Low-temperature Aluminium Brazing Alloy

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Metaconcept offers you quality rods made from silver, tin and ammonium chloride alloys for low-temperature aluminium brazing. With melting temperatures of around 221°C, they are designed for a variety of uses. Metaconcept’s low-temperature aluminium brazing alloys are used in a variety of sectors.

Low-temperature Aluminium Brazing Techniques

Brazing is the process of joining two metals of the same or different types using a brazing alloy. This is a filler metal rod with a lower melting point than the parts to be joined. There are generally two types of brazing: soft soldering and hard soldering. Unlike brazing alloys, which melt at between 600 and 700°C, soft brazing alloys melt at between 180° and 250°C. According to the standards, brazing is soft if the melting temperature of the filler metals is below 450°C.

Low-temperature aluminium brazing alloys are used specifically for assembling aluminium parts. The rods have a melting point of around 380°C. They are composed of silver, tin and ammonium chloride. They can be used with fluxes in paste, powder or gel form. Low-temperature aluminium brazing filler metals come in various forms: coated or bare rods, cored or bare wires, etc.

Low-temperature Aluminium Brazing Applications

Low-temperature aluminium brazing fittings are widely used in the industrial sector. It is used to assemble various aluminium parts. Jewellery manufacturers, garages, heating engineers, small plumbing jobs, refrigeration specialists, plumbers, locksmiths, repairers (motorbikes, cars, cycles, etc.) also use it. The rods used guarantee the quality of the brazing.

Low-temperature aluminium brazing is easy to use. It can be carried out using any heat source capable of raising the temperature of the base metals to 380°C: gas campers, blowtorches, etc.

So how do you braze aluminium at low temperature? First you need to brush the parts to remove the alumina (or aluminium trioxide) covering the surface. To do this, use a stainless steel brush. Brazing must be carried out within 10 minutes of brushing to prevent the alumina from forming again. To proceed, heat the surface using a heat source suited to the thickness of the aluminium: acetylene oxygen torch, butane torch, soldering torch, etc. Avoid heating the rod directly with the equipment.

Then apply the rod to the areas to be joined. Rub until it melts. Then leave to cool. To obtain a lower solidus/liquidus temperature, Metaconcept can modify the composition of the brazing alloy to silver, tin and ammonium chloride.

Metaconcept, your Partner for low-temperature Aluminium Brazing

To join your aluminium parts securely together, Metaconcept provides you with rods dedicated to soft soldering. Discover our rods for low-temperature aluminium brazing. With us, you’ll benefit from environmentally-friendly products derived from a recycling process. We recycle industrial waste. Metaconcept is a committed creator of alloys.

Our aluminium brazing rods are of the highest quality. Depending on your process requirements and the base metals you wish to join, we can define a specific composition. After brazing, you have the option of filing, tapping or drilling your assembled parts.

In addition to low-temperature aluminium brazing alloys, Metaconcept also offers other rods for a variety of uses: Lomyphos brazing alloys made from copper and phosphorus, copper/phosphorus/silver brazing alloys, silver brazing alloys for brazing, and so on. We can supply these alloys in the quantities you need.

Find out more about the products we offer by contacting our technical experts.

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