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Excelloy 21 AC/DC + :

For cast iron, Ultra machinable alloy for repair welding cast iron

The Excelloy 21 is an exceptional out of position nickel electrode that produces porosity free machinable welds on all grades of cast iron. Its pulsed arc allows you to produce low heat input welds while maintaining maximum control.


Applications

For low temperature repairs on all types of cast iron where extremely soft, machinable weld deposits are required. Ideal for intricate or thin-wall gray iron castings. Excellent for repairs on cast iron gears, machine tools, heads, engine blocks, and pump housings. This is also an exceptional electrode for joining dissimilar metals such as Monel, copper, stainless, nickel, and steel.


Procedure

Clean and prepare weld zone in accordance with standard welding practice. Vee out cracks using Excelloy 56. Use skip welding technique on complicated castings. Limit bead length to 1-1/2” to minimize heat input. Maintain a maximum interpass temperature of 200 F. Chip slag between passes and peen weld with ball end of ball peen hammer.



 

Technical Data

Tensile Strength.............................Up to 50,000 PSI
Elongation......................................Up to 30%
Hardness.......................................160 Brinell


Recommended Amperage Settings

3/32”
30-80 Amps

1/8”
70-110 Amps

5/32”
80-130 Amps

3/16”
100-170 Amps

*Also Available in tig form (Excelloy 21T)