Metglas®Brazing
Foil & Preforms
The advent of Metglas®
Brazing Foil (MBF) from Metglas, Inc.
enables cost-effective, reject-free
production of stronger and more efficient
corrosion resistant heat exchangers.
This unique form of amorphous nickel-based
brazing filler metal can substitute
for previously used copper foil to braze
stainless steel base metal. High strength
and outstanding corrosion resistance
of brazed joints are achieved when using
Metglas® foils.
MBF
Alloy
AWS & AMS
Classifications
Nominal Composition,
wt. %
Cr
Fe
Si
C*
B
P
W
Co
Ni
15
13.0
4.2
4.5
0.03
2.8
-
-
1.0*
Bal
20
AWS
BNi2/AMS 4777
7.0
3.0
4.5
0.06
3.2
-
-
-
Bal
30
AWS
BNi3/AMS 4778
-
-
4.5
0.06
3.2
-
-
-
Ba
50
AWS
BNi-5a
19.0
-
7.3
0.08
1.5
-
-
-
Bal
51
AWS
BNi-5b
15.0
7.25
0.06
1.4
-
-
Bal
55
5.3
-
7.3
0.08
1.4
-
-
-
Bal
60
AWS
BNi6
-
-
-
0.10
-
11.0
-
Bal
80
15.2
-
-
0.06
4.0
-
-
-
Bal
Foils
are available with more
rigid dimensional tolerances
as specialty or "A"
grades
* Maximum concentration
-