USA 7018 is the most efficient general purpose, iron powder-low hydrogen electrode used for welding carbon steels, free-machining steels, and low alloy steels with a minimum yield strength of 50,000 psi. USA 7018 has a very good deposition rate, providing a quiet steady arc with low spatter and medium penetration. Weld deposits are of X-ray quality with easy slag removal, exceptional mechanical properties and a smooth uniform bead appearance. USA 7018 has excellent operator appeal and may be used in any position with AC or DC (reverse polarity). Comes in a 10lb box.