Which type of alloy allows joining copper tube to wrought copper fittings without the need for flux?

The BCuP series of alloys is specifically designed for brazing copper to copper and comes with properties that allow it to create strong, durable joints without the use of flux. These alloys contain phosphorus, which acts as a deoxidizer during the brazing process, allowing for clean and effective bonding. This is particularly advantageous in situations where joints need to be made efficiently and with minimal preparation.

In contrast, other options may require flux to facilitate joining processes. For instance, lead and tin alloys typically require a higher melting point and do not bond as effectively with copper without additional substances, while BAg series alloys, although they can join copper components, generally necessitate the use of flux to ensure good joint integrity. The BCuP series is therefore optimal for direct copper-to-copper connections, making it the preferred choice in these applications.