What is brazing?

Brazing is a process of METAL JOINING THROUGH HEAT AND THE ADDITION OF A BRAZING FILLER METAL.

THE BRAZING FILLER METAL MUST HAVE A MELTING POINT ABOVE 450° C (850° F) AND BELOW THE MELTING POINT OF THE METAL TO BE BRAZED

THE BRAZING PROCESS is, without a shadow of a doubt, one of the most versatile, safest, and easiest for metal joining.

Let's see why

Joints made through brazing are very resistant whether to join ferrous or non-ferrous metals. Many times the tension resistance of two brazed parts is even better than the two base metals themselves.

Brazing is quite inexpensive when compared to other processes as it requires of little filler metal for joining two parts up to their maximum resistance.

Through brazing is even possible to join dissimilar metals, including those ones of different mass and melting point

The process is quick. It is only necessary to reach the brazing temperature which is just above 450° C, yet quite below the melting point of the metals to be brazed.

For these reasons, if you want to join well two parts of equal or different chemical composition or size, without overheating them, and getting durable and highly resistant junctures, without modifying the metallurgical structure (a common factor of fracture due to high temperature), you must considerBRAZING.

The needed energy as heat for reaching the brazing temperature can be obtained in many ways, to name:

• Oxy-gas Torch
• Electric Oven
• Resistance and Induction, immersion

The most typical heating method has been through Oxy-gas using oxygen-acetylene, oxygen-propane, or air-propane for the burning.

The brazing filler metals (rods) are metallic alloys usually made of silver, copper and phosphorus alloys in different proportions, as well as silver, copper, zinc, cadmium, tin, among other alloying elements.

ARGENTA has developed alloys of special shapes and sizes to be used in brazing, making use of unalloyed metals such as Chilean silver and copper.

The ARGENTA manufactured alloys have a low melting point. When they reach the brazing temperature through any method they melt and flow easily on clean and properly heated metallic surfaces.

The ARGENTA alloys, manufactured with pure and precise elements, have a great capacity and capillary fluidity, being capable of flowing through little, light, or juncture spaces up to 0.03 mm.

The above mentioned is just what makes brazing itself possible, i.e.:

Once the filler metal melts, it becomes into a capillary fluid state, penetrating and flowing through the tiny separation between the faces to be joined. The liquefied portion immediately in contact with the surfaces of the two parts reacts metallurgically at a molecular level, while the other portion strongly adheres to this substratum, so obtaining an extraordinarily firm, ductile, and seal joints.

The clean up of the parts to be joined is of key importance in the brazing process. In order the filler metal capillary fluidity to be produced the surfaces that will be in contact with the metal in liquid state must be very clean before and during the brazing procedure. For this reason a FLUX is to be used, metallurgical designation for chemical products known as deoxidants.

The ARGENTA FLUX powder, liquid, paste, or gas have been formulated for this purpose.

Once all these considerations are taken, the brazing process turns to be reliable, easy, inexpensive, and safe.

WITH ARGENTA, BRAZING MAKES ITSELF. ARGENTA.

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