NickelRod 55 Electrode
REFERENCESCast Iron Welding Guide
Aufhauser NickelRod 55 is used for welding cast irons to themselves as well as for joining cast irons to mild steels. It 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°F (175°C) is required during welding.
GENERAL INFORMATIONChemical Composition
Note: All values are maximum percentage, unless shown in range.
PHYSICAL and MECHANICAL PROPERTIES
|Tensile Strength||84,000 psi (580 MPa)|
|Yield||59,500 psi (390 MPa)|
|Elongation, min. %||8%|
Recommended Welding Parameters
(For vertical welding amperages are to be reduced by 10-15 amps.)
SPECIFICATIONS MEET or EXCEED
|AWS A5.15m Class ENiFe-CI|
STANDARD SIZES AND DIAMETERS
|Diameters||3/32", 1/8", 5/32", 3/16"|
NICKELROD 55 & 99 COMPARISON
|General Description||High nickel, extruded electrode for production and repair of cast iron. Fabrication and repair. Pump housings, valves, castings, cast and malleable fittings.||Lower nickel content electrode for production, salvage and repair of all cast irons. Fabrication and repair. Pump housings, valves, cast and malleable fittings.|
|Weld Deposit||Good machinability. Very hard weld deposit, predominantly nickel.||More easily machineable. High strength.|
|Build-up, Fill Holes, Repair cracks||In all types of cast iron||Gray or alloyed cast irons|
|Out-of-Position Characteristics||very good||good|
|Parts Dismantling||often not required||often required|
|Color Match||Close color match to cast irons||Close color match to cast irons|
|Tensile Strength||up to 50,000 psi||up to 70,000 psi|
|Pre-Heating||Not necessary, although for large parts, suggest pre-heating to 350°F min.||Min. pre-heat of 350°F required|
|Weld Fusion Zone||Broader. Larger HAZ.||More narrow. Reduces hard areas of HAZ to a minimum.|
|Cost||Higher, due to high nickel content||More economical, due to lower nickel content|
- Use AC or DC reverse polarity.
- Vee out cracks with Aufhauser Groovees cutting/gouging electrode or by grinding.
- Pre-heat heavy castings to 350°F min. for best results with NickelRod 55. (Only necessary for large parts with NickelRod 99.)
- Direct the arc on deposited metal with the electrode at a slight angle in the direction of travel.
- With NickelRod 99, use a short arc; use stringer beads; skip or back-step weld and peen to relieve stresses; cool casting slowly.
- With NickelRod 55, peen lightly between passes and use a skip or back-step welding technique.
- Cool casting slowly with either rod.