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OP 181
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EN 760
S A AR 1 88 AC
DIN 32 522
B AR 1 88 AC 10 SKM
Application / Properties:
Agglomerated
aluminate-rutile type
flux for welding general
structural steels,
pressure vessel and pipe
steels, as well as fine
grain structural steels
having o yield strength
of up to 355 N/mm2. AMA
OP 181 produces a high
silicon and manganese
pick up and can
therefore be used with
50-11, 50-12,
electrodes wires.
It is particularly
suited for high-speed
welding applying the
twin-wire process as
well as in tandem and
multi-wire welding.
Owing to its
metallurgical behavior
AMA OP 181 can be
preferably used for
welding from both sides
in one pass, e.g. in
longitudinal welding of
large-diameter pipes and
thin-walled spiral
pipes.
A further field of
application is the
welding of tube-web-tube
points or finned tubes.
On account of easy slag
removal, AMA OP 181
preferably used in
filled welding. It can
be used on either DC or
AC up to 1000A.
Damp flux shall be
redried by baking at
300-350C
Grain size in according
with DIN 32 522:2-16.
Main constituents:
|
SiO2+TiO2 |
Al203 + MnO |
CaF2 |
|
|
%30 |
%50 |
%10 |
|
Basicity to boniszewsk:
~0.4
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 |
0.03-0.08 |
0.6-0.9 |
1.1-1.5 |
- |
|
50-12 |
0.04-0.08 |
0.6-0.9 |
1.3-1.7 |
- |
|
50-14 |
0.04-0.08 |
0.6-0.9 |
1.3-1.7 |
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 |
|
|
50-11 |
As - Welded |
>420 |
520-620 |
>22 |
>50 |
|
|
50-12 |
As - Welded |
>450 |
560-660 |
>22 |
>50 |
|
|
50-14 |
As - Welded |
>490 |
610-710 |
>18 |
>50 |
|
Application:
|
Materials |
Multipass joint
welding |
Welding from both
sides in one pass |
|
|
General structural steels |
With wire electrode |
With wire electrode |
|
StE37-2,Ust37-2,RSt37-2 |
50-11,50-12 |
50-12 |
|
St 44-2,St 44-3 |
50-11,50-12 |
50-12 |
|
St
52-3** |
50-12 |
50-12 |
|
Pipe steels |
With wire electrode |
With wire electrode |
|
StE 210.7, StE 240.7, StE
290.7 |
50-11 |
50-12 |
|
StE 320.7, StE 360.7 |
50-12 |
50-12 |
|
St 37, St 37.4, St 35.8 |
50-11 |
50-12 |
|
St 44 , St 44.4, St 45.8 |
50-11 |
50-12 |
|
St 52, St 52.4 |
50-12 |
50-12 |
|
Boiler plates |
With wire electrode |
With wire electrode |
|
H I, H II |
50-11,50-12 |
50-11,50-12 |
|
17 Mn 4, 19 Mn 5 |
50-12 |
50-11,50-12 |
|
15 Mo3 |
50-14 |
50-14 |
|
13 Cr Mo44* |
50-22 |
50-22 |
|
Fine grain structural steels |
With wire electrode |
With wire electrode |
|
StE 255, WStE 355** |
50-11,50-12 |
50-12 |
* Only for fillet welds
or tube-web-tube welding
on finned tubes.
** At service
temperatures down to +
0°C
|
