Aluminum-zinc soldering alloys, flux, and pre-formed rings for low-temperature joining of aluminum components. Covering the full system: flux paste, flux powder, solid wire, flux core wire, and rings — all in a single product family.
The Soldertec™ range provides a complete Al-Zn soldering system for aluminum-to-aluminum and aluminum-to-copper joining at temperatures well below conventional brazing. The lower process temperature reduces heat distortion risk and allows joining of thin-wall components that would be damaged at brazing temperatures.
Three zinc content grades (98% Al, 85% Al, 78% Al) allow process engineers to balance joint strength, corrosion resistance, and working temperature. Flux core wire eliminates separate flux application; solid wire is used with Soldertec™ 780 flux. Pre-formed rings ensure consistent filler metal placement on tube ends and fittings.
| Grade | Active Range | Application | Process | Viscosity / Form | Flux Content | Packaging |
|---|---|---|---|---|---|---|
| 780 Paste | 470°C – 490°C | Manual / Auto-Dispense | Flame Soldering | 500–75,000 cP | 20–70% | 10 kg, 20 kg, 25 kg / 20 lb, 40 lb, 50 lb |
| 780 Powder | 470°C – 490°C | Manual | Flame Soldering | 100% powder | 100% | 1 kg, 10 kg, 20 kg |
| Grade | Al % | Zn % | Type | Flux Core % | Melting Range | Diameters | Form |
|---|---|---|---|---|---|---|---|
| 980FC FC | 98 | 2 | Flux Core | 10–26% | 375°C – 388°C | 1.6–2.4 mm | 500 mm cut / 5 kg spool |
| 780FC FC | 78 | 22 | Flux Core | 10–26% | 440°C – 470°C | 1.6–2.4 mm | 500 mm cut / 5 kg spool |
| 980 | 98 | 2 | Solid | 0% | 375°C – 388°C | 1.6–2.4 mm | 500 mm cut / 5 kg spool |
| 850 | 85 | 15 | Solid | 0% | 382°C – 450°C | 1.6–2.4 mm | 500 mm cut / 5 kg spool |
| 780 | 78 | 22 | Solid | 0% | 440°C – 470°C | 1.6–2.4 mm | 500 mm cut / 5 kg spool |
| Requirement | Recommended Grade | Notes |
|---|---|---|
| Lowest possible process temperature | 980 / 980FC | Al 98% / Zn 2% — 375–388°C |
| Intermediate temperature, balanced strength | 850 | Al 85% / Zn 15% — 382–450°C |
| Higher zinc, better wetting on aluminium | 780 / 780FC | Al 78% / Zn 22% — 440–470°C |
| No separate flux — torch brazing | 980FC or 780FC | Flux Core wire eliminates flux step |
| Pre-placed filler on fittings | Soldertec™ Rings | Specify ID and wire gauge |
| Parameter | Value |
|---|---|
| Inside Diameter Range | 4 mm – 50 mm |
| Wire Diameter Range | 1.4 mm – 2.4 mm |
| Dimensional Tolerance | ±0.50 mm |
| Flux Core Content | 12% – 26% |
| Custom Sizes | Available to customer specification |
Full TDS, SDS, alloy grade datasheet, and custom ring sizing available on request.
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