✔ Composition & Melting Behavior
Alloy: Cu-7.5%P-0.2%Ag (common variant of CuP8).

Melting Range: 710–800°C (solidus-liquidus).

Self-Fluxing: Phosphorus (P) acts as a flux, removing oxides during heating (no separate flux needed for copper joints).

✔ Mechanical & Joint Strength
Shear Strength: ~150–220 MPa (depends on base metal and joint design).

Ductility: Moderate (better than high-P alloys like CuP10).

Electrical Conductivity: ~15–20% IACS (lower than pure Cu due to P content).

✔ Wetting & Flow Characteristics
Excellent wetting on copper & copper alloys (brass, bronze).

Not suitable for ferrous metals (steel, cast iron) – Forms brittle iron phosphides (Fe3P).

Best for capillary gap brazing (0.05–0.2 mm clearance).

✔ Corrosion & Thermal Resistance
Good corrosion resistance in water/refrigerant systems (used in HVAC, plumbing).

Service Temperature: Up to 200–250°C (avoid high-stress high-temp applications).