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OP 41 TT
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EIN 760
SA FB 1 53 DC HP 5
DIN 32 522
B FB 1 53 DC 8
HP 5
|
Type/
Characteristics:
Agglomerated
fluoride-basic
type flux for
welding high
tensile fine
grain structural
steels and creep
resistant
steels. In
nuclear
engineering, AMA
OP 41 TT
combined with
different wire
electrodes, may
be used for a
great many
applications. It
is preferably
used for joining
components such
as reactor
pressure
vessels, steam
generators,
pressurizes,
reactor safety
shells and
piping of the
primary and
secondary
circuits, as
well as for
auxiliary
plants.
In combination
with 50-57 wire
electrodes, AMA
OP 41 TT was
successfully
COD-tested and
is therefore
commonly used in
the offshore
sector. As to
silicon, its
behavior is
neutral, i.e.
neither pick-up
nor burn-out
will occur.
However,
manganese will
burn out, so
that wire
electrodes
having higher
manganese and
silicon contents
(e.g. 50-57) should be
used. The flux
does not contain
metallic
components and
can therefore be
designated as a
pure
slag-forming
agent.
On account of
its special
production mode,
moisture pick-up
of the flux and
hydrogen content
of the weld
metal are low.
AMA OP 41 TT can
be used on
either DC
(positive) or AC
up to
approximately
800 A. Damp flux
shall be redried
by baking at
300-350 ˚C.
Grain size
according to DIN
32 522:2-20. |
|
Main constituents:
|
SiO2+TiO2 |
CaO+MgO |
Al203 + MnO |
CaF2 |
|
|
%10 |
%35 |
%20 |
%30 |
|
Basicity to boniszewsk:
~3.1
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 |
Ni |
|
|
|
50-57 |
0.05-0.08 |
0.2-0.3 |
1.2-1.5 |
- |
- |
- |
|
50-22 |
0.05-0.08 |
0.1-0.2 |
0.7-0.9 |
0.5 |
1.0 |
- |
|
50-14 |
0.04-0.08 |
0.1-0.2 |
0.7-0.9 |
0.5 |
- |
- |
|
50-23 |
0.05-0.08 |
0.1-0.2 |
0.4-0.6 |
1.0 |
2.2 |
- |
|
50-24 |
0.05-0.08 |
0.2-0.3 |
0.9-1.2 |
- |
- |
1.0 |
|
50-21 |
0.05-0.08 |
0.1-0.2 |
1.2-1.5 |
0.6 |
- |
1.0 |
|
50-25 |
0.05-0.08 |
0.1-0.2 |
0.7-0.9 |
- |
- |
2.0 |
Mechanical properties
of all-weld metal (typical
values) :
|
With Wire electrode |
Heat treatment |
Tensile Strength
(N/mm2) |
Yield Strength
(N/mm2) |
Elongation
Lo=5d(%) |
|
|
50-57 |
As - Welded |
530-630 |
>420 |
>24 |
|
|
50-14 |
As - Welded |
570-670 |
>490 |
>20 |
|
|
50-22 |
Tempered(1) |
530-630 |
>380 |
>24 |
|
|
50-22 |
norm+Temp(2) |
430-530 |
>310 |
>30 |
|
|
50-23 |
Tempered(3) |
550-650 |
>450 |
>22 |
|
|
50-23 |
norm+Temp(4) |
520-620 |
>400 |
>22 |
|
|
50-24 |
As - Welded |
500-600 |
>420 |
>24 |
|
|
50-24 |
stress relived |
480-580 |
>480 |
>26 |
|
|
50-21 |
As - Welded |
630-720 |
>540 |
>20 |
|
|
50-21 |
stress relived |
610-700 |
>540 |
>22 |
|
|
50-25 |
As - Welded |
550-650 |
>450 |
>24 |
|
|
50-25 |
stress relived |
500-600 |
>430 |
>26 |
|
|
Heat treatment
ISO-V Impact
energy (j)
|
|
|
|
+20 |
±0 |
-20 |
-40 |
-600C |
|
|
|
50-57 |
As - Welded |
>170 |
>150 |
>120 |
>70 |
>40 |
|
50-14 |
As - Welded |
>140 |
>120 |
>100 |
>70 |
>50 |
|
50-22 |
Tempered(1) |
>200 |
>150 |
- |
- |
- |
|
50-22 |
norm+Temp(2) |
>200 |
>200 |
- |
- |
- |
|
50-23 |
Tempered(3) |
>140 |
>100 |
- |
- |
- |
|
50-23 |
norm+Temp(4) |
>140 |
>90 |
- |
- |
- |
|
50-24 |
As - Welded |
>150 |
>130 |
>100 |
>70 |
>50 |
|
50-24 |
stress relived |
>170 |
>140 |
>110 |
>90 |
>70 |
|
50-21 |
As - Welded |
>150 |
>120 |
>90 |
>70 |
>50 |
|
50-21 |
stress relived |
>160 |
>140 |
>120 |
>90 |
>70 |
|
50-25 |
As - Welded |
>160 |
>140 |
>120 |
>80 |
>50 |
|
50-25 |
stress relived |
>180 |
>170 |
>150 |
>110 |
>80 |
1) tempered :
700-720C
2) norm + temp :
920C/air+700-720C
3) tempered :
730-750C
4) norm + temp :
940C/air+730-750C
Application:
|
Materials |
Multipass joint
welding |
|
|
Fine grain structural steels |
With wire electrode |
|
StE 255 , WStE 255, TSt
255, EStE 255 |
50-57, 50-24 |
|
StE 285 , WStE 285, TSt
285, EStE 285 |
50-57, 50-24 |
|
StE315 , WStE 315, TSt
315, EStE 315 |
50-57, 50-24 |
|
StE355 , WStE 355, TSt
355, EStE 355 |
50-57, 50-24 |
|
StE380 , WStE 380, TSt
380, EStE 380 |
50-57, 50-24 |
|
StE420 , WStE 420, TSt
420, EStE 420 |
50-57, 50-24 |
|
StE460 , WStE 460, TSt 460,
EStE 460 |
50-21 |
|
StE500 , WStE 500, TSt 500,
EStE 500 |
50-21(1) |
|
Reactor steels |
With wire electrode |
|
20 Mn Mo Ni55 |
50-21 |
|
22 Ni Mo Cr37 |
50-21 |
|
15 Ni Cu Mo Nb5 |
50-21 |
|
15 Mn Ni63 |
50-24 |
|
Creep resistant steels |
With wire electrode |
|
13 Cr Mo 44 |
50-22 |
|
10 Cr Mo9 10 |
50-23 |
|
Cryogenic steels |
With wire electrode |
|
10 Ni 14 |
50-25 |
|
TTSt 35 N, TTSt 35 V |
50-25 |
|
TTSt 41 N, TTSt 41 V |
50-25 |
1) Also for
stress-relived condition
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