DESCRIPTION
This is a ferronickel cast iron electrode i.e CiFeNi The weld deposit of this electrode gives 50 to 55% Nickel and balance Iron (Fe). This produces machinable welds in cast iron without any preheat. This can be used for dissimilar joints such as cast iron to carbon, steel and nickel based alloys.
MECHANICAL PROPERTIES
Tensile Strength 55000 psi.
Elongation: 10%
APPLICATION
This electrode has been specially designed for the rectification and repair of all commercial grade of cast iron where machining after welding is to be carried out. Preheating and post weld heat treatment is not required in many applications where the location of the defect or shape of design is such that high stresses are not developed.
TECHNIQUE
When welding without preheat it is essential to restrict the heat input by using the smallest possible diameter electrode and lowest possible current to limit the width of the heat effected zone. No continuous welding to be done but a scattered or planned wandering system has to be followed. When welding thick sections preheat to 300″ C (approx) and allow to cool slowly after welding.
RECOMMENDED AMPERAGE
4.00mm X 350mm – go to 135 Amps. Polarity
DC + AC 70 OCV min.
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