S289512-053 - Hobart Fabco 812C .045 Flux-Cored Wire, 33lb VPSP

Technical Overview of Hobart Fabco 812C

The Hobart Fabco 812C (SKU: S289512-053) is a premium gas-shielded flux-cored wire designed to meet the rigorous demands of heavy industrial fabrication. Classified under AWS A5.29 as E81T1-Ni1C-J H4, this consumable is engineered specifically for use with 100% CO2 shielding gas. The wire features a nominal 1% Nickel alloy composition, which is critical for maintaining high impact toughness in low-temperature environments. This makes it an ideal choice for applications where the weldment is subject to harsh weather conditions or dynamic loading at sub-zero temperatures, such as offshore platforms and shipbuilding.

One of the defining technical characteristics of the Fabco 812C is its "H4" diffusible hydrogen designation. The wire is supplied in a Vacuum Packed Spool (VPSP), which hermetically seals the product against atmospheric moisture during storage and transport. This packaging ensures that the wire delivers a weld deposit with less than 4ml of diffusible hydrogen per 100g of weld metal right out of the box, significantly mitigating the risk of hydrogen-induced cracking (cold cracking) in high-strength low-alloy steels.

Mechanically, the Fabco 812C excels in providing a tensile strength in the range of 80,000 to 90,000 psi, depending on heat input and pass sequence. The rutile-based slag system is formulated to be fast-freezing, which supports all-position welding capabilities, including vertical-up and overhead, without sacrificing bead contour or wetting action. The arc characteristics are optimized for CO2, providing a stable transfer with minimal spatter, which enhances deposition efficiency and reduces post-weld cleaning time.

This .045-inch diameter wire is suitable for single and multi-pass welding on mild and low-alloy steels. It is particularly effective for joining weathering steels or grades requiring Charpy V-Notch toughness values of 20 ft-lbs at -40°F (-40°C). The 33lb spool size is standard for industrial wire feeders, providing a balance between portability and run-time duration.