Submerge Wire (LSW-EM12K) and Flux (LSF56) F7A2-EM12K
(Submerge Wires and Flux)
Characteristics:
LSF-56 is a neutral flux. It is designed for multi-pass groove welds. With nice bead appearance, porosity resistance and good slag removability. High welding efficiency, good toughness can be obtained. It produces good impact property and minimum 500N/mm² tensile strength when used with LSW-EM12K.
Applications:
Typical applications include pressure vessels, shipbuilding and general steel structure.
Notes on Usage:
- Dry the flux at 350°C for 60 minutes before use.
- When performing first pass welding, it is recommend to use lower current to prevent cracking.
Classification:
AWS A5.17 F7A2-EM12K
JIS Z3183 S502-H
Typical chemical composition of weld metal (wt%)
| C | Mn | Si | P | S |
| 0.08 | 1.60 | 0.53 | 0.019 | 0.015 |
Typical mechanical properties of weld metal
| YP N/mm2 | TS N/mm2 | EL % | IV J | |
| 460 | 560 | 29 | - 30 ºC J | - 40 ºC J |
| 55 | 40 | |||
Sizes and recommended current range ( DC+)
| )Wire: Diameter (mm) | 2.4 | 3.2 | 4.0 |
| Wire: Weight per roll (kg) | 25 | 25 | 25 |
| Flux: Weight per bag(kg) | 25 | 25 | 25 |
