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$202.00/10 lb tubeThe BB18 is a 3.2mm (1/8") bare low-fuming bronze brazing rod, typically conforming to AWS A5.8 RBCuZn-C classifications. This copper-zinc alloy is modified with small additions of manganese, iron, and silicon/tin. These alloying elements serve multiple critical functions: they suppress the vaporization of zinc (reducing fumes), increase the mechanical strength of the deposit, and improve the deoxidizing properties of the molten puddle. This results in a filler metal that boasts a tensile strength often exceeding 60,000 psi, depending on the base metal and joint design.
As a bare rod, the BB18 requires the application of a suitable brazing flux. The absence of a pre-applied coating allows the operator to utilize the "hot rodding" technique—dipping the heated tip of the rod into a container of flux powder—to transfer the exact amount of flux needed to the joint. This is particularly advantageous in positional brazing or when working on contaminated base metals where heavy fluxing is required initially, followed by lighter application.
The 3.2mm diameter is substantial enough for multi-pass buildup applications and structural brazing of thicker sections. The melting range is approximately 1590°F to 1630°F (866°C to 888°C). The deposit exhibits excellent ductility and workability, allowing for post-braze machining without chattering or tool wear associated with harder alloys. It is an excellent choice for braze-welding steel and cast iron where fusion welding might cause cracking or excessive distortion due to higher heat input.
| Additional Information |
|---|
| Diameter:3.2mm (1/8") |
| Grade:Bare Bronze |
| Weld Process:Brazing, Oxy-Fuel |
| Rod Type:Bare Brazing Rod |
| Material Composition:Low Fuming Bronze (Copper-Zinc) |
| Flux Requirement:Requires External Flux |
| Applications:Steel, Cast Iron, Copper, Brass, Bronze |
| Packaging Description:10 lb tube |
| Packaging:10 lb Tube |
| Brand:Aufhauser |
| Position:N/A |
| Polarity:N/A |
