E6013 - General Purpose. Smooth bead with low spatter. High quality bead appearance E6011 - Deep Penetration. Flat bead with deep penetrating arc. Better for dirty or rusted steel E7014 - Fast Fill. Smooth bead with fast deposition. Better for joints with poor fit up E7018 - High Strength, Low Porosity. Slow porosity for stronger weld. Ideal for pipes and fabrication.