Agglomerated fluoride-basic type flux for welding general structural steels pressure vessels, pipe steels, as well as fine grain structural steels. Owing to the manganese pick-up caused by AMA-OP120TT, low manganese wire electrodes will find an extended field of application. AMA-OP120TT is outstanding for tandem, multi-wire and twin-wire welding. It delivers a weld metal featuring excellent toughness properties and crack resistance. AMA-OP120TT can be used on either DC (positive) or AC up to approximately 1000A.
Damp flux shall be redried by baking at 300°C-350°C Grain size according to DIN 32 522:2-20
Main Constituents:
SiO2+TiO2
CaO+MgO
Al2O3+MnO
CaF2
15%
35%
20%
30%
Basicity to boniszewskii: ~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):
AMA Trade Name
DIN/EN
C
Si
Mn
Mo
Cr
Cr
50-11
S1
0.04-0.08
0.10-0.25
0.7-1.0
-
-
-
50-12
S2
0.04-0.08
0.20-0.40
1.0-1.4
-
-
-
50-15
S3
0.04-0.08
0.20-0.40
1.4-1.7
-
-
-
50-14
S2Mo
0.04-0.08
0.20-0.40
1.0-1.4
0.5
-
-
50-22
S2crMo1
0.04-0.08
0.20-0.40
1.0-1.4
0.5
1
-
50-24
S2Ni1
0.04-0.08
0.25-0.50
1.3-1.6
-
-
1.0
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 -40°C -60°C
