73133B - Hobart MEGAFIL 731 B Seamless Basic Flux-Cored Wire, 1/16, 35lb

Superior Toughness and Arc Control

Experience the difference of welding with the Hobart MEGAFIL® 731 B, a 1/16-inch seamless flux-cored wire built for welders who demand precision and durability. This wire stands out in the shop or field due to its basic slag formulation, which provides exceptional crack resistance and high impact toughness, even in sub-zero environments. The seamless design means the wire is stiffer and feeds more smoothly than traditional folded flux-cored wires, minimizing bird-nesting and liner friction. With a 35 lb spool, you can maintain high productivity with fewer changeovers, keeping your arc on longer and your projects moving forward.

The MEGAFIL 731 B is an all-position wire, giving you the versatility to weld flat, horizontal, vertical-up, and overhead with confidence. The arc is stable and predictable, producing a flat to slightly convex bead with excellent tie-in at the toes. While basic slags can sometimes be heavier, the MEGAFIL 731 B is engineered for manageability, allowing for easy slag removal. The copper coating not only protects the wire from rusting during storage but also improves electrical contact, resulting in a smoother arc start and consistent burn-off. This is particularly beneficial when welding thick sections or restrained joints where weld integrity is paramount and restart defects must be avoided.

Designed for use with both mixed gas (Argon/CO2) and 100% CO2, this wire offers flexibility depending on your shop's setup and the specific procedure requirements. It excels in heavy equipment repair, structural steel erection, and shipbuilding. The low hydrogen content is a critical safety factor, significantly reducing the risk of hydrogen-induced cracking in high-strength steels. When your project requires a weld that can withstand high stress and dynamic loading, the Hobart MEGAFIL 731 B delivers the mechanical properties and welder appeal necessary to get the job done right. It represents the pinnacle of flux-cored wire technology, combining the ease of use of a cored wire with the low-hydrogen safety of a solid wire.