S655519-002 - Hobart FabCO 125K4 1/16" Flux Core Wire 60lb Coil

High-Strength Low Alloy Flux Core Wire

The Hobart FabCO 125K4 is a premium 1/16-inch gas-shielded flux-cored wire designed specifically for the welding of quenched and tempered low alloy grades of steel. Engineered with a basic slag system, this wire delivers a weld deposit with very high strength and excellent ductility, making it an essential consumable for industrial fabrication requiring superior mechanical properties. The wire meets AWS E120T5-K4C H4 classifications, ensuring it adheres to rigorous standards for tensile strength and low hydrogen content.

Performance and Reliability

One of the standout features of the FabCO 125K4 is its ability to maintain excellent impact values even at low temperatures. This toughness is critical for structures subjected to harsh environments or dynamic loading. The basic slag formulation not only contributes to the mechanical integrity of the weld but also ensures a low diffusible hydrogen content (H4 designation). This characteristic is vital for minimizing the risk of hydrogen-induced cracking, particularly when welding thick sections of high-strength low-alloy (HSLA) steels. The wire is formulated for use with 100% CO2 shielding gas, providing deep penetration and reliable fusion.

Industrial Applications

This 60 lb coil is optimized for heavy-duty industrial applications where productivity and weld quality are paramount. It offers high deposition rates, allowing for faster travel speeds and reduced downtime during multi-pass operations. Common applications include the fabrication and repair of heavy equipment, crane manufacturing, shipbuilding, and the welding of casting repairs. Whether utilized in single or multi-pass scenarios, the Hobart FabCO 125K4 provides the consistency and performance required by professional welding operations.