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OP 139
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EIN 760
SA AB 167 AC H5
DIN 32 522
BAB 1 67 AC 12 MHP5
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Type/
Characteristics:
Agglomerated
aluminate-basic
type flux for
welding of mid
and medium
tensile steels.
AMA OP 139
produces a
slight silicon
and manganese
pick-up. Owning
to its
metallurgical
behavior, it can
be used with AMA
50-14 Mo and AMA
50-18 wire
electrodes. It
is suitable to
be used in high
speeds welding
with single or
multi wire and
tandem welding
systems. The
flux has a high
current carrying
capacity and as
such is suitable
for fillet and
butt welding
applications
especially for
welds in heavy
section steel
work. The weld
bead is of
uniform profile
with smooth weld
bead profile and
good blending at
the weld toes
even at high
welding speeds.
The slag
detachment is
good and in most
cases is
self-lifting AMA
OP 139 is used
with a range of
low alloy wires
including AMA
50-14, AMA 50-57 for
the seam welding
of pipes were
low temperature
impact toughness
properties are
required.
AMA OP 139 can
be used on
either DC
(positive) or AC
up to
approximately
1300 A.
Damp flux shall
be redried by
baking at
300-350 ˚C.
Grain size
according to DIN
32 522:3-18.
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Main constituents:
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SiO2+TiO2 |
CaO+MgO |
Al203 + MnO |
CaF2 |
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%20 |
%25 |
%35 |
%15 |
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Basicity to boniszewsk:
~1.5
All-Weld metal
analysis (typical
values):
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Weight-% |
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With
Wire electrode |
C |
Si |
Mn |
Mo |
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50-12 |
0.06 |
0.20 |
1.3 |
- |
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50-14 |
0.06 |
0.3 |
1.3 |
0.45 |
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50-18 |
0.06 |
0.30 |
1.8 |
- |
Mechanical properties
of all-weld metal (typical
values) :
|
With Wire electrode |
Yield Strength
(N/mm2) |
Tensile Strength
(N/mm2) |
Elongation
Lo=5d(%) |
ISO-V Impact
energy (j)
-200C -400C -600C |
|
|
50-12 |
470 |
390 |
31 |
120 60
-
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50-14 |
585 |
500 |
25 |
100
50
-
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50-18 |
580 |
480 |
26 |
105
60 40
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