Copper and phosphorus are the two major elements in the copper-phosphorus brazing alloys The alloys have good fluidity, low melting temperature and the trait of self-fluxing.
They are used in the brazing of copper and copper alloys in resistance brazing, flame brazing and induction brazing without the use of flux. As phosphorus is likely to cause the formation of brittlement in iron, the brazing alloys are rarely used in the brazing of ferrous metals.
|
Standards
|
Composition %
|
Melting Range
|
|
ISO 17672
|
EN 1044
|
Ag
|
Cu
|
Zn
|
Sn
|
ºC
|
|
CuP 178
|
-
|
|
94
|
5
|
|
710-925
|
|
CuP 179
|
CP 203
|
|
93.8
|
6,2
|
|
710-890
|
|
CuP 180
|
CP 202
|
|
93
|
7
|
|
710-820
|
|
CuP 182
|
CP 201
|
|
92
|
8
|
|
710-770
|
|
CuP 386
|
CP 302
|
|
86.2
|
6,8
|
7
|
650-700
|
|
CuP 279
|
CP 105
|
2
|
91.5
|
6.5
|
|
645-825
|
|
CuP 280
|
-
|
2
|
91
|
7
|
|
645-790
|
|
CuP 281
|
CP 104
|
5
|
89
|
6
|
|
645-815
|
|
CuP 282
|
-
|
5
|
88
|
7
|
|
645-770
|
|
CuP 284
|
CP 102
|
15
|
80
|
5
|
|
645-800
|
|
CuP 286
|
CP 101
|
18
|
75
|
7
|
|
645
|