S235012-029 - Hobart Tube-Alloy Buildup-G .045 Metal-Cored Hardfacing Wire 33lb

Technical Overview of Hobart Tube-Alloy Buildup-G

The Hobart Tube-Alloy Buildup-G is a premium gas-shielded, metal-cored wire engineered for the restoration and buildup of mild and low alloy steel components. With a diameter of .045 inches and packaged in a 33-pound spool, this consumable is designed for high-deposition industrial applications where structural integrity and impact resistance are paramount. The wire deposits a low alloy steel specifically formulated to serve as a buffer layer or 'cushion' beneath harder, more brittle abrasion-resistant overlays.

Technically, the Tube-Alloy Buildup-G operates using Direct Current Electrode Positive (DCEP) and requires a shielding gas mixture, typically 75% Argon and 25% CO2. This gas-shielded metal-cored process (MCAW) combines the high deposition rates of flux-cored welding with the high efficiency and low slag generation of solid wire MIG welding. The resulting deposit boasts a hardness range of approximately 25-30 HRC (Rockwell C) or 250-300 HB (Brinell), providing exceptional compressive strength. This property is critical for preventing the collapse of the base metal under high-load conditions, which would otherwise cause the harder overlay to crack or spall.

The deposit is sound, dense, and free from porosity when applied correctly. It is suitable for unlimited buildup thickness, meaning operators can apply multiple passes to restore parts to their original dimensions before applying the final hardfacing cap. Furthermore, the deposit remains machinable, allowing for the resurfacing of parts like crane wheels or shafts that require precise dimensional tolerances after welding. It is an essential consumable for heavy industrial maintenance in sectors such as mining, steel production, and construction.