Description
Characteristics:
LSF-39 is an active flux. It is designed for butt or fillet welding on sheet metal with nice bead appearance, porosity resistance and good slag forming and removing and improved toughness. prevent porosity during welding. It is recommend for single pass welding steel plate under 25 mm thick.
Applications:
Typical applications include pressure vessels, H beam, pipe-mill application, shipbuilding, LPG Tank and general steel structure.
Notes on Usage:
1. Dry the flux at 350℃ for 60 minutes before use
2. Not recommended to welding more than two passes.
Classification:
AWS A5.17 F7A2-EM12K
Typical chemical composition of weld metal (wt%)
| C | Mn | Si | P | S |
| 0.09 | 1.33 | 0.6 | 0.015 | 0.010 |
Typical mechanical properties of weld metal
| YP N/mm2 | TS N/mm2 | EL % | IV -20ºC J |
| 436 | 533 | 27.5 | 67 |
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 |
