page9
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
Ag
50
Cu
15.5
Zn
16.5
Cd
18
Ag–
Cu–Zn
625/635
[61][62]
Cd
BAg-1a, AMS 4770, Easy-Flo, Easy-Flo 50, Silvaloy 50, Mattibraze 50, Silver
Alloy 50. Near-eutectic. Same applications as BAg-1. Suitable for most metals,
e.g. steel, stainless steel, copper, nickel and their alloys. Unsuitable for aluminium
and magnesium. For ferrous, nonferrous and dissimilar alloys. Narrow melting
range, no liquation. High fluidity, for close joint clearances. Very free-flowing, used
where minimum brazing temperatures are required. When brazing cast iron,
graphite must be removed from the surface to assure good wetting. May facilitate
stress cracking of some alloys by liquid metal embrittlement; prior stress relief
annealing is required then, or use of a higher melting point alloy that does not melt
until stress relief temperature of the base metal is reached. Light yellow color.
Maximum service temperature 204 °C (intermittently 316 °C).
15.5
16.5
50
18
Ag
30
Cu
27
Zn
23
Cd
20
Ag–
Cu–Zn
605/710
[61]
608/710
[63]
605/745
[64]
Cd
BAg-2a, Easy-Flo 30, Silvaloy 30, Mattibraze 30, Silver Alloy 30. Similar to BAg-
2, more economical. For ferrous, nonferrous and dissimilar alloys. For larger gaps,
where fillets are desired. For steel, stainless steel, copper, copper alloys, nickel,
nickel alloys, and combinations. For larger gaps, where fillets are desired and
clearances are not uniform. Light yellow color. Maximum service temperature 204
°C, intermittently 316 °C.
27
23
30
20
Ag
25
Cu
35
Zn
26.5
Cd
13.5
Ag–
Cu–Zn
605/745
[61]
Cd
BAg-27, Easy-Flo 25, Silvaloy 25. Similar to BAg-2a, more economical due to
lower silver content; higher melting point and melting range results. For steel,
stainless steel, copper, copper alloys, nickel, nickel alloys, and combinations. Melts
through mushy state. For larger gaps, where fillets are desired and clearances are
not uniform. Light yellow color. Maximum service temperature 204 °C, intermittently
316 °C.
35
26.5
25
13.5
Ag
25
Cu
40
Zn
33
Sn
2
Ag–
Cu–Zn
685/771
[65]
–
BAg-37, Silvaloy A25T, Silver Braze 25Sn2. Similar to BAg-28, more economical
due to lower silver content; less-active flow, higher melting point, higher melting
range. For ferrous and nonferrous alloys. For joints not requiring ductility and
impact strength. Not ductile during cooling, must be allowed to cool without
mechanical and thermal shocks.
40
33
25
2
Ag
42
Cu
17
Zn
16
Cd
25
Ag–
Cu–Zn
610/620
[1]
Cd
AG 303
17
16
42
25
Ag
40
Cu
19
Zn
21
Cd
20
Ag–
Cu–Zn
595/630
[1]
Cd
AG 304
19
21
40
20
Ag
35
Cu
26
Zn
21
Cd
18
Ag–
Cu–Zn
610/700
[1]
605/700
[61]
607/701
[66]
Cd
BAg-2, AMS 4768, AG 305, Easy-Flo 35, Silvaloy 35, Mattibraze 35, Silver
Alloy 35. Similar to BAg-1, more economical. For ferrous, nonferrous and
dissimilar alloys. Free-flowing, for larger gaps, where fillets are desired. For steel,
stainless steel, copper, copper alloys, nickel, nickel alloys, and combinations. Light
yellow color. Maximum service temperature 204 °C, intermittently 316 °C.
26
21
35
18
Ag
30
Cu
28
Zn
21
Cd
21
Ag–
Cu–Zn
600/690
[1]
Cd
AG 306
28
21
30
21
Ag
25
Cu
30
Zn
27.5
Cd
17.5
Ag–
Cu–Zn
605/720
[1]
640/715
[61]
Cd
BAg-33, AG 307, Easy-Flo 25HC. Similar to BAg-2a, more economical. For
ferrous, nonferrous and dissimilar alloys. For larger gaps, where fillets are desired.
30
27.5
25
17.5
Ag
21
Cu
35.5
Zn
26.5
Cd
16.5
Si
0.5
Ag–
Cu–Zn
610/750
[1]
Cd
AG 308
35.5
26.5
21
16.5
0.5
Ag
20
Cu
40
Zn
25
Cd
15
Ag–
Cu–Zn
605/765
[1]
Cd
AG 309
40
25
20
15
Ag
50
Cu
15.5
Zn
15.5
Cd
16
Ni
3
Ag–
Cu–Zn
635/655
[1]
630/690
[61]
632/688
[67]
Cd
BAg-3, AMS 4771, AG 351, Easy-Flo 3, Silvaloy 50N, Mattibraze 50N, Silver
Alloy 50Ni3. For 300-series stainless steel. For joining tungsten carbide, beryllium
copper and aluminium bronze to steel. Introduced as a replacement of BAg-1a due
to its increased corrosion resistance in certain conditions. Resistant to chloride
corrosion. Used in marine applications. Used in dairy equipment exposed to strong
chlorine-based cleaning solutions. Used extensively for brazing tungsten carbide
tips on woodcutting, metal cutting and mining tools. Recommended for aluminium
bronze as the nickel content offsets the detrimental effect of aluminium diffusion.
Mushy during melting, most volume melts at the higher end of melting range. Can
be used to shape fillets and to bridge large gaps. Fillets may be used for bridging
large gaps or for distributing stresses in the assembly. Tendency to liquation. Light
yellow color. Maximum service temperature 204 °C (intermittently 316 °C). Gap
0.1–0.25 mm. Cadmium-free alternative is BAg-24.
15.5
15.5
50
3
16
Ag
44
Cu
27
Zn
13
Cd
15
P
1
Ag–
Cu–Zn
595/660
[61]
Cd
Braze 440. For electrical contacts and copper-tungsten electrodes. Low-melting
filler.
27
13
44
15
1
Cd
95
Ag
5
Cd-Ag
340/395
[61]
Cd
Braze 053, Braze 53. A high-temperature solder. For medium-strength joints. Can
join copper, brass and steel. Used where joint strength needs to be higher than
achievable by solders and temperature must be low, e.g. thermostatic bellows
operating at temperatures too high for soft solders and requiring being joined below
their annealing temperature. Large use on small electric motors, where soft
soldering would fail on overheating. Used for soldering gun parts instead of soft
solders due to high resistance to alkali solutions used for blacking, and due to
higher strength at high temperatures. Gray color.
5
95
Cu
58
Zn
37
Ag
5
Ag–
Cu–Zn
840/880
[37]
–
Braze 051. For nichrome resistance elements; the brazing temperature allows
simultaneous stress relief annealing which prevents intergranular cracking. For
brazing and simultaneous heat treatment of steels. For various ferrous and
nonferrous alloys. Zinc content and high temperature required causes rapid
alloying with nonferrous metals, so the duration of contact with liquid alloy with
base metals should be limited. In furnace brazing the heat cycles should be kept
short, as otherwise zinc could volatilize and leave pinholes in the alloy. Brass
yellow color.
58
37
5