Brazing and this type of Welding
When you join two pieces of metal to a third piece of metal that is a filler metal that is molten, you have a technique called brazing. This type of welding is said to be versatile and the joints that are brazed have a very strong tensile strength. One reason to use this method is because it can make the two metals stronger when they are bonded then when they are separate metals.
One of the good points for brazing is that when you have brazed the joints they will repel gas and other liquids so that the metals can resist vibration and they do are not affected with changes in temperature. They can also resist shock.
Also, since the two metals are joined they don’t warp or distort but they are able to keep all their metallurgical properties. You will also notice that because the joints themselves are not melted, they come out very clean and you have a nice finish.