Dual Shield R-70 Ultra is a low fuming flux cored wire with a balanced chemistry that allows for a greater tolerance of mill scale and surface oxides than is normally associated with an E70T-1 class of wire. The "Ultra" series produces smoother arc characteristics and lower welding fumes than non-ultra types. Notch toughness in the as welded condition is also improved with this wire. Bead contour is flat to slightly convex and slag coverage is complete. Dual Shield R-70 Ultra wire is designed for single or multipass applications on low or medium carbon steels. It is intended for use in the flat and horizontal positions with 100% CO2 or 75%Argon / 25% CO2 shielding gas. Areas of application include railcar, heavy equipment, and general fabrication.