Fluxes
FERVEO FLX BFPV
fluxCatalogue only
AWS class
F7A2-EM12/F7A2-EM12K
EN ISO class
SA FB 1 66 AC H5
Classification
| AWS class | F7A2-EM12/F7A2-EM12K |
|---|---|
| EN ISO class | SA FB 1 66 AC H5 |
| Other standards | EN ISO 14174: SA FB 1 66 AC H5 |
Purpose
- Fluoride-basic submerged-arc (SAW) flux, high basicity (2.8), low hydrogen — double-wire and narrow-gap welding of thick plate and pressure vessels.
Why it works
The highest basicity among the FERVEO FLX family's general-fabrication grades (fluoride-basic system, versus the aluminate-basic FERVEO FLX BFPP) gives the best low-temperature toughness in double-wire/narrow-gap thick-section work — the step up from FERVEO FLX BFPP when pressure-vessel-grade toughness is required.
Fields of application
- Pressure vessels, thick steel plate, double-wire and narrow-gap welding.
Mechanical properties
Process
Advantages
- The highest toughness and lowest hydrogen among the family's general aluminate/fluoride-basic grades — the pressure-vessel-grade option.
Limitations
- Fluoride-basic fluxes are generally less forgiving to weld with (narrower parameter window) than aluminate-basic types like FERVEO FLX BFPP — reserve for duty that genuinely needs this toughness level.