15% Silver Brazing alloy rod for brazing copper. Commonly used in plumbing & HVAC applications; copper pipe, hot water tanks, etc. Excellent for gap-filling where close fit-up does not exist, and where thermal expansion and service vibration are involved. When heated above liquidus temperature will flow into tight connections. Highest joint ductility and strength in HVAC-R applications. Melting Range (approx): 645-800°C. AWS Specification A5.8-B CuP5.