Nickel-iron electrode for cold welding of gey cast iron with lamellar and globular graphite structure and malleable iron; also suited for joints of of cast iron (GGL and GGG types) with unalloyed steel materials; high ampacity, stable arc and good wetting abilities due to bi-metallic core wire. A higher strength can be achieved compared to welding with Ficast Ni. The weld metal is machinable and highly crack-resistant.