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The Weld Star CP4 (L-Ag5P) is a high quality Copper Phosphorus brazing alloy enriched with 5% Silver. This specific formulation is engineered for professionals who require a balance of exceptional capillary flow and increased joint ductility.
Unlike standard copper phosphorus rods, the 5% silver content allows the joint to better handle the thermal cycling and mechanical vibrations common in refrigeration, air conditioning, and heating systems. The phosphorus content acts as a self fluxing agent when joining copper to copper, ensuring clean, high strength bonds with minimal preparation. Specifically designed for precision work, these 3.0mm rods offer a controlled melting range that makes them ideal for bridging slightly irregular gaps in pipework.
Key Features
5% Silver Enrichment: Significantly improves the ductility of the brazed joint compared to silver free alloys, reducing the risk of leaks due to vibration.
Superior Capillary Flow: Highly fluid when molten, allowing the alloy to penetrate deep into tight fitting socket joints.
Self Fluxing on Copper: The phosphorus content eliminates the need for additional flux when brazing copper to copper (note: flux is required for brass/bronze).
Vibration Resistant: The preferred choice for HVAC and cooling systems where compressors and thermal expansion put joints under constant stress.
Corrosion Resistant: Provides a long lasting, leak proof seal in plumbing and industrial gas installations.
