Silver-containing copper hard solder Cu-Rophos 15for flux-free soldering of copper.Phosphorous copper hard solder for flux-free soldering of copper pipes in oil, gas and liquefied gas installations as well as in the heating and drinking water installation via 28 x 1.5 mm pipe dimensions. Thanks to the silver content, it is best suited for applications in the cold climate area and in systems subject to vibration. Excellent flow properties, for copper to copper without additional flux, for soldering on brass and red cast, a hard solder flux ( Cu-Rosil® according to DIN EN 1045 â FH 10) must also be used. Suitable for soldering on gas and liquefied gas systems (operating temperatures from -70 to +150°C).This text is machine translated.