Submerged Arc Welding Technical Handbook - Esab

OK Flux 10.73 – Spiral pipemill flux
for sour gas service
Classification flux Basicity index Density Grain size
EN 760: SA AB 1 76 AC H5 1.3 ~ 1.2 kg/dm 3 0.2 - 1.6 mm
Slag type Polarity Alloy transfer Hydrogen
Aluminate-basic DC+ / AC Moderately Si and slightly 5 HDM
Mn alloying
OK Flux 10.73 is an
agglomerated, basic flux
designed 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
-0,2
% Si pick-up
from flux
450 A
750 A
% Si in wire
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
12.22 S2Si / EM12K S 42 2 AB S2Si A5.17: F7A2-EM12K A5.17: F6P4-EM12K
12.24 S2Mo; S Mo / EA2 S 46 2 AB S2Mo A5.23: F8A2-EA2-A2 A5.23: F7P0-EA2-A2
12.34 S3Mo; S MnMo / EA4 S 50 2 AB S3Mo A5.23: F8A4-EA4-A4 A5.23: F8P2-EA4-A4
Typical weld metal chemical composition (%), DC+
C Si Mn Cr Ni Mo Other
With OK Autrod
12.22 0.06 0.6 1.1
12.24 0.05 0.5 1.1 0.5
12.34 0.07 0.6 1.5 0.5
The flux alloys some Si and Mn
to the weld metal and works
equally well on DC and AC
current. It can be used in single
wire, tandem and 3 wire
systems.
OK Flux 10.73 produces an
excellent bead shape and a
smooth surface finish. With
various wires, OK Flux 10.73 is
suitable for all pipe steels. Due
to the careful metallurgical
design it produces a weld
metal free from hard-spots and
is therefore suited for sour gas
service pipelines.
Typical weld metal mechanical properties, DC+
ReL / Rp0.2
(MPa)
Rm
(MPa)
A4 / A5
(%)
CVN
(J at °C)
With OK Autrod -18 -20 -29 -40
12.22 430 530 28 60 45 30 AW
12.24 500 580 25 55 50 35 AW
12.34 550 640 25 60 45 35 AW
For more information view the Product Data Sheets or contact ESAB.
AW/
SR
39