The Weld Star CP2 (L-Ag2P) is a high performance Copper Phosphorus brazing rod featuring a 2% Silver addition. This specific alloy is designed to provide better joint ductility and capillary flow than basic copper phosphorus rods, making it easier to achieve consistent, leak proof seals in domestic and industrial copper pipework.
The 2% silver content lowers the liquidus temperature slightly and increases the alloy's ability to withstand moderate vibration and thermal expansion. Like other phosphorus based alloys, the CP2 is self-fluxing on copper to copper joints, which speeds up the installation process and reduces the need for post braze cleaning. These 3.0mm rods are widely used by plumbing and heating engineers for water systems, gas lines, and general refrigeration work.
Key Features
2% Silver Content: Provides better ductility than standard Cu-P rods, helping the joint resist cracking under thermal stress.
Improved Fluidity: The silver addition enhances the capillary action, ensuring the alloy pulls deep into the socket for a full strength bond.
Self-Fluxing on Copper: The phosphorus content removes surface oxides automatically, eliminating the need for separate flux on copper to copper connections.
Economical Performance: Offers a professional "middle ground" between basic rods and expensive high silver alloys.
Versatile Sizing: The 3.0mm diameter is ideal for standard pipe sizes found in residential and commercial plumbing.
Clean Deposits: Produces smooth, tidy fillets that require minimal finishing.
