TN267 - Phos-Copper Brazing Alloy BCuP-2 Rods

Economical Copper Brazing Solution

The Techniweld TN267 Phosphorous Copper Solder Ring Rods represent a standard-setting solution for professionals in the HVAC, plumbing, and refrigeration industries. Commonly classified under the AWS BCuP-2 designation, this alloy is engineered to provide a cost-effective yet highly durable method for joining copper tubing and fittings. Unlike silver-bearing alloys, this phosphorous-copper formulation relies on the phosphorous content to act as a fluxing agent when applied to pure copper base metals. This unique metallurgical property eliminates the need for manual flux application in copper-to-copper joints, significantly streamlining the brazing process and reducing consumable costs.

These rods exhibit excellent fluidity once they reach their liquidus temperature of approximately 1460°F (793°C). This high flow rate allows the alloy to penetrate deep into capillary spaces, ensuring leak-proof seals even in tight-fitting connections. The solidus point of 1310°F (710°C) provides a manageable melting range, giving the operator control over the filler metal during the heating cycle. While primarily designed for copper, these rods can also be used on brass or bronze fittings, provided a suitable brazing flux is applied to handle the zinc oxides present in those alloys.

Techniweld ensures that the TN267 rods meet rigorous industry standards for chemical composition and cleanliness. The absence of silver in this specific alloy makes it an extremely economical choice for large-scale projects where the ductility of silver is not strictly required. It is the go-to filler metal for standard plumbing installations, air conditioning line sets, and other non-ferrous piping systems where vibration is minimal to moderate. Users should note that phosphorous copper alloys should never be used on steel or nickel-based alloys, as the formation of brittle iron-phosphides can lead to joint failure.

Technical Specifications

The TN267 rods are formulated to deliver consistent performance. The metallurgical composition ensures a strong bond with high electrical and thermal conductivity, matching the properties of the base copper material. This makes them suitable not just for fluid transport systems but also for certain electrical applications where continuity is critical. The rods are supplied in protective packaging to prevent oxidation and contamination prior to use, ensuring that every rod delivers a clean, porosity-free braze.