Forney 45860 Superblast Gouging Specialty Rod, 1/8-Inch, 1-Pound All position nickel iron electrode used to repair cast iron or to weld cast iron to steel producing dense, hard and crack resistant welds Not easily machined, requires carbide tools Welds are stronger than Super Ni Cast 99-Percent welds Typical applications are grade 30, 40 and 50 gray cast irons Ideal for repairing sewer pipe, machine base, transmission and gear housing also repair and build up of gears