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Welding Cast Iron To Steel. Gray iron and ductile iron will act differently. A lot of experienced welders will opt for steel and durable nickel wire for a MIG cast iron weld.
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Youll have some problems welding to cast iron. Before welding it needs proper preheating. Its 10 times as hard as steel.
Welding cast iron has two schools of thought one is hot and the other is cold welding.
The disadvantage of MMA is the greater weld pool penetration and parent metal dilution but using electrode negative polarity. This graphite gives gray cast iron its characteristic appearance when fractured. Cast iron is typically higher in carbon than steel. Its a nickel base rod and after welding I wrap the part in Fiberfrax or Kaowool ceramic fiber cloth which allows it to cool slowly.
