A phosphor-bronze rod containing 7% tin and suitable for oxy/fuel welding of phosphor bronze castings, copper alloys and brass.

Sifphosphor Bronze No 8 is also used for TIG brazing brass, ferrous, stainless and dissimilar metals.

• To TIG weld phosphor bronze, use DC current with pure argon shielding gas, a closely matched filler rod
• Ensure all surfaces are clean.
• Bronze has high thermal conductivity, meaning it dissipates heat quickly. Keep the torch angle correct to avoid balling up the filler rod and to prevent overheating and washout of the base metal
• Maintain consistent heat and torch angle, using a tight arc and a consistent travel speed to avoid overheating or balling up the filler rod
• The process requires a tighter window for applying the heat, so avoid excessive heat to prevent fractures. Also space beads further apart if needed
• Prone to porosity, so reduce heat input, and do not feed directly into the TIG arc
• Apply in stages, grinding between passes to remove lead drawn into the joint. This will reduce porosity