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 | ||||||
| Ag | Cu | P | Sn | °C | °C | g/cm3 | kg/mm2 | ISO 17672 | EN 1044 | AWS A5.8 | ||
Copper-Phosphorus alloys |
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| 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 |
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| CuP7Sn | – | Bal. | 7 | 7 | 650-700 | 700 | 8 | 60 | CuP 386 | CP 302 | ~ BCuP-9 | |
Copper-Phosphorus alloys with Silver |
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| 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 | |
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| 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 | ||||
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Rods | Ø;: | 1,5 ÷ 4 mm | Length: 500 / 1.000 mm |
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Coated rods | Ø: | 1,5 – 2 mm | Length: 500 mm |
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Wires | Ø: | 0,5 ÷ 3 mm | Coils and spools |
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Strips (Ag5CuP and Ag15CuP) | 0,1 ÷ 1 mm | Width: 1,3 → 120 mm | |
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Powder and Paste | |||
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Rings | |||
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Preforms from Wire and from Strip | |||