Cast Iron Bead Electrodes are specialized welding consumables (typically Shielded Metal Arc Welding/MMA sticks) designed for repairing, joining, or building up cast iron components. They are engineered to produce strong, ductile, and machinable welds on brittle materials like gray, malleable, and nodular cast iron by managing heat input to prevent cracking and minimize carbon uptake, which causes brittleness.