Paste Brazing & Soldering Alloys - Fusion Incorporated - #9

Brazing

Fusion

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^ Fluxes & Filler Metals

Solder Fluxe Filler Metals

NDA Mostlpotent fluxing action (coj>^-tains halides) in this group. Affords the longest flux!lifeforejiterrâed heating cycles. Flux residues are completely watej^râshible. Pair with 1070, 1040, '22, and AQ71 filler metals.

ASN A non-corrosive solder flux recom­mended for applications such as alu­minum heat exchangers, inlet/outlet tube assemblies, condenser "piccolo" joints, and other assemblies consisting of 6061 and 6262 base metals. The flux residue left after soldering is non-corro­sive, thus no flux removal is required. Pair with all solder filler metals listed in the chart below.

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sion has several paste alloys for ning aluminum in open air, using nventional heating techniques and

automated processes. Since the melting range of Fusion filler metals is very close to that of the base metals^-themselves, control of heatis-fnost important. Both water washable and non<orrosrve^fljjx formulations permit joining^? several commercially available aluminum base metals.

BNC Similar to TNC with higher tem­perature fluxing and reduced (visible) post brazing residue; not water washable. Pairwith 1070 and 1040 filler metals.

KNC For use with lower melt point aluminum base metals like 6061 and 6262. Also suitable with 6063 and 3003 base metals; not water washable. Pairwith 1040, 1022, and A071 filler metals.

GNC Similar to TNC; specially formu­lated to braze 5000 series aluminum and other magnesium-containing alloys. Also suitable for commonly used alloys; not water washable. Pairwith 1070, 1040, 1022, and A071 filler metals.

FAB A non-corrosive formulation with reduced post-brazing residue. Pairwith fine mesh 1070E, 1040E, lÒ2££^and A071E filler metals.

NPA Similar to NDA with milder, more controlled fluxing, which reduces base metal erosion and etching. Recom­mended for thin walled parts; water washable. Pair with 1070, 1040, 1022, and A071 filler rinetals.

NTA Similar to NDA with controlled fluxing and non-slumping characteris­tics. Creamy and smooth appearance due to fine mesh filler metals. Recom­mended for small diameter striping applications or any time paste must stay in place; water washable. Pair with 10>OE^ 1040E, 1022E, Wd A071E filler metalsN\

Non-CorrosiveTluxes \ TNC Chloride-free flux^sttiafAdoes not require post cleaning of the joint area. Flux residue has no detrimental effect on joint service life; not water wash­able. Pairwith 1070, 1040, 1022, and A071 filler metals.

which allow aluminum base metals to be joined at temperatures 300°F below their melting points. This is a significant advantage over conventional brazing filler metals, which typically permit a narrow 40°-100°F mar­gin of safety. These pastes can be used in open air, using conventional heating techniques and automated processes.