55015B - Hobart Megafil 550R .045 Seamless Flux-Cored Wire 35lb

High-Performance Seamless Flux-Cored Wire for Critical Structures

The Hobart Megafil 550R .045" is a premium seamless rutile flux-cored wire designed specifically for welding high-strength, fine-grained structural steels. Engineered with Hobart's advanced seamless technology, this wire features a hermetically sealed copper-coated jacket that completely protects the internal flux from the atmosphere. This design ensures extremely low diffusible hydrogen levels (typically under 3ml/100g), eliminating the risk of moisture absorption that plagues traditional folded wires. For industrial procurement specialists sourcing consumables for crane manufacturing, offshore platforms, or heavy earth-moving equipment, the Megafil 550R offers the reliability and metallurgical consistency required for critical safety standards.

This wire is classified under AWS A5.29 as E111T1-GM-H4, indicating a tensile strength in the 110,000 psi range (approx. 760-900 MPa) and a yield strength exceeding 690 MPa. It is formulated to perform exceptionally well in low-temperature environments, maintaining high impact toughness down to -60°C. The 35lb spool packaging fits standard industrial wire feeders, providing a substantial amount of material for continuous operation while remaining manageable for handling. The copper coating not only protects against rust but also enhances current transfer at the contact tip, reducing wear and improving arc stability.

The Megafil 550R is an all-position wire, making it versatile for complex fabrication geometries where out-of-position welding is unavoidable. It operates with mixed shielding gas (Argon/CO2), which helps achieve a smooth spray-like transfer and deep penetration. By choosing a seamless wire like the 550R, facilities can reduce the need for specialized storage conditions (like heated rooms) often required for standard flux-cored wires, thereby streamlining inventory management and reducing waste due to moisture contamination.