You use an acetylene torch and special brazing rods.
brazing is joining of two metals by using filler metals.to melts the filler rods only which temperature is above the melting point (>450c).initially flux metal is used to avoid the oxidation ....this process is very strongly than soldering method ...weaker than welding method..
It is called Brazing rods or lead free solder
When Brazing copper to copper flux is normally not needed When brazing steel or copper based alloys then the flux is used to help the wetting action (Better flow of the brazing alloy) and to prevent oxidation A typical rod would be Union Carbide 25 M or check out the AWS booklet
Brazing for hobbies
You should use solder, not brazing. Brazing is used to join iron or steel products together.
brazing clints head
Primarily when brazing cast iron. Nickel rods are available to arc weld cast iron but in most cases it has to be preheated and it takes experience to prevent cracking. Using oxy-acet provides a means to preheat, maintain the temperature, and braze. Welding, brazing, and silver soldering with oxy-acet have become lost arts. Most common metals can be welded with this process including steel and aluminum.
They are used for repairing things made of aluminum. What is needed is a heat source from gas such as propane gas, mapp gas or oxy-acetylene gas. This method makes for stronger welds than conventional Tig welding. It works on aluminum and cast aluminum, pot metal, copper, magnesium and white or porous metals. One of the main benefits of using aluminum arc brazing is that it can be used to weld and repair metal structures and things that are difficult to work on with more conventional welding methods. This includes corroded parts and also areas that have come in contact with oil and fat that make the area difficult to work on using the older methods of aluminum welding rods. The weld produced is stronger and the work quicker using aluminum arc brazing.
The compound, magnesium fluoride, is used in the process of brazing. It helps to smooth out the air particles by using this chemical compound to get rid of the pollutants, which helps with preventing oxide formation.
yes it can although it is not reccomended, if this is your only option preheat the cast iron to almost cherry red and weld with a low hydrogen rod such as 7018
yes there is brazing is done w silver alloy Brazing has a tensile strenght of 87,000 PSI and soldering around 16,000 Brazing filler metals require a melting point of 1,100 DEG Fsoldering around 600 Def F Using the correct type of brazing rod they are self fluxing on copper alloys and thus great for Oxygen and other medical gases and HVAC work