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Copper Brazing Alloys

Brazing of steel, stainless steel, nickel and copper/nickel alloys

 

Resistance against corrosion along with ductility makes copper brazing alloys attractive for many applications. These alloys perform well in electrical and thermal conduction applications as well.

 

Copper brazing allows with higher purities can be brazed under vacuum or in air. Phosphorous-copper brazing alloys behave like flux and can be used to reduce copper.

 

Brazing with zinc-copper alloys leads to high strength. These alloys are brazed under high heat; therefore, you should try to avoid overheating to prevent voids from being left in the joint.

Product Composition ISO / UNS/AWS Solidus [°C] Liquidus [°C]
         
CDA 101 99.99Cu – / – 1083 1083
BVCu-1x
BCu-1 99.9Cu0.1P Cu 141 / C11000 1083 1083
BCu-1
Copperhead 124 99Cu Cu 099 / – 1083 1083
BCU-1a
BCu-2 86.5Cu Cu 087 / – 1083 1083
BCu-2
CDA 102 99.95Cu Cu 102 / C10200 1083 1083
BCu-3
CDA 110 99.9Cu Cu 110 / C14180 1083 1083
BCu-1b
CDA 521 91.7Cu8Sn0.3P – / – 882 1027
RCuSn-C
CuSn12 87.8Cu12Sn0.2P Cu 925 / C92501 825 990
  87.75Cu12Ge0.25Ni   880 975
CB 235 67.5Cu23.5Mn9Ni   925 955
CDA 773 48Cu41.25Zn10Ni0.5Si0.25P Cu 773 / C77300 921 935
RBCuZn-D
CB 380 52.5Cu38Mn9.5Ni   880 925
X-55 (CDA 548) 55Cu34.85Zn6Ni   880 920
  4Mn0.15Si      
CB 120 54.85Cu25Zn8Ni12Mn0.15Si   855 915
CDA 470 59Cu40.4Zn0.6Sn Cu 470 / C47000 888 899
RBCuZn-A
CDA 681 58Cu40Zn0.8Fe1Sn0.2Mn Cu 471 / C47100 866 888
RBCuZn-C
CDA 680 58Cu39.4Zn0.8Fe1Sn0.5Ni0 2Mn0.1Si Cu 681 / 68100 866 882
RBCuZn-B
Silver Phos 5 89Cu6P5Ag CuP 281 / C55281 643 813
BCuP-3
Silver Phos 6 88Cu6P6Ag   643 807
Silver Phos 15 80Cu15Ag5P CuP 284 / C55284 643 802
BCuP-5
Phos Copper 0 92.75Cu7.25P CuP 181 / C55181 710 793
BCuP-2
Silver Phos 2 91Cu7P2Ag CuP 280 / C55280 643 788
BCuP-6
Silver Phos 5HP 88.25Cu6.75P5Ag CuP 282 / C55282 643 771
BCuP-7
Silver Phos 6HP 86.75Cu7.25P6Ag CuP 283 / C55283 643 718
BCuP-4
Silver Phos 2LP 91.5Cu6.5P2Ag   643 704
Tin Phos 7 86.8Cu6.5P6.5Sn0.2Si CuP 385 / C55385 637 675
BCuP-9
Silver Phos 18 76.05Cu17.6Ag6.35P CuP 285 / C55385 643 666
BCuP-8
Silver Phos 18M 75.75Cu18Ag6.25P   643 665