Agglomerated aluminate-basic type flux for welding of pipe steels according to DIN 17172 and API 5L steels up to X70. Weld metal hardness is less than 240HV and resistant to sour gas environment. AMA OP132 produces a slight silicon and manganese pick-up. Weld metal toughness in low temperature is very good. When using this flux with S2MoTiB or S3MoTiB wire, the toughness of weld metal will be increased. It is suitable for longitudinal welding of sour gas and oil pipes and spiral pipes at high speed welding with single and multi-wire (up to 5 wires) welding system. The weld bead is of uniform profile, good wetting without undercut. The slag detachment is excellent. AMA OP132 can be used on either DC (positive) or AC up to 1200A on a single wire. Damp flux shall be redried by baking at 300 – 350 c Grain size in according with Din 32 522:3-18.
Main Constituents:
SiO2+TiO2
CaO+MgO
Al2O3+Mno
CaF2
20%
25%
35%
15%
Basicity to boniszewski: ~1.5
All weld metal analysis (typical values):
AMA Trade Name
DIN/EN
C
Si
Mn
Mo
50-11
S1
0.06
0.15
0.8
-
50-12
S2
0.06
0.20
1.3
-
50-14
S2Mo
0.05
0.20
1.3
0.47
50-18
S4
0.06
0.30
1.8
-
Mechanical properties of all-weld metal (typical values):
Welding Wire
Heat Treatment
Heat Treatment (N/mm 2 )
Tensile Strength (N/mm 2 )
Elongation Lo=5d%
Impact Value (Joule) ISO -V 0°C -20°C -40°C -60°C
50-11
As Welded
470
360
26.5
200 80 - -
50-12
As Welded
520
420
28
- 160 120 -
50-14
As Welded
580
495
23
- 110 60 -
50-18
As Welded
580
480
26
- 105 65 50
Mechanical properties of all-weld metal (typical values):
