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OP 121 TT
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EN 760
SA FB 1 55 AC H5
DIN 32 522
B FB 1 55 AC 10 MHP5
|
Type/
Characteristics:
Agglomerated
fluoride-basic
type flux,
preferably used
for high
strength fine
grain structural
steels, as well
as cryogenic
steels and
steels resistant
to ageing.
Owning its
neutral behavior
as regards
pick-up and
burn-out of
silicon and
manganese, wire
electrodes
having higher
percentages of
Si and Mn (e.g.
50-27, 50-57)
should be used.
AMA OP 121 TT is
particularly
suited for
tandem and
multi-wire
welding. On the
strength of COD
tests made with,
50-57 wire
electrodes, this
flux is suitable
to be employed
for welding
offshore
components. The
weld metal
produced in
combination with
corresponding
wire electrodes,
meets high
toughness
requirements at
cryogenic
temperatures.
AMA OP 121 TT
Produces a short
slag, i.e. girth
seams of
components
having a small
diameter can be
welded without
the danger of
the slag running
off. It produces
uniform welds
without
undercut.
AMA OP 121 TT
can be used on
either DC
(positive) or AC
up to
approximately
1000 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 |
|
|
%15 |
%40 |
%20 |
%25 |
|
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 |
|
|
|
50-12 |
0.05-0.08 |
0.15-0.25 |
0.7-1.0 |
- |
- |
- |
|
50-15 |
0.05-0.08 |
0.15-0.25 |
1.0-1.4 |
- |
- |
- |
|
50-57 |
0.05-0.08 |
0.20-0.40 |
1.4-1.9 |
- |
- |
- |
|
50-14 |
0.05-0.08 |
0.15-0.25 |
0.7-1.0 |
0.5 |
- |
- |
|
50-17 |
0.05-0.08 |
0.15-0.25 |
1.0-1.4 |
0.5 |
- |
- |
|
50-22 |
0.05-0.08 |
0.20-0.30 |
0.7-1.0 |
0.5 |
1.0 |
- |
|
50-23 |
0.05-0.08 |
0.20-0.30 |
0.5-0.8 |
1.0 |
2.2 |
- |
|
50-24 |
0.05-0.08 |
0.25-0.40 |
1.0-1.3 |
- |
- |
1.0 |
|
50-25 |
0.05-0.08 |
0.20-0.30 |
0.7-1.0 |
- |
- |
2.0 |
|
50-21 |
0.05-0.08 |
0.20-0.40 |
1.3-1.6 |
0.6 |
- |
1.0 |
Mechanical properties
of all-weld metal (typical
values) :
|
With Wire electrode |
Heat treatment |
Tensile Strength
(N/mm2) |
Yield Strength
(N/mm2) |
Elongation
Lo=5d(%) |
|
|
50-12 |
As - Welded |
450-550 |
>360 |
>28 |
|
|
50-15 |
As - Welded |
530-630 |
>430 |
>25 |
|
|
50-57 |
As - Welded |
540-640 |
>450 |
>24 |
|
|
50-14 |
As - Welded |
580-680 |
>500 |
>20 |
|
|
50-17 |
Tempered(1) |
600-700 |
>530 |
>18 |
|
|
50-22 |
Tempered(1) |
550-630 |
>380 |
>24 |
|
|
50-22 |
norm+Temp(2) |
450-530 |
>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 |
>380 |
>26 |
|
|
50-25 |
As - Welded |
550-650 |
>450 |
>24 |
|
|
50-25 |
stress relived |
500-600 |
>430 |
>26 |
|
|
50-21 |
As - Welded |
650-750 |
>540 |
>20 |
|
|
50-21 |
stress relived |
630-730 |
>540 |
>22 |
|
|
Heat treatment
ISO-V Impact
energy (j)
|
|
|
|
+20 |
-+0 |
-20 |
-40 |
-60 |
-800C |
|
|
|
50-12 |
As - Welded |
>180 |
>160 |
>100 |
- |
- |
- |
|
50-15 |
As - Welded |
>180 |
>160 |
>100 |
>35 |
- |
- |
|
50-57 |
As - Welded |
>200 |
>180 |
>140 |
>100 |
>70 |
- |
|
50-14 |
As - Welded |
>140 |
>120 |
>100 |
>70 |
>50 |
- |
|
50-17 |
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 |
- |
|
50-25 |
As - Welded |
>160 |
>140 |
>120 |
>100 |
>70 |
- |
|
50-25 |
stress relived |
>180 |
>160 |
>140 |
>120 |
>90 |
>50 |
|
50-21 |
As - Welded |
>150 |
>120 |
>90 |
>70 |
>50 |
>70 |
|
50-21 |
stress relived |
>160 |
>140 |
>120 |
>90 |
>70 |
- |
1) tempered :
700-720°C
2) norm + temp :
920°C/air+700-720°C
3) tempered :
730-750°C
4) norm + temp :
940°C/air+730-750°C
Application:
|
Materials |
Multipass joint
welding |
|
|
Fine grain structural steels |
With wire electrode |
|
StE 255 , WStE 255 |
50-12,50-15 |
|
StE 285 , WStE 285 |
50-12,50-15 |
|
StE315 , WStE 315 |
50-12,50-15 |
|
StE355 , WStE 355 |
50-12,50-15 |
|
StE380 , WStE 380 |
50-15,50-57 |
|
StE420 , WStE 420 |
50-15,50-57 |
|
StE460 , WStE 460 |
50-57 |
|
StE500 , WStE 500 |
50-57(1),50-21(2) |
|
TStE250 , EStE 255 |
50-24,50-15,50-57(3) |
|
TStE285 , EStE 285 |
50-24,50-15,50-57(3) |
|
TStE315 , EStE 315 |
50-24,50-15,50-57(3) |
|
TStE355 , EStE 355 |
50-24,50-15,50-57(3) |
|
TStE380 , EStE 380 |
50-24,50-15,50-57(3) |
|
TStE420 , EStE 420 |
50-24,50-15,50-57(3) |
|
TStE460 , EStE 460 |
50-57 |
|
TStE500 , EStE 500 |
50-57(1),50-21(2) |
|
Creep resistant steels |
With wire electrode |
|
15 Mo3 |
50-14,50-17 |
|
13 Cr Mo 44 |
50-22 |
|
StE 210.7, StE 240.7 |
50-23 |
|
Cryogenic steels |
With wire electrode |
|
10 Ni 14(4) |
50-25 |
|
TTSt 35N, TTSt 35 V |
50-25 |
|
TTSt 41N, TTSt 41 V |
50-25 |
|
Non-ageing steels |
With wire electrode |
|
ASt 35,ASt 41 |
50-15 |
|
ASt 45,ASt 52 |
50-15 |
1) only thinner plates
2) Also for
stress-relived condition
3) Observe minimum
temperature of -40°C
4) Lowest service
temperature -80°C
|
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