NITRAL 1251
NITRAL 1251 was formulated for the brazing of aluminium parts or heat exchangers cladded with Aluminium/Silicone by the C.A.B. process (Controlled Atmosphere Brazing).
| Reference | Standard / Specificity | Nature | Base metal | Solder | Activity range °C | Heating system / Characteristics |
|---|---|---|---|---|---|---|
NITRAL 1251 | ISO EN 1045 - FL20 |  | Aluminium | Al/Si | 550-610° C |
CAB non-corrosive flux |
Physico-chemical characteristics
Formulated with a mix of fluoro-aluminates, which ensures the brazing at high temperatures.
White powder.
Precautions and recommendations for use
Refer to health and safefy datasheet befire use.
Directions for use
After degreasing, the parts to be brazed are fluxed by dipping or spraying, then dried at circa 300°C (575° F). After preheating the parts, they are brazed in a furnace at 600– 605°C (1112° F – 1121° F), this step is followed by a cooling stage. The brazed parts are perfectly clean and without corrosive residues. No additional cleaning is necessary. Settings and quantities of flux to be applied, must be determined by your technical department during the set-up and preparation of the fluxing solution. To keep a stable solution, the flux bath must be continuously stirred.
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