S289812-053 - Hobart Fabco 750M .045 High-Strength Flux-Cored Wire 33lb

Hobart Fabco 750M .045" Flux-Cored Wire Technical Overview

The Hobart Fabco 750M is a premium gas-shielded flux-cored wire engineered for the welding of high-strength low-alloy (HSLA) and quenched and tempered (Q&T) steels. With a diameter of 0.045 inches and packaged in a 33-pound vacuum-packed spool, this consumable is designed to meet the rigorous demands of heavy industrial fabrication, particularly in the offshore and heavy equipment sectors. The wire is formulated to provide a nominal tensile strength in the 110,000 psi (110 ksi) range, making it suitable for matching the mechanical properties of steels such as ASTM A514, A710, and HY-80.

Technically, the Fabco 750M utilizes a mixed shielding gas comprising 75-80% Argon and a balance of CO2. This gas mixture assists in stabilizing the arc and refining the droplet transfer, resulting in a smooth spray-like transfer with minimal spatter. The flux composition is designed to produce a fast-freezing slag, which supports all-position welding capabilities, including vertical-up and overhead, without sacrificing bead contour or weld quality. A critical feature of this wire is its low diffusible hydrogen content (typically H4 classification), which is essential for preventing hydrogen-induced cracking (cold cracking) in high-strength steels that are susceptible to such defects.

The metallurgical deposit of the Fabco 750M typically includes Nickel and Molybdenum to achieve the required strength and toughness. It exhibits excellent Charpy V-Notch (CVN) impact properties at temperatures as low as -40°F (-40°C), ensuring structural integrity in harsh, cold environments often encountered in offshore drilling and subsea applications. The vacuum packaging (Vpsp) further protects the wire from moisture absorption during storage, ensuring that the low-hydrogen characteristics are maintained right up to the moment of welding.