Submerged Arc Welding Technical Handbook - Esab

OK Flux 10.77 – Spiral pipemill
flux for high speed welding
Classification flux Basicity index Density Grain size
EN 760: SA AB 1 67 AC H5 1.3 ~ 1.2 kg/dm 3 0.2 - 1.6 mm
Slag type Polarity Alloy transfer Hydrogen
Aluminate-basic DC+ / AC Slightly Si and moderately Mn ≤ 5 HDM
alloying
OK Flux 10.77 is an
agglomerated, basic flux
designed primarily for multi-wire
procedures in the production of
spiral welded line pipes.
Flux consumption
kg flux / kg wire
Voltage DC+ AC
26 0.7 0.6
30 1.0 0.9
34 1.3 1.2
38 1.6 1.4
Classification
1,0
0,8
0,6
0,4
0,2
0,0
% Si pick-up
from flux
450 A
750 A
% Si in wire
-0,2
0,05 0,10 0,15 0,20 0,25 0,30
Single wire, ø 4.0 mm, DC+, 30 V, 60 cm/min
1,8
1,4
1,0
0,6
0,2
-0,2
-0,6
-1,0
% Mn pick-up
from flux
450 A
750 A
% Mn in wire
0,5 1,0 1,5 2,0
Wire
Weld metal
OK Autrod EN / AWS EN / AW AWS / AW AWS / PWHT
12.20 S2 / EM12 S 38 4 AB S2 A5.17: F7A4-EM12 A5.17: F6P4-EM12
12.22 S2Si / EM12K S 38 4 AB S2Si A5.17: F7A5-EM12K A5.17: F6P5-EM12K
12.24 S2Mo; S Mo / EA2 S 46 2 AB S2Mo A5.23: F8A4-EA2-A2 A5.23: F7P2-EA2-A2
12.34 S3Mo; S MnMo / EA4 S 50 3 AB S3Mo A5.23: F8A4-EA4-A4 A5.23: F8P2-EA4-A4
13.64 SZ / EG (two-run classification, see Product Data Sheet)
Approvals*
ABS BV DNV GL LR TÜV DB CE
OK Flux 10.77
x
with OK Autrod
12.20 x
12.22 x
12.24 x
The flux alloys some Si and Mn
to the weld metal and it works
equally well on DC and AC
current. It is used in single wire,
tandem and 3 wire systems
and it is also suitable for
longitudinal welded pipes of
limited plate thicknesses.
OK Flux 10.77 produces
welded joints with shallow
reinforcement, low transition
angles and smooth surface
finish even at high welding
speeds. A shallow
reinforcement means cost
saving in the later pipe coating
operation, since the coating
thickness can be reduced. With
different wires it is suitable for
all mild and high strength line
pipe steels.
Typical weld metal chemical composition (%), DC+
C Si Mn Cr Ni Mo Other
With OK Autrod
12.20 0.06 0.3 1.4
12.22 0.07 0.4 1.4
12.24 0.07 0.3 1.3 0.5
12.34 0.08 0.3 1.5 0.5
Typical weld metal mechanical properties, DC+
ReL / Rp0.2
(MPa)
Rm
(MPa)
A4 / A5
(%)
CVN
(J at °C)
With OK Autrod -20 -29 -40 -46
12.20 420 500 28 80 65 55 AW
12.22 420 520 26 130 110 80 50 AW
12.24 495 580 25 60 50 40 AW
12.34 540 630 25 70 60 45 AW
AW/
SR
Remarks
For more information view the Product Data Sheets or contact ESAB.
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