S283512-025 - Hobart FabCO 811B2 .045 Chrome-Moly Flux Core Wire 15kg

Technical Overview of Hobart FabCO 811B2

The Hobart FabCO 811B2 is a premium gas-shielded flux-cored wire specifically engineered for the welding of low alloy steels containing 1.25% Chromium and 0.5% Molybdenum. This wire is formulated to meet the rigorous demands of high-temperature service applications found in power generation, petrochemical refineries, and pressure vessel fabrication. With an AWS classification of E81T1-B2C and E81T1-B2M, it delivers consistent mechanical properties and excellent creep resistance, making it the preferred choice for joining ASTM A387 Gr. 11 plates and A335 Gr. P11 pipes.

One of the defining characteristics of the FabCO 811B2 is its versatility in shielding gas selection. It operates effectively with both 100% CO2 and a 75% Argon / 25% CO2 blend. Using mixed gas typically provides a smoother arc and reduced spatter, while CO2 offers deeper penetration and cost-effectiveness. The wire features a fast-freezing slag system, which facilitates all-position welding, including vertical-up and overhead, without sacrificing bead contour or weld integrity. This capability is essential for field erection and complex pipe spool fabrication where positioning the workpiece is not always feasible.

Metallurgically, the deposit produced by FabCO 811B2 is designed to maintain high strength and ductility even after prolonged exposure to elevated temperatures. The vacuum-sealed packaging (Vpsp) ensures that the wire remains moisture-free during storage and transport, a critical factor in preventing hydrogen-induced cracking in sensitive low-alloy steels. Welders and QA inspectors alike appreciate the wire's low fume generation and easy slag detachability, which streamline the post-weld cleaning process and improve overall operational efficiency.

For industrial sectors requiring code-compliant welds on Chrome-Moly steels, the Hobart FabCO 811B2 offers a reliable, high-performance solution. Its balanced chemistry ensures that the weld metal matches the base material's thermal expansion and creep rupture properties, ensuring the longevity and safety of critical infrastructure components.