S247029-002 - Hobart Fabco TR-70 3/32" Flux-Cored Wire, 60lb Coil

Technical Overview: Hobart Fabco TR-70 (AWS E70T-1C)

The Hobart Fabco TR-70 is a gas-shielded, flux-cored electrode (FCAW-G) designed for single and multiple pass welding of mild and some low-alloy steels. Classified under AWS A5.20 as E70T-1C and E70T-9C, this 3/32-inch diameter wire is engineered for high-amperage welding in the flat and horizontal positions. It utilizes 100% CO2 shielding gas, leveraging the deep penetration characteristics of carbon dioxide to ensure solid root fusion on thick plate sections. This makes it an industry standard for heavy structural fabrication, shipbuilding, and the manufacturing of heavy earthmoving equipment.

Technically, the Fabco TR-70 features a rutile-base slag system that provides a smooth, spray-like transfer. Despite being a rutile wire, it offers penetration profiles often associated with more aggressive arc characteristics. The wire chemistry is balanced to provide excellent mechanical properties, typically yielding tensile strengths in the range of 70,000 psi (480 MPa) or higher, meeting stringent code requirements. The slag coverage is complete and relatively thick, helping to shape the bead and support the molten puddle at high currents, yet it remains easy to remove, reducing inter-pass cleaning time in multi-pass welds.

Welders should note that this wire is strictly for flat (1G) and horizontal (2F) positioning due to the fluidity of the weld pool. It operates on DCEP (Direct Current Electrode Positive) polarity. The 3/32" diameter allows for significant current carrying capacity, enabling high wire feed speeds and deposition rates that can exceed those of solid wires or smaller diameter cored wires. It is particularly effective on steels with moderate surface contaminants such as mill scale or light rust, thanks to the deoxidizers present in the flux core. However, for optimal X-ray quality results, proper joint preparation is always recommended.

Operational Parameters and Specifications

• AWS Class: E70T-1C, E70T-9C
• Shielding Gas: 100% CO2
• Current: DCEP
• Positions: Flat and Horizontal only
• Typical Applications: Non-alloyed structural steels, heavy machinery, girders.