UNIVERSAL
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EIN 760
SA AR 1 97 AC
DIN 32 522
B AR 1 97 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 a yield
strength of up to
355N/mm2 AMA
UNIVERSAL produces a
relatively high silicon
pick-up. When using
50-11,50-12 wire
electrodes, also a
manganese is
suited at approximately
1.3%. The flux can
therefore be used with
low manganese wire
electrodes. AMA
UNIVERSAL is
particularly suited for
twin-wire, tandem and
multi-wire welding at
higher speeds and
advantageous in welding
from both sides in one
pass, e.g. thin-walled
spiral pipes. For
increased weld metal
toughness, molybdenum
alloyed wire electrodes
(50-14) should be used
with AMA-UNIVERSAL flux.
It is especially suited
for welding
tube-web-tube joints or
finned tubes.
Owing easy slag removal,
It is also well suited
for filled welding. The
weld metal produced is
relatively
insensitive to porosity
when welding on plates
contaminated by rust,
scale etc. AMA UNIVERSAL
can be used on either DC
(positive) or AC up to
approximately 900 A (in
single wire welding).
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 |
%55 |
%5 |
|
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 |
Cr |
|
|
50-11 |
0.04-0.08 |
0.5-0.8 |
0.9-1.3 |
- |
- |
|
50-12 |
0.04-0.08 |
0.5-0.8 |
1.2-1.6 |
- |
- |
|
50-14 |
0.04-0.08 |
0.5-0.8 |
1.2-1.6 |
0.5 |
- |
|
50-22 |
0.04-0.08 |
0.5-0.8 |
1.2-1.6 |
0.5 |
1 |
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 |
>360 |
450-550 |
>22 |
>60 |
|
|
50-12 |
As - Welded |
>400 |
500-600 |
>22 |
>50 |
|
|
50-14 |
As - Welded |
>450 |
580-680 |
>18 |
>50 |
|
Mechanical properties
of Welded joints (typical
values) :
13 Cr Mo 44, 10 mm
Welded From both sides
in one pass.
|
With Wire electrode |
Heat treatment |
Yield Strength
(N/mm2) |
Tensile Strength
(N/mm2) |
ISO-V Impact
energy (j)
+200C |
|
|
50-22 |
As - Welded |
>300 |
>440 |
>40 |
|
|
50-22 |
Stress relived** |
>300 |
>440 |
>50 |
|
*
Transverse flat tensile
specimen
** Stress relived 15
hrs/700C
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 |
50-11,50-12 |
|
St 44-2,St 44-3St.
52-3** |
50-11 |
50-11,50-12 |
|
Pipe steels |
With wire electrode |
With wire electrode |
|
StE 210.7, StE 240.7, StE
290.7** |
50-11 |
50-11,50-12 |
|
StE 320.7, StE 360.7** |
50-12 |
50-11,50-12 |
|
St 37, St 37.4, St 35.8 |
50-11 |
50-11,50-12 |
|
St 44 , St 44.4, St 45.8 |
50-11 |
50-11,50-12 |
|
St 52, St 52.4* |
50-11,50-12 |
50-11,50-12 |
|
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 |
* Only for fillet welds
or tube-web-tube welding
on finned tubes.
** At service
temperatures down to +
20°C
