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

Premium Seamless Flux-Cored Wire for Critical Applications

The Hobart MEGAFIL® 731 B is a state-of-the-art seamless basic flux-cored wire designed for the most demanding industrial welding applications. Engineered with Hobart's advanced seamless manufacturing technology, this 1/16-inch (1.6mm) wire features a hermetically sealed copper-coated surface that completely protects the internal flux from moisture absorption. This unique design ensures extremely low diffusible hydrogen levels (typically less than 3ml per 100g of weld metal), making it an exceptional choice for welding high-strength steels where cold cracking is a major concern. The 35 lb spool provides ample material for continuous operation in heavy fabrication environments, reducing downtime associated with frequent spool changes.

Unlike traditional folded wires, the MEGAFIL 731 B offers superior feedability and arc stability. The copper coating enhances electrical conductivity, reducing contact tip wear and ensuring consistent current transfer even over long conduit runs. This wire utilizes a basic slag system, which is renowned for producing weld deposits with superior mechanical properties, particularly impact toughness at low temperatures (down to -40°C/-40°F). It is an all-position wire, allowing operators to tackle complex joints in vertical and overhead positions without sacrificing weld quality. The slag is easily removable, and the bead profile is smooth and uniform, reducing post-weld cleanup time and improving overall efficiency.

Industries such as offshore construction, pipeline fabrication, and pressure vessel manufacturing rely on the MEGAFIL 731 B for its reliability and performance. It is specifically formulated to meet the rigorous requirements of AWS E71T-5M-J and E71T-5C-J classifications. Whether using mixed gas or 100% CO2, this wire delivers deep penetration and excellent fusion, ensuring structural integrity in critical components. By choosing the MEGAFIL 731 B, fabricators can achieve high-quality welds with minimal risk of defects, ultimately lowering production costs and improving project timelines. Its resistance to moisture pickup also means it has an extended shelf life compared to standard flux-cored wires, providing peace of mind for inventory management.