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OP 122
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EN 760
SA FB 1 65 AC H5
DIN 32 522
B FB 1 55 AC 10 MHP5
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Type/
Characteristics:
Agglomerated
fluoride-basic
type flux for
welding general
structural
steels, pressure
vessel and pipe
steels, as well
as fine grain
structural
steels.
As regards
silicon, AMA OP
122 will produce
a slight
pick-up, whereas
it is relatively
neutral as to
manganese, which
requires the use
of wire
electrodes
having higher
manganese
content, as for
instance 50-12,
50-15. AMA OP
122 is also
suitable to be
used for twin
wire, tandem and
multi wire
welding, as well
as for welding
from both sides
in one pass, as
is the case in
fabrication
large diameter
pipes. For
improved
toughness
values, it is
advisable to use
molybdenum
alloyed wire
electrodes. AMA
OP 122 exhibits
high current
carrying
capacity and is
therefore
suitable for
depositing large
fillet weld
sections. Slag
removal is
excellent.
Owning to its
low bulk
density,
consumption is
also low. On
account of its
special
production mode,
moisture pick-up
of the flux and
hydrogen content
of the weld
metal are low.
AMA OP 122 can
be used on
either DC
(positive) or AC
up to 1200 A.
Damp flux shall
be redried by
baking at
300-350 ˚C.
Grain size
according to DIN
32 522:2-20. |
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Main constituents:
|
SiO2+TiO2 |
CaO+MgO |
Al203 + MnO |
CaF2 |
|
|
%20 |
%30 |
%25 |
%20 |
|
Basicity to boniszewsk:
~1.7
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 |
|
|
|
50-12 |
0.04-0.08 |
0.1-0.2 |
0.8-1.2 |
- |
|
50-14 |
0.04-0.08 |
0.1-0.2 |
0.8-1.2 |
0.5 |
|
50-15 |
0.04-0.08 |
0.15-0.25 |
1.3-1.6 |
- |
Application:
|
Materials |
Multi-pass joint
welding |
Welding from both
sides in one pass |
|
|
General structural steels |
With wire electrode |
With wire electrode |
|
St37-2,Ust37-2,RSt37-2 |
50-12 |
50-12,50-14 |
|
St 37-3,St 44-2,St 44-3 |
50-12 |
50-12,50-14 |
|
St
52-3 |
50-12-50-15 |
50-12,50-14 |
|
Pipe steels |
With wire electrode |
With wire electrode |
|
StE 210.7, StE 240.7, StE
290.7 |
50-12 |
50-12,50-14 |
|
StE 320.7, StE 360.7,385.7 |
50-15 |
50-12,50-14 |
|
StE 415.7, StE 445.7,480.7 |
50-14 |
50-14 |
|
St 37 , St 37.4, St 35.8 |
50-12 |
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 |
|
X42 |
50-14 |
50-14 |
|
X46, X52,X56 |
50-14 |
50-14 |
|
X60, X65,X70 |
50-14 |
50-14 |
|
Boiler plates |
With wire electrode |
With wire electrode |
|
H I, H II |
50-12 |
50-12,50-14 |
|
17 Mn 4 |
50-12 |
50-12,50-14 |
|
19 Mn 5 |
50-12 |
50-12,50-14 |
|
17 Mo 3 |
50-12 |
50-14 |
|
Fine grain structural steels |
With wire electrode |
With wire electrode |
|
StE 255 , WStE 255 |
50-12 |
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 |
50-15 |
50-12,50-14 |
|
StE 420, WStE 420 |
50-14 |
50-14 |
|
TStE 255, TStE 285 |
50-15 |
- |
|
TStE 315, TStE 355 |
50-15 |
- |
|
TStE 380 |
50-15 |
- |
Welding from both sides
in one pass, especially
in multi wire welding,
50-14 Mo wire electrode
should be used
because of the fine
grain formation caused
by molybdenum.
Approval :
LRS,
NK ,GL
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