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→4.2 Fluxes
Since the residues of fluxes are hygroscopic and can cause corrosion they have to be removed completely after the brazing process in very hot or boiling water. Depending on the type and process used, fluxes are being applied in liquid form or as powders or pastes.
<table border="1" cellspacing="0" style="border-collapse:collapse"><tr><td><p class="s8">Designation</p><p class="s8">DIN EN 1045</p></td><td><p class="s8">Designation US (similar)</p></td><td><p class="s8">Active tempe- rature range [°C]</p></td><td><p class="s8">Chemical ingredients</p></td><td><p class="s8">Base materials used for</p></td></tr><tr><td><p class="s8">TYP FH 10</p></td><td><p class="s8">FB 3-A</p></td><td><p class="s8">550 - 800</p></td><td><p class="s8">Boron compounds, Fluorides</p></td><td><p class="s8">All metals and alloys except light metals, alloyed steels, carbide steels</p></td></tr><tr><td><p class="s8">TYP FH 11</p></td><td><p class="s8">FB 4-A</p></td><td><p class="s8">550 - 800</p></td><td><p class="s8">Boron compounds,</p><p class="s8">Fluorides, Chlorides</p></td><td><p class="s8">Copper,</p><p class="s8">Aluminum bronze</p></td></tr><tr><td><p class="s8">TYP FH 12</p></td><td><p class="s8">FB 3-C</p></td><td><p class="s8">550 - 850</p></td><td><p class="s8">Boron,</p><p class="s8">Boron compounds, Fluorides</p></td><td><p class="s8">Special brass,</p><p class="s8">any steel alloys, carbide steel</p></td></tr><tr><td><p class="s8">TYP FH 21</p></td><td><p class="s8">FB 3-I</p></td><td><p class="s8">750 - 1100</p></td><td><p class="s8">Boron compounds, Chlorides</p></td><td><p class="s8">All metals and alloys</p><p class="s8">except light metals</p></td></tr></table>
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|+ 4.2 Fluxes for the Brazing of Heavy Metals