Silberlot
Legierungen aus Silber, Cadmium, Kupfer und Zink nennt man Silberlote.
Oft sind auch geringe Anteile von Mangan und Nickel in dem Lot enthalten.
Die Verarbeitungstemperatur beträgt 600 - 800 Grad Celsius.
Die Grenze zwischen Weichlöten und Hartlöten liegt bei 450C°. Beim Weichlöten liegt die Arbeitstemperatur unter 450 °C. Beim Hartlöten über 450°C.
Je mehr Silber in dem Lot enthalten ist um so niedriger ist die Verarbeitungstemperatur. Messinglote fließen nicht so leicht wie Silberlote, deshalb wird das Silberlot zum Verbinden von Kupferrohrfittingen eingesetzt.
Im technischen Modellbau sich Silberlote mit besonders niedrigem Schmelzpunkt besonders gut geeignet. Außerdem werden im Modellbau meistens sehr dünne Silberlotstangen eingesetzt wie zum Beispiel 1mm Silberlotstange oder sogar nur 0.5mm dicker Silberlotdraht. Durch die guten flusseigenschaften und die niedrigen Temperaturen lassen sind auch kleine Lötstellen gut hartlöten. Überall wo im Modellbau Heißdampf anliegt oder ein Spiritusbrenner in der Nähe ist sollte man hartlöten und auf weichlöten verzichten. Zum Beispiel bei Dampfmaschinen, Stirlingmotoren als auch Flammenfressern.
Wenn größere Bauteile hart gelötet werden sollen empfiehlt es sich flussmittel ummantelte Silberlotstangen zu benutzen. Die Silberhartlotstangen die mit flussmittel ummantelt sind haben wir in den Durchmessern 1,5 mm und 2 mm.
Vor dem Löten sollten die zu verbindenden Metallwerkstücke mechanisch und chemisch von Oxiden und Sulfiden gut gereinigt sowie auch entfettet werden.
Die Metalloberflächen sollten „blank“ sein. Damit wird eine gute und schnelle Benetzung des Lotes zusammen mit einem geeigneten Flussmittel auf den Oberflächen ermöglicht und damit die Lötung wesentlich unterstützt. Besonders bei Weich-Lötungen im Elektronikbereich ist es außerdem noch sinnvoll, die Oberflächen der Werkstücke bzw. die Bauelementedrähte mit dem Lot vor der eigentlichen Zusammenlötung vorab noch zu verzinnen.
Das Flussmittel löst dabei während des Lötens die sich ständig neu bildenden Oxidschichten auf den Metalloberflächen der Werkstücke auf. Es schützt damit vor erneuter Oxidation während des Lötprozesses und verbessert die Fließfähigkeit des Lotes, wobei die zu verbindenden Werkstücke auf die Temperatur des flüssigen Lotes aufgeheizt sein müssen.
Das ist z. B. bei wärmeempfindlichen elektronischen Komponenten zu beachten, d. h. es sind maximale Lötzeiten einzuhalten!
Die Wärmezufuhrkapazität über z. B. Lötkolben oder Gasbrenner (wir empfehlen die Lötlampe Lötlampe LASER 3000) und somit auch die Löttemperatur müssen an das betreffende Lot, die Größe der Lötstelle und deren Wärmeableitung an das Werkstück angepasst sein. Weil die Zugfestigkeit besonders bei Weichloten gewöhnlich geringer als die der zu verbindenden Materialien ist, sollte die Lotschicht bei hohen mechanischen Kräften daher möglichst dünn sein.
Eine Anleitung wie man Messing und Kupfer mit Silberlot hartlötet finden Sie hinter diesem Link.
Hartlöten mit Silberlot
Tip
Flux for silver solder
€11.60*
When brazing, fluxes have the task of loosening and removing the oxide layers present on the soldering surfaces and preventing them from forming again during soldering. The flux is adjusted to the working temperature of our Silver hard solder matched. Before use, the flux for silver solder should be stirred well. Using the brush in the bottle, a thin layer can be applied to the component to be soldered. You can find detailed instructions in our model making magazine (Hard soldering with silver solder instructions). If the silver brazing flux has dried out, you can make it liquid again with distilled water. Brazing with silver solder rods without flux is not possible.
When the flux is heated with the burner, the water it contains first evaporates. This can be seen in the final formation of small bubbles. When the component is heated further with the flux and the working temperature is reached, the flux paste begins to melt and becomes transparent. Now the moment has come where the silver solder can be added.
The effective range of the flux for silver solder is between 500°C and 800°C.
The flux is suitable for brazing copper, brass, gunmetal, steel and stainless steel.
Tip: Flux residues and discoloration of the material can be optimally removed with our Satin brushes or remove with abrasive fleece.
You can get the flux for silver solder from us in the packaging sizes:
50g. Bottle with brush
100g.Bottle without brush
Product number:
31322M
Content: 100 Kilogramm (€0.12* / 1 Kilogramm)
Variants from €8.30*
Flux-coated High-silver Brazing Alloy
€27.90*
Flux-Coated High-Silver Brazing Alloy
For coarser soldering work in model making, crafts, or industry, we offer flux-coated silver solder rods with a diameter of 1.5mm or 2mm. These high-quality L-Ag55 solder bars contain 55% silver and have a working temperature of 630°C. The flux range is between 500°C and 800°C, eliminating the need for additional brazing flux.
When brazing brass, a low working temperature is crucial. The high silver content not only reduces the required temperature but also enhances the flow properties. Additionally, silver bonds well with other metals, ensuring strong and durable joints.
Versatile Applications
Our flux-coated silver solder rods are ideal for brazing:
Brass
Copper
Heavy metals
Rusting steels
Stainless steel
All these materials can also be joined together. Thanks to the integrated flux coating, no additional flux is required. For more details, refer to our model magazine guide on brazing flux-coated silver solder rods.
Product Features
Diameter: 1.5mm or 2mm
Length: 500mm
Material: L-Ag55 silver solder (55% silver)
Working temperature: 630°C
Flux range: 500°C – 800°C
No additional flux needed
Cadmium-free (Cd-free)
Product number:
3138M
Tip
High-alloyed silver solder 1mm / 1,5mm
€12.20*
We have silver braided bars with a silver content of 55% (L-Ag55) with a length of 500mm. Because of the relatively low melting point of this silver braze, the model builder in the field of technical model building is almost exclusively concerned. The working temperature of this hard solder is 630 ° C. The silver as an alloying component in the solder does not only reduce the working temperature, but also improves the flow properties. Furthermore, silver has the positive property of combining well with other metals. For brazing brass and steel, silver solder flux is essential. The low working temperature of the silver solder bars allows the thermal load to be as low as possible for the processed material. It is important not to heat the workpieces too much, especially in the case of brass. In combination with our silver solder flux you achieve with these silver solder always optimal results.
The silver braided bars can be purchased from us in the shop in 2 different diameters. For fine soldering as it often happens in technical model construction we recommend the 1mm rods. The 1mm silver braided bars are easy to carry with the hand and can be easily melted with small burners. For larger parts we prefer the 1.5 mm silver solder bars. With these rods you get faster material to the soldering point if needed. What can be brazed?The following materials can be combined with silver solder: brass, copper, gunmetal, gray cast iron, rusting steels and stainless steel. A combination of the materials among each other is easily possible with this silver braze solder. If the material is not known to you, it is always recommended to solder a piece to the sample beforehand. This allows you to determine whether the materials can be combined with the silver braze.Instructions Brazing with silver solder
If you have never worked on silver solder and you are not sure how the exact solder brazing procedure is with silver solder, we can help you before you buy the silver solder. We have created a guide for you in our Bengs Modellbaumagazin on the topic "Brazing with silver solder". Here you can find out what you need and have to consider if you want to solder 2 components with silver solder.
Tip: Flux residues and discoloration of the material can be optimally eliminated with our satin brushes or abrasive fleece!Characteristics of the silver solder bars500 mm long.
1mm or 1.5mm diameter
Silver solder bars L-Ag55 (55% silver)
Working temperature 630 ° C
Bengs Modellbau has used this silver solder bars for years.
Product number:
3131M
Silver solder wire
€37.90*
The silver solder wire is suitable for particularly fine soldering points in model making, crafts, industry or jewelery trade. Silver solder wire is only 0.5mm thick and can be very finely dosed. We supply you the silver braided wire as a 5 meter long piece and you can cut the silver solder wire as desired.
You can also use this silver solder wire to form rings, for example, which can be used to solder a wave around the shaft during soldering and then only have to heat it with flux. By this process the silver solder is equal in the required place.
The working temperature of this hard solder is 630 ° C. The silver as an alloying component in the solder does not only reduce the working temperature but also improves the flow properties. Furthermore, silver has the positive property of combining well with other metals. Brazing flux is essential for brazing brass and steel.
Tip: Flux remedies and discoloration of the material can be optimally eliminated with our Satinbrushes!
The silver solder wire 0.5 mm is suitable for brazing brass, copper, heavy metals, steels and stainless steel. All materials can be joined together. 1 Packing unit includes 5m 0.5mm silver solder wire
Silver solder wire L-Ag55 (55% silver)
!!! Cadmium free !!!
Product number:
3133
Soldering paste
€30.70*
Ready-to-use and dosing silver solder paste, 56% silver content (L-Ag55) with the working temperature 650 ° C. The silver solder paste is suitable for fine brazing. The hard solder paste is suitable for creating almost invisible soldering seams, even in inaccessible places. With our silver soldering paste, there are virtually no solder residues at the soldering point, which must be labored. No flux required. Dried silver soldering paste is made ready for use again with a few drops of water. Mix thoroughly before removing.
Typical application examples for the silver soldering paste are:
Apparatus and equipment for the food industry
silver contacts
Bronze and brass fittings
Modelling
piping
Heat and cooling technology
Fashion Jewelry
glasses manufacturing
Precision Engineering
!!! The silver soldering paste is also suitable for kiln soldering (furnace should have a working temperature of at least 680 ° C) !!!
Contents 10 g
Here you will find a tutorial on how to braze with silver solder paste.
Product number:
3441
Content: 10 Gramm (€307.00* / 100 Gramm)