Copper Brazing Alloys
Brazing of steel, stainless steel, nickel and copper/nickel alloys
Resistance against corrosion and ductility make copper brazing alloys attractive for many applications. Electrical and thermal conductivity as well as wetting characteristics are excellent.
Copper brazing alloys with high purity are brazed under vacuum. Inert gas atmosphere or brazing in air is also possible.
Phosphorous Copper brazing alloys are used to reduce copper; they behave like flux.
Brazing with zinc containing copper brazing alloys leads to high-strength joints. Overheating must be avoided due to the vapor pressure of zinc.
Copper brazing alloys are also available for high temperature applications.
Products
| Product | Composition | ISO / UNS AWS | Solidus [°C] | Liquidus [°C] | |
|---|---|---|---|---|---|
| CDA 101 | 99.99Cu | – / – BVCu-1x | 1083 | 1083 | RFQ |
| BCu-1 | 99.9Cu0.1P | Cu 141 / C11000 BCu-1 | 1083 | 1083 | RFQ |
| Copperhead 124 | 99Cu | Cu 099 / – BCU-1a | 1083 | 1083 | RFQ |
| BCu-2 | 86.5Cu | Cu 087 / – BCu-2 | 1083 | 1083 | RFQ |
| CDA 102 | 99.95Cu | Cu 102 / C10200 BCu-3 | 1083 | 1083 | RFQ |
| CDA 110 | 99.9Cu | Cu 110 / C14180 BCu-1b | 1083 | 1083 | RFQ |
| CDA 521 | 91.7Cu8Sn0.3P | – / – RCuSn-C | 882 | 1027 | RFQ |
| CuSn12 | 87.8Cu12Sn0.2P | Cu 925 / C92501 – | 825 | 990 | RFQ |
| 87.75Cu12Ge0.25Ni | 880 | 975 | RFQ | ||
| CB 235 | 67.5Cu23.5Mn9Ni | 925 | 955 | RFQ | |
| CDA 773 | 48Cu41.25Zn10Ni0.5Si0.25P | Cu 773 / C77300 RBCuZn-D | 921 | 935 | RFQ |
| CB 380 | 52.5Cu38Mn9.5Ni | 880 | 925 | RFQ | |
| X-55 (CDA 548) | 55Cu34.85Zn6Ni 4Mn0.15Si | 880 | 920 | RFQ | |
| CB 120 | 54.85Cu25Zn8Ni12Mn0.15Si | 855 | 915 | RFQ | |
| CDA 470 | 59Cu40.4Zn0.6Sn | Cu 470 / C47000 RBCuZn-A | 888 | 899 | RFQ |
| CDA 681 | 58Cu40Zn0.8Fe1Sn0.2Mn | Cu 471 / C47100 RBCuZn-C | 866 | 888 | RFQ |
| CDA 680 | 58Cu39.4Zn0.8Fe1Sn0.5Ni0 2Mn0.1Si | Cu 681 / 68100 RBCuZn-B | 866 | 882 | RFQ |
| Silver Phos 5 | 89Cu6P5Ag | CuP 281 / C55281 BCuP-3 | 643 | 813 | RFQ |
| Silver Phos 6 | 88Cu6P6Ag | 643 | 807 | RFQ | |
| Silver Phos 15 | 80Cu15Ag5P | CuP 284 / C55284 BCuP-5 | 643 | 802 | RFQ |
| Phos Copper 0 | 92.75Cu7.25P | CuP 181 / C55181 BCuP-2 | 710 | 793 | RFQ |
| Silver Phos 2 | 91Cu7P2Ag | CuP 280 / C55280 BCuP-6 | 643 | 788 | RFQ |
| Silver Phos 5HP | 88.25Cu6.75P5Ag | CuP 282 / C55282 BCuP-7 | 643 | 771 | RFQ |
| Silver Phos 6HP | 86.75Cu7.25P6Ag | CuP 283 / C55283 BCuP-4 | 643 | 718 | RFQ |
| Silver Phos 2LP | 91.5Cu6.5P2Ag | 643 | 704 | RFQ | |
| Tin Phos 7 | 86.8Cu6.5P6.5Sn0.2Si | CuP 385 / C55385 BCuP-9 | 637 | 675 | RFQ |
| Silver Phos 18 | 76.05Cu17.6Ag6.35P | CuP 285 / C55385 BCuP-8 | 643 | 666 | RFQ |
| Silver Phos 18M | 75.75Cu18Ag6.25P | 643 | 665 | RFQ |