5280 RB Hard solder

5280 RB

Brazing alloy based on copper-silver-phosphorus with a high degree of purity. Very smooth melting behavior and good flow properties. Low viscosity, yet moldable. Smooth, dense and non-porous seams. The solder has a deoxidizing effect on copper, so no flux is required. Permissible operating temperatures up to 150 °C.

Technical data
Brazing alloy
ISO 17672: ~ CuP 279
EN 1044: ~ CP 105
DIN 8513: ~ L-Ag2P

Melting interval (Sol./Liq.) [°C]: 650 - 820
Soldering temperature [°C]: ~ 740
Elongation [%]: 6.0
Density [g/cm³]: 8.1

Applications
For joint and gap soldering, also in series production, of e.g: Copper (SF-Cu), gunmetal, bronze (CuSn alloys), brass (CuZn alloys), nickel silver (CuNiZn alloys), Al-bronze (CuAl alloys). Well suited for bridging wide gaps. For joining thin-walled workpieces and those with different wall thicknesses.

Typical applications are
Rotors of electric motors, pipe connections, pipe coils, copper connections of cooling systems,
sanitary installations, appliances for air conditioning systems, heating installations. Not to be used with media containing sulphur or on iron or nickel alloys.

Processing instructions
Clean soldering areas. Round off edges. Coat soldering surfaces with flux. Heat the tip of the soldering rod and dip it into the flux. Preheat the workpiece widely and continuously. Do not overheat. Remove corrosive flux residues.
Heat sources: Flame soldering (acetylene; neutral), furnace, induction and resistance heating, TIG.

Delivery form
Castolin RB 5280: bare brazing rods, round