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Mil-Arc 24

For welding all weldable grades of cast iron including: grey, malleable, ductile, meehanite, nodular, and cast iron to steel.

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  • All position
  • Easy strike and restrike
  • Will not overheat, even on AC.
  • Low spatter and fuming
  • Soft stable arc
  • High nickel alloy
  • Nonconductive flux
  • Welds through contaminants
  • Ultra smooth bead


  • Versitile
  • Less stub / electrode loss
  • Consistant arc, no surging and spalling
  • Less cleanup / user friendly
  • Excellent weld pool visability
  • Ductile, crack-resistant, and very machinable
  • Excellent for tight tolerances
  • Offers porosity free deposit on poor casting
  • Cosmetically appealing


Mil-Arc 24 will not side-arc because of the special nonconductive flux. Now you can weld in tight tolerances without deforming the sides of a housing, machined or threaded surface, etc. This feature, along with not needing to preheat the majority of repair applications, allows you to make the repair in place without dismantling the equipment. Mil-Arc 24 high nickel content gives you the ability to weld on thin casting without cracking. The deposit has excellent machinability when running at least two passes over the application. Note: The first pass of any weld filler will have some amount of base metal dilution. Applying at least a second pass over the first will dilute any hard spots which will increase the machinability of the deposit. Mil-Arc 24 typically requires no preheat on castings including: pump housings, vessels, gears, sprockets, engine blocks, transmission cases, etc.


Use Mil-Prep beveling and piercing electrode to remove cracks and fatigued metal. Drill or pierce holes into casting at the end of cracks. If necessary, use a low resin grinding wheel and wire brush to finish the preparation. Apply deposit using a short arc and stringer beads, skip weld and peen lightly. Keep heat input on small, thin sections at a "hands-on" temperature. Pause and let slow cool to prevent overheating. For heavy sections, preheat to 500 F and maintain temperature within a 50 F degree radius until finished. Then, slow cool preferably within a confined ambient temperature area.


Tensile strength: up to 60,000 psi
Hardness: HB 150

Current and Polarity: AC/DCEP (+)
Part #DiameterAmperage
SMAW Nickel

Millennium Industrial Corporation
Export, PA 15632

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