BB18 - 3.2mm Low Fuming Bare Bronze Brazing Rod (1/8")

Versatile 3.2mm Bare Bronze Brazing Rods

The BB18 Bare Bronze Brazing Rod (3.2mm / 1/8") is a premium low-fuming alloy designed for general-purpose oxy-acetylene brazing. Known for its versatility and ease of use, this rod is a staple for maintenance workshops, automotive repair, and metal fabrication. Unlike flux-coated alternatives, this bare rod allows the welder to control the exact amount of flux applied, ensuring precision in every joint. It is specifically formulated to minimize fuming during the heating process, providing a clearer view of the weld pool and a safer working environment when used with proper ventilation.

This rod excels in joining a wide range of metals. It is commonly used for brazing steel, cast iron, malleable iron, copper, bronze, and brass. Because it is a bare rod, it requires the use of a separate brazing flux (typically borax-based) to clean the base metal and prevent oxidation during the process. The resulting deposit is dense, free of porosity, and offers excellent machinability, making it ideal for building up worn surfaces or repairing broken castings.

Whether you are repairing a cracked cast iron housing, joining galvanized pipes, or fabricating artistic metalwork, the 3.2mm diameter provides good deposition rates for medium-to-heavy gauge materials. The alloy flows smoothly at brazing temperatures, wetting out evenly on properly prepared surfaces to create strong, ductile, and corrosion-resistant joints.

Common Uses

• Repairing fractured cast iron components


• Joining dissimilar metals (e.g., steel to copper)


• Maintenance repair on galvanized steel


• Building up worn bearings, pistons, and gear teeth


• Plumbing and HVAC fabrication involving brass or bronze fittings