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OP 123
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EIN 760
SA AB 1
67AC
DIN 32 522
BAB 1 67 AC 10 M
Application / Properties:
Agglomerated aluminate-rutile
type flux for welding
general structural
steels, pressure vessel
and pipe steels, as well
as fine grain structural
steels . AMA
OP123 produces a
slight silicon
and mean manganese
pick-up. Owing to its
metallurgical behaviour,
It can be used with
50-11, 50-12, 50-14 wire
electrodes. It is suited
to be used in twin-wire
and multi-wire
welding, as well as in
welding from both sides
in one pass, e.g. In the
production of large
diameter pipes. With
this process variant,
the use of molybdenum
alloyed wire electrodes
for increased toughness
values is advisable. An
outstanding feature of
AMA OP 123 flux is its
high current carrying
capacity. Unless there
are limitation imposed
by base metal quality,
this feature of the flux
can be of benefit when
slag can be easily
removed in all cases,
the slag being short,
i.e. girth seams of
small diameter work
pieces can be welded
without the danger of
the slag running off. On
account of its low bulk
density, flux
consumption is low.
AMA OP 123 can be
used on either DC
(positive) or AC up to
1000A.
Damp flux shall be
redried by baking at
300-350C
Grain size in according
with DIN 32 522:2-20*.
Main constituents:
|
SiO2+TiO2 |
CaO+MgO |
Al203 + MnO |
CaF2 |
|
|
%20 |
%20 |
%45 |
%10 |
|
Basicity to boniszewsk:
~1.0
Metallurgical behavior:
Pick-up and burn-off
the alloying elements Si
and Mn as a function of
the alloy content
of the wire electrode,
DVS Merkblatt 0907, part
1
All-Weld metal
analysis (typical
values):
|
With
Wire electrode
Weight-% |
|
|
|
C |
Si |
Mn |
Mo |
|
|
50-11 |
0.05-0.08 |
0.2-0.4 |
0.7-1.1 |
- |
|
50-12 |
0.05-0.08 |
0.2-0.4 |
1.2-1.6 |
- |
|
50-14 |
0.05-0.08 |
0.2-0.4 |
1.2-1.6 |
0.5 |
Mechanical properties
of all-weld metal (typical
values) :
|
With Wire electrode |
Heat treatment |
Yield Strength
(N/mm2) |
Tensile Strength
(N/mm2) |
Elongation
Lo=5d(%) |
ISO-V Impact
energy (j)
+200C
±00C -200C |
|
|
50-11 |
As - Welded |
>360 |
420-520 |
>24 |
>90
>50
>35 |
|
|
50-12 |
As - Welded |
>400 |
500-600 |
>22 |
>90
>50
>35 |
|
|
50-14 |
As - Welded |
>450 |
600-700 |
>18 |
>65
>50
>35 |
|
Application:
|
Materials |
Multipass joint
welding |
Welding from both
sides in one pass &
Fillet welding |
|
|
General structural steels |
With wire electrode |
With wire electrode |
|
StE37-2,Ust37-2,RSt37-2 |
50-11 |
50-12,50-14 |
|
St 44-2,St 44-3,St 44-3,St
52-3 |
50-12 |
50-12,50-14 |
|
Pipe steels |
With wire electrode |
With wire electrode |
|
StE 210.7, StE 240.7 |
50-11 |
50-12,50-14 |
|
StE 290.7,StE 320.7, StE 360.7 |
50-12 |
50-12,50-14 |
|
St 37, St 37.4, St 35.8 |
50-11 |
50-12,50-14 |
|
St 44 , St 44.4, St 45.8 |
50-12 |
50-12,50-14 |
|
St 52, St 52.4 |
50-12 |
50-12,50-14 |
|
X 42 |
50-11 |
50-12,50-14 |
|
X 46, X 52, X 56 |
50-12 |
50-12,50-14 |
|
X60, X65, X70 |
50-14 |
50-12,50-14 |
|
Boiler plates |
With wire electrode |
With wire electrode |
|
H I, H II |
50-11 |
50-12,50-14 |
|
17 Mn 4, 19 Mn 5 |
50-12 |
50-12,50-14 |
|
Fine grain structural steels |
With wire electrode |
With wire electrode |
|
StE 255 , WStE 255 |
50-11 |
50-12,50-14 |
|
StE 285, WStE 285 |
50-12 |
50-12,50-14 |
|
StE 315, WStE 315 |
50-12 |
50-12,50-14 |
|
StE 355, WStE 355 |
50-12 |
50-12,50-14 |
|
StE 380, WStE
380 |
50-12 |
50-12,50-14 |
|
StE 420, WStE 420 |
50-14 |
50-12,50-14 |
For welding from both
side in one pass,
especially in multi-wire
welding
50-14 wire electrode
should be used
because of the
fine-grain formation
caused by molybdenum.
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