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Copper Alloys

Aimtek
Alloy#
Industry Specifications Nominal Composition
(Percent %)
Solidus
(Melting Point)
Liquidus
(Flow Point)
Common Applications


Cu Ag P Zn Ni Others °F °C °F °C
CU180 AWS A5.8 BCu-1 99.9




1981 1083 1981 1083 General purpose steel, furnace brazing
CU740 AWS A5.8 BCu-1a
AMS4740
AMS3430
99




1981 1083 1981 1083 Pure Copper powder and paste applications
CU110 AWS A5.8 BCu-1b
CDA110 (ETP)
99.9




1981 1083 1981 1083 Electrolytic tough pitch alloy for general purpose steel brazing
CU181 AWS A5.8 BVCu-1x 99.99




1981 1083 1981 1083 High purity, Oxygen-free, Steel, Iron-based materials, Vacuum Brazing
CU865 AWS A5.8 BCu-2 86.5




1981 1083 1981 1083 Low purity Copper filler
CU701 AWS A5.8 BCu-3
AMS4701
CDA102 (OFHC)
MSRR9500/100
99.95




1981 1083 1981 1083 High purity, Oxygen-free, Steel, Iron-based materials, Vacuum Brazing
S0 AWS A5.8 BCuP-2 92.75
7.25


1310 710 1460 793 General purpose, Silver-free, Copper, Brass, and Bronze
S5 AWS A5.8 BCuP-3 89 5 6


1190 643 1495 813 Large Copper pipe, wider gaps
S6 AWS A5.8 BCuP-4 86.75 6 7.25


1190 643 1325 718 Close fit-up, low melting range
S15 AWS A5.8 BCuP-5
QQ-B-654A Grade 3 (III)
80 15 5


1190 643 1475 802 Wide gaps, ductile joints, wide availability of forms
S2 AWS A5.8 BCuP-6 91 2 7


1190 643 1450 788 General purpose, Copper, Brass, and Bronze
S18M AWS A5.8 BCuP-8 76 17.6 6.35


1190 643 1190 643 Close gaps, automated brazing, eutectic alloy
NVBR AWS A5.8
RBCuZn-A
59

40.4
0.63 Sn
-18
-18 Commonly referred to as Naval Bronze
NIBR AWS A5.8
RBCuZn-B
58

39.5 0.5 0.95 Sn, 0.73 Fe, 0.25 Mn, 0.12 Si
-18
-18 Commonly referred to as Nickel Bronze
LFB AWS A5.8
RBCuZn-C
58

40
0.95 Sn, 0.73 Fe, 0.25 Mn, 0.1 Si 1595 868 1620 882 Low fuming Bronze, General purpose Ferrous and Non-Ferrous
NIAG AWS A5.8 RBCuZn-D 48

41.9 10 0.15 Si 1665 907 1680 916 Commonly referred to as Nickel Silver, for Steel to Carbide brazing
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