page10
Composition by weight %
Family
Solidus/liquidus
point (°C)
Toxic
Comments
Cu
Zn
Ag
Au
Pd
Pt
Ti
Cr
Mo
W
Mn
Fe
Co
Ni
Cd
Sn
Al
B
Si
P
other
Cu
57
Zn
38
Mn
2
Co
2
Cu–Zn
890/930
[68]
–
F Bronze. For brazing tungsten carbide to steels. Primarily used for rock drills or
when simultaneous heat treatment is required.
57
38
2
2
Cu
86
Zn
10
Co
4
Cu–Zn
960/1030
[69]
–
D Bronze. For brazing tungsten carbide to steels. Primarily used for rock drills or
when simultaneous heat treatment is required.
86
10
4
Cu
85
Sn
8
Ag
7
Ag–Cu
665/985
[37]
–
Braze 071. For vacuum systems. As a lower-temperature alternative to copper. For
brazing with following heat treatment.
85
7
8
Cu
85
Sn
15
Cu-Sn
789/960
[34]
–
Cutin.
85
15
Cu
60.85
Ag
36
Si
3
Sn
0.15
Ag–Cu
[5]
–
Developed as a replacement for Ag
72
Cu
28
eutectic, with half the silver content and
correspondingly lower material cost. Very similar mechanical and physical
properties and application temperature.
60.85
36
0.15
3
Cu
53
Zn
38
Ag
9
Ag–
Cu–Zn
765/850
[37]
Cd
Braze 090. For copper alloys, e.g. in band instruments. Also for brazing of steels
with simultaneous cyanide case hardening.
53
38
9
18
Cu
45
Zn
35
Ag
20
Ag–
Cu–Zn
710/815
[37]
713/816
[70]
–
Braze 202, Silvaloy A20. Has variety of applications but used rarely due to high
melting point. Close temperature match for heat treating carbon steel, allows
brazing and heat treating in a single step. Strength generally higher than of base
metals. Maximum service temperature 149 °C, intermittently 260 °C.
45
35
20
Cu
52.5
Zn
22.5
Ag
25
Ag–
Cu–Zn
675/855
[37]
677/857
[71]
–
Braze 250. For joining ferrous and non-ferrous alloys. Tends to liquate, rapid
heating preferred. Long melting range is advantageous for large gap joints. Special
use in jet engine compressors as bearing surface material on rubbing seals. Brass
yellow color.
52.5
22.5
25
Ag
72
Cu
28
Ag–Cu
780
[1][72]
–
AG 401, BrazeTec 7200. Eutectic. Good ductility, moderate temperature. Widely
used. Can be used for brazing metalized ceramics. Can be used for both flame and
furnace brazing, with protective atmosphere and vacuum. In vacuum silver may
evaporate above 900 °C.
28
72
Ag
60
Cu
30
Sn
10
Ag–Cu
600/730
[1]
600/720
[41][54]
602/718
[73]
–
AG 402, BAg-18, BVAg-18, AMS 4773, Braze 603, Braze 604 (VTG grade for
vacuum systems, with reduced volatile impurities), Cusilitin 10, BrazeTec 6009,
Silver Braze 60Sn10. For vacuum tube seals, for alloyed steels. Can braze some
ferrous and nonferrous alloys without flux. For marine heat exchangers (which
come in contact with sea water at elevated temperature, where zinc would tend to
leach). Some tendency to liquate. Tin content improves wetting of ferrous alloys.
Useful for seals on vacuum tube components and for fluxless brazing in controlled
atmosphere. White color. Can be used for both flame and furnace brazing, with
protective atmosphere and vacuum. In vacuum silver may evaporate above
900 °C.
30
60
10
Ag
56
Cu
27.25
In
14.5
Ni
2.25
Ag–Cu
600/710
[1]
–
AG 403, Ag56InNi. Suitable for brazing parts to be later coated with TiN.
27.25
56
2.25
In
14.5
Ag
64
Cu
26
In
6
Mn
2
Ni
2
Ag–Cu
730/780
–
Ag64MnNiIn. Suitable for brazing parts to be later coated with TiN.
26
64
2
2
In
6
Ag
55
Cu
30
Pd
10
Ni
5
Ag–Cu
827/871
[54]
–
Premabraze 550. For corrosion-resistant joints on stainless steel.
30
55
10
5
Ag
85
Mn
15
Ag
960/970
[1][46]
–
BAg-23, AMS 4766, AG 501, Braze 852, Silver Braze 85. For high-temperature
service where good strength is required. For complex chromium-titanium carbides,
stainless steel, Stellite, Inconel. For torch and furnace brazing. High melting point
advantageous for subsequent heat treatments. Used for carbide tools subjected to
high temperatures. White color. Can be used for infiltrating porous components
made by powder metallurgy ("infiltration brazing"); the lubricity of silver and its
resistance to galling makes it attractive for bearings. Can be strain-hardened by
mechanical cold working.
[74]
85
15
Ag
49
Cu
16
Zn
23
Mn
7.5
Ni
4.5
Ag–
Cu–Zn
680/705
[1]
–
AG 502
16
23
49
7.5
4.5
Ag
27
Cu
38
Zn
20
Mn
9.5
Ni
5.5
Ag–
Cu–Zn
680/830
[1]
–
AG 503
38
20
27
9.5
5.5
Ag
25
Cu
38
Zn
33
Mn
2
Ni
2
Ag–
Cu–Zn
710/815
[37]
–
BAg-26, Braze 252, Silver Braze 25. Economical. For tungsten carbide, stainless
steel, and steels.
38
33
25
2
2
Ag
90
Pd
10
Ag-Pd
1002/1065
[54]
1025/1070
[73]
–
Premabraze 901, Palsil 10. For stainless steels, nickel, molybdenum, tungsten,
and fast brazing cycles on titanium.
90
10
Ag
48.5
Pd
22.5
Cu
19
Ni
10
Ag-Pd
910/1179
–
Palnicusil. Economical. Ductile, for stainless steels. Wide gaps.
19
48.5
22.5
10
Ni
57.1
Pd
30
Cr
10.5
B
2.4
Pd–Ni
941/977
[73]
–
Palnicro 30. Better high-temperature creep resistance than BAu-4.
30
10.5
57.1
2.4
Ni
47
Pd
47
Si
6
Pd–Ni
810/851
[73]
–
Palnisi-47. Better high-temperature creep resistance than BAu-4.
47
47
6
Ni
50
Pd
36
Cr
10.5
B
3
Si
0.5
Pd–Ni
820/960
[73]
–
Palnicro-36-M. Better high-temperature creep resistance than BAu-4.
36
10.5
50
3
0.5
Cu
62.5
Au
37.5
Au–Cu
990/1015
[75]
991/1016
[54]
–
BAu-1, Premabraze 399. For copper, nickel, kovar, and molybdenum-manganese
metallized ceramics.
62.5
37.5
Au
80
Cu
20
Au–Cu
891
[75]
908/910
[73]
–
BAu-2, Gold Braze 8020. Eutectic. Loses ductility above 200 F.
[73]
20
80