Solution Welding Flux-Cored RodsThe Strongest, Fastest, and Easiest Aluminum Fabrication or Parts Repair no expensive equipment required. Makes a sound joint with slight penetration to base metal that is stronger than mild steel. Join thick or thin parts with a 45,000 lb tensile strength. Product Benefits: The easy to melt welding rods are high quality special rods that are mainly used for welding brazing aluminum and aluminum alloys. However, they can also be used for hard welding