the most expensive consumables and arent suited for welding thick sections. Getting the welding rod of steel core means you got the cheaper one.
Care must be taken not to oxidise the cast iron during acetylene welding as this causes silicon loss and the formation of white iron in the weld.
When using a steel electrode the contraction of the steel weld metal the carbon picked up from the cast iron by the weld metal and the hardness of the weld metal caused by rapid cooling must be considered. Ferro-Nickel Rods are cheaper than pure Nickel and are ideal for welding Cast Iron to Steel. 985 Ni071 C042 Si037 Mn. Cast iron can be welded with a coated steel electrode but this method should be used as an emergency measure only.