Agglomerated Manganese-Silicate type flux for high-speed welding. It is preferably used for welding thin plates at speeds higher than 2.5 meter/min. Welding properties arc outstanding on either AC or DC up to 800A. AMA OP155 is Suitable for Welding tube-web-tube joints on finned tubes. Exhibiting slag removal. It is likewise suited for tandem and multi-wire welding. AMA OP155 produce high Manganese pick-up which decreases with increasing Manganese content of the wire electrode.
Damp flux shall be redried by baking at 300°C – 350°C Grain size in according to DIN 32 522:2-20
Main Constituents:
SiO2+TiO2
CaO+MgO
Al2O3+MnO
45%
10%
40%
Basicity according to boniszewskii: ~0.8
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
50-11
S1
0.03-0.07
0.4-0.8
1.4-1.8
-
-
50-12
S2
0.03-0.07
0.4-0.8
1.8-2.3
-
-
50-14
S2Mo
0.03-0.07
0.4-0.8
1.8-2.3
0.5
-
50-22
S2crMo1
0.03-0.07
0.4-0.8
1.8-2.3
0.5
1
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
500-600
> 400
> 22
>90 >60 >35
Mechanical properties of Welded joints (typical values):
With Wire electrode
Heat Treatment
Tensile Strength ( N/mm 2 )
Yield Strength ( N/mm 2 )
Impact energy (Joule) ISO -V 20°C ±0°C
50-12**
As Welded
>510
> 360
>50 >30
50-14**
As Welded
>510
> 360
>50 >30
50-22***
As Welded
>440
> 300
>40 -
50-14**
Stress relived
>510
> 360
>50 >30
50-22***
Stress relived
>440
> 300
>50 -
Stress relived at 15hrs/700C *Transverse flat tensile specimen **StE 36 12 mm, welded from both sides in one pass ***13Cr Mo 44, 15 mm, Welded from both sides in one pass
