En
FaF7AZ-EL12-F7PZ-EM12-F7AZ-EM12-F7AZ-EM12K
op185 ama op185
Flux for Submerged Arc welding of General Struct
AMA OP185
| DIN EN 760: | SA AR 1 88 AC |
| DIN 32 522: | B AR 1 88 AC 10 SKM |
| AWS/ASME: | F7AZ-EL12 |
| AWS/ASME: | F7AZ-EM12 |
| AWS/ASME: | F7PZ-EM12 |
| AWS/ASME: | F7AZ-EM12K |
Application and properties:
Agglomerated Aluminate-rutile type flux for welding general structural steels, pressure vessel and pipe steels, as well as fine grain structural steels having a yield strength of up to 355N/mm2. AMA OP 185 produces a high, silicon and manganese pick-up and can therefore be used with 50-11, 50-12 wire electrodes.
It is particularly suited for high-speed welding applying the twin-wire process, as well as for tandem and multi-wire welding. Owing to its metallurgical behavior; AMA OP 185 can be advantageously used for welding from both sides in one pass. It is outstanding for welding tube-web-tube joints or finned tubes.
On account of easy slag removal, AMA OP 185 is preferably used in fillet welding.
The weld metal produced with this flux is not susceptible to porosity when welding on surfaces contaminated by rust, scale etc. The flux has a low bulk density with correspondingly low consumption.
AMA OP 185 can be used on either DC or AC up to 1000A.
Damp flux shall be redried by baking at 300°C – 350°C
Grain size in accordance with DIN 32 522:2-20
| SiO2+TiO2 | Al2O3 | CaF2 |
|---|---|---|
| 30% | 55% | 5% |
Basicity to boniszewskii: ~0.5
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
All -Weld metal analysis (typical values):
| With Wire Electrode | Weight % | |||||
|---|---|---|---|---|---|---|
| AMA Trade Name | DIN/EN | C | Si | Mn | Mo | Cr |
| 50-11 | S1 | 0.04-0.08 | 0.5-0.8 | 1.2-1.6 | - | - |
| 50-12 | S2 | 0.04-0.08 | 0.5-0.8 | 1.4-1.8 | - | - |
| 50-14 | S2Mo | 0.04-0.08 | 0.5-0.8 | 1.4-1.8 | 0.5 | - |
| 50-22 | S2crMo1 | 0.05-0.10 | 0.5-0.8 | 1.4-1.8 | 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+ |
|---|---|---|---|---|---|
| 50-11 | As Welded | 500-600 | > 400 | > 24 | > 50 |
| 50-12 | As Welded | 530-630 | > 420 | > 22 | > 50 |
| 50-14 | As Welded | 580-680 | > 440 | > 20 | > 50 |
Mechanical properties of welded joints (typical values):
13 Cr Mo 44, 10 mm Welded From both sides in one pass.
| With Wire Electrode | Heat Treatment |
*Tensile Strength ( N/mm 2 ) |
*Yield Strength ( N/mm 2 ) |
Impact energy
(Joule)
ISO -V 20°C+ |
|---|---|---|---|---|
| 50-22 | As Welded | > 440 | > 300 | > 70 |
| 50-22 | Stress relived | > 440 | > 300 | > 80 |
Stress relived 15 hrs/700C
*Transverse flat tensile specimen
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 | 50-11,50-12 | 50-12 |
| St 44-2, St 44-3 | 50-11,50-12 | 50-12 |
| St 52-3** | 50-12 | 50-12 |
| Pipe Steels | With wire electrode | With wire electrode |
| StE 210.7, StE 240.7, StE 290.7 | 50-11 | 50-12 |
| StE 320.7, StE 360.7 | 50-12 | 50-12 |
| St 37, St 37.4, St 35.8 | 50-11 | 50-12 |
| St 44, St 44.4, St 45.8 | 50-11 | 50-12 |
| St 52, St 52.4 | 50-12 | - |
| Boiler Plates | With wire electrode | With wire electrode |
| H I, H II | 50-11,50-12 | 50-11,50-12 |
| 17 Mn 4, 19 Mn 5 | 50-12 | 50-11,5012 |
| 15 Mo 3 | 50-14 | 50-14 |
| 13 Cr Mo 44* | - | 50-22 |
| Fine grain structural steels | With wire electrode | With wire electrode |
| StE 255, StE 355** | 50-11,50-12 | 50-12 |
*Only for fillet welds or tube-web-tube welding on finned tubes.
**At service temperatures down to +0°C
