POP Nickel Electrodes - NI 55 5/32, 1 Pound Tube - Small Packaging

Weldcote Metals NI-55 electrodes are used for welding of cast irons to themselves as well as for joining cast irons to mild steels.NI-55 is also employed for the repair of castings. The welds are moderately hard and require carbide tipped tools for machining.A preheat and interpass temperature of not less than 350 degrees Fahrenheit is required during welding. Nickel 55 has a lower nickel content than Nickel 99 electrodes nominally 55%.Weld deposits are usually machinable, but under conditions of high admixture, the welds can become hard and difficult to machine. Nickel 55 welds are stronger, more ductile and more tolerant of phosphorus in the casting. It also has a lower coefficient of expansion than Nickel 99 resulting in fewer fusion line cracks.Nickel 55 is usually used to repair castings with heavy or thick sections such as motor blocks, housings, machine parts, frames, defective castings and building up worn sections. Procedure: AC or DC, all position. A preheat and interpass temperature of no less than 350 degrees Fahrenheit is required during welding. Lightly peen between passes and use a skip or back-step welding technique. Allow casting to cool slowly.