OJ71T1000000450F0044 - Josef OJ711 E71T-1 Flux Core MIG Wire 0.045 44lb Spool

Technical Specification: E71T-1 Carbon Steel Flux Core Wire

The Josef OJ711 is a premium gas-shielded flux-cored arc welding (FCAW-G) wire designed for joining carbon steels. Conforming to AWS A5.20 E71T-1 standards, this 0.045-inch wire is optimized for both single and multi-pass welding applications. It is characterized by a rutile-based slag system which provides excellent weldability, high deposition rates, and deep penetration, making it superior to solid wires for welding on thicker plate materials or materials with light surface contaminants such as mill scale or rust.

Metallurgical Properties and Performance
This wire is engineered to deliver consistent mechanical properties, typically offering tensile strengths exceeding 70,000 psi. The flux core contains deoxidizers and slag formers that protect the weld pool and shape the bead. The fast-freezing slag supports the molten puddle, enabling high-quality vertical and overhead welds. It operates on Direct Current Electrode Positive (DCEP) polarity. While it can be used with 100% CO2, using a 75% Argon / 25% CO2 mixture will generally result in a smoother arc transfer and slightly higher manganese and silicon recovery in the weld metal.

Applications and Usability
The 44lb spool size is an industry standard for shop floor wire feeders, providing a balance between portability and run-time. The 0.045-inch diameter is a versatile size, capable of welding thin gauge sheet metal at lower parameters while possessing the current carrying capacity to weld heavy structural sections at higher amperages. Common applications include shipbuilding, structural steel erection, heavy machinery fabrication, and general maintenance and repair. The wire's ability to bridge gaps and handle less-than-perfect fit-ups makes it an indispensable consumable for professional welders seeking reliability and performance.