A flux-cored wire is optimized to obtain performance not possible with a solid wire. Welding applications such as vertical-up welding, flat welding, welding over galvanized, or welding steels, a flux-cored wire provides better quality welds in a shorter amount of time.
Gas-shielded flux cored wire require external shielding gas and the slag is easy to remove. When welding on thicker metals or out-of-position applications, gas-shielded is the way to go. Self-shielded flux cored wire does not require external shielding gas; the weld pool is protected by gas that is generated when flux from the wire is burned. This makes it more portable since it does not require an external gas tank.
Several popular types of flux-cored wires increase welding productivity. The E71T-1 wires offer unsurpassed performance for semi-automatic out-of-position welding. The wire’s fast freezing rutile slag provides the highest deposition rates, up to seven pounds per hour. They also offer an extremely smooth welding arc with minimal spatter. The E71T-1 wire is the world’s most popular flux-cored wire and is a top choice for steel fabrication applications, structural steel, and shipbuilding.
If the welding is taking place without shielding gas, the E71T-8 wires offer the highest deposition rates. This wire is self-shielded, so it can be used outdoors and in field erection of structural steel.
The E70T-4 wire is the fastest way to join thick steel plates in the flat position. It is self-shielded, ideal for outdoor use, and has a deposition rate of up to 40 pounds per hour.
The highest deposition rate gas-shielded flux-cored wire is the E70T-1. It offers a smoother welding arc than the E70T-4, although it does have a slightly lower deposition rate. It can handle dirty plates and uses lower-cost carbon dioxide shielding gas. They are widely used in steel fabrication shops.
For welding coated and galvanized sheet steels, the ideal wire is the E71T-14. It is self-shielded and has core materials that explode in the arc. This explosion volatizes the steel coating to minimize cracking and porosity. Higher quality welds are the result, as well as faster welding speeds. These wires are widely used in the automotive industry.
Finally, the E70T-5 gas-shielded wire is the fastest way to weld hard-to-weld steels. This wire offers crack resistance through its basic slag system that removes phosphorus and sulfur from the weld metal. The E70T-5 has the lowest diffusible hydrogen levels among the flux-cored wires, resulting in superior resistance to delayed hydrogen cracking.
RobotWorx is a certified industrial welding robot integrator. We work daily with companies to help them choose the right welding systems to include welding wire. We carry a variety of flux cored wire options that you can choose from. Contact us today at 740-251-4288.