COPPER-PHOSPHORUS ALLOYS

The Copper-Phosphorous alloys are extensively used to join copper and copper alloy base metals (brass, bronzes).
They have self-fluxing properties when used on copper and may or may not contain Silver.
A flux is required when joining brass or bronze.
Continuous service operating temperatures of joints brazed with these alloys range up to approx 200 °C.
Corrosion resistance is satisfactory, except when the joints are exposed to sulfurous environments, especially at elevated temperatures.
Copper-Phosphorous alloys should not be used on ferrous, nickel based alloys, or copper-nickel alloys with more of 10% nickel, in order to avoid premature failure of the joint due to the formation of brittle intermetallic phases.
They are available in rods, wires, rings, preforms, pastes and powders.
Ag15CuP is also available in strip form.

NEW PRODUCTS: ask for the newly introduced PLUS version of Copper-phosphorus alloys for copper brazing!

Code Composition % Melting Range SOL-LIQ Flow point Density Tensile strength Standard Pdf
Ag Cu P Sn °C °C g/cm3 kg/mm2 ISO 17672 EN 1044 AWS A5.8

Copper-Phosphorus alloys

CuP5 Bal. 5 710-925 790 CuP 178
CuP6 Bal. 6,3 710-890 760 8,1 56 CuP 179 CP 203
CuP7 Bal. 7,3 710-820 730 8,1 58 CuP 180 CP 202 BCuP-2
CuP8 Bal. 7,8 710-770 720 8 60 CuP 182 CP 201

Copper-Phosphorus alloys with Tin

CuP7Sn Bal. 7 7 650-700 700 8 60 CuP 386 CP 302 ~ BCuP-9

Copper-Phosphorus alloys with Silver

Ag0,4CuP 0.4 Bal. 6,6 650-810 750 8,2 58
Ag2CuP 2 Bal. 6,5 645-825 740 8,1 55 CuP 279 CP 105
Ag2CuP HP 2 Bal. 7 643-788 740 8,1 CuP 280 BCuP-6
Ag5CuP 5 Bal. 6 645-815 710 8,2 55 CuP 281 CP 104 BCuP-3
Ag5CuP HP 5 Bal. 6,75 643-771 710 8,2 CuP 282 BCuP-7
Ag6CuP LP 6 Bal. 6,2 643-800 720 8,3
Ag6CuP 6 Bal. 7 643-813 720 8,3 55 CuP 283 BCuP-4
Ag10CuP 10 Bal. 6 650-750 720 8,3 65
Ag15CuP 15 Bal. 5 645-800 700 8,4 54 CuP 284 CP 102 BCuP-5
Ag18CuP LP 18 Bal. 6,3 643-666 670 8,4 50 CuP 285 BCuP-8
Ag18CuP 18 Bal. 7 645-645 650 8,4 50 CuP 286 CP 101

Make-up
Rods Ø;: 1,5 ÷ 4 mm Length: 500 / 1.000 mm
Coated rods Ø: 1,5 – 2 mm Length: 500 mm
Wires Ø: 0,5 ÷ 3 mm Coils and spools
Strips (Ag5CuP and Ag15CuP) 0,1 ÷ 1 mm Width: 1,3 → 120 mm
Powder and Paste
Rings
Preforms from Wire and from Strip