F6AO-EL12 F7A2-EM12 F7P2-EM12
op119 ama op119

Flux for Submerged Arc welding of General Struct

AMA OP119

EN 760: SA CS 1 98 AC
DIN 32 522: B CS 1 98 AC 12 M
AWS/ASME: F6AO-EL12    F7A2-EM12    F7P2-EM12
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Application and properties:

Agglomerated Calcium-Silicate type flux for welding general structural steels, pressure vessel steels, pipe steels as well as fine grain structural steels.
It causes a relatively high silicon pick-up and when using wire electrodes 50-11, 50-12, 50-15, also a manganese pick-up. The neutral point for manganese is suited at approximately 2.5%, thus the flux being able to be used with low manganese electrode wires. AMA-OP119 is particularly suited for twin-wire, tandem and multi-wire welding at relatively high speed. It is likewise suited for welding from both sides in one pass. For increased weld metal toughness, wire electrodes containing molybdenum 50-14 should be preferably used. AMA-OP119 can be used on either DC or AC up to approximately 1200A (in single wire welding).
Slag removal is easy. The resulting slag is short, i.e., girth seams on work pieces having a small diameter can be welded without the danger of the slag running off.

Damp flux shall be re-dried by baking at 300°C – 350°C
Grain size in accordance with DIN 32 522:2-20

Main Constituents:

SiO2+TiO2 CaO+MgO Al2O3+MnO CaF2
40% 25% 25% 10%

Basicity to boniszewskii: ~1.0

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 %
DIN/EN C Si Mn Mo
50-11 S1 0.04-0.08 0.7-1.1 1.1-1.4 -
50-12 S2 0.04-0.08 0.7-1.1 1.5-1.8 -
50-14 S2Mo 0.04-0.08 0.7-1.1 1.5-1.8 0.5

Mechanical properties of all-weld metal (typical values):

With Wire Electrode Heat Treatment Tensile Strength
(N/mm 2 ) 		Yield Strength
(N/mm 2 ) 		Elongation
Lo=5d % 		Impact energy (Joule)
ISO -V
20°C     ±0°C     -20°C
50-11 As Welded 460-560 > 360 > 24 >90        >50        >30
50-12 As Welded 530-630 > 400 > 24 >90        >50        >35
50-14 As Welded 600-700 > 480 > 20 >65        >50        >35

Application:

Materials Multi pass joint welding Welding from both sides in one pass
General structural steels With wire electrode With wire electrode
St 37-2, USt 37-2, RSt 37-2 50-11 50-11,50-14
St37-3, St44-2, St44-3, St52-3 50-12 50-11.50-14
Pipe Steels With wire electrode With wire electrode
StE 210.7, StE 240.7, StE 290.7 50-11 50-12.50-14
StE 320.7, StE 360.7 50-12 50-12,50-14
St 37, St 37.4, St 45.8 50-11 50-12,50-14
St 44, St 44.4, St 37.8 50-12 50-12,50-14
St 52, St 52.4 50-12 50-12,50-14
X42 50-11 50-12,50-14
X46, X52, X56 50-12 50-12,50-14
X60, X65, X70 50-14 50-12,50-14
Boiler plates With wire electrode With wire electrode
H I, H II 50-11 50-12,50-14
17 Mn 4, 19 Mn 5 50-12 50-12,50-14
Fine grain structural steels With wire electrode With wire electrode
StE255, WStE255 50-12 50-12,50-14
StE285, WStE285 50-12 50-12,50-14
StE315, WStE315 50-12 50-12,50-14
StE355, WStE355 50-12 50-12,50-14

For welding from both side in one pass , especially in multi -wire welding 50-14 wire electrode should be used
Because of the fine – grain formation caused by molybdenum.
Aproval: LRS , GL