What is Braze Welding?

Braze welding is a method of welding by using a filler metal, having a liquidus above 840 øF (450 øC) and below the solidus of the base metals. The filler metal is added to the joint between the two pieces to be welded, and the assembly is then heated until the filler metal reaches its liquidus temperature. The molten filler metal wetts the surfaces of the base metals and forms a metallurgical bond with them as it cools and solidifies.

Types of braze welding

The types of metals that can be joined using braze welding include:

steel,
stainless steel,
cast iron,
nickel alloys,
copper,
brass,
aluminum,
and titanium.

Braze welding can also be used to join dissimilar metals, such as steel to aluminum.

What are the Advantages of Braze Welding?

Braze welding has several advantages over other welding processes, including:

It can be used to join metals that are difficult or impossible to weld using other methods.
It can be used to join dissimilar metals.
It is a relatively fast welding process.
It produces strong and reliable welds.
It is a relatively low-cost welding process.

What are the Disadvantages of Braze Welding?

There are also some disadvantages associated with brazing welding, including:

Specialized equipment is required.
The base metals must be clean and free of oxide prior to welding.
The filler metal must be carefully chosen to ensure compatibility with the base metals.
The joint must be designed so that the filler metal can flow into it.
The weld area must be protected from oxidation during cooling.

What is braze welding used for?

Braze welding is commonly used in the following applications:

Automotive industry – to weld automotive body panels, engine components, and exhaust systems.
Aerospace industry – to weld aircraft fuselages and wings.
Medical industry – to weld medical implants and devices.
Consumer goods industry – to weld a variety of consumer products, such as bicycles, lawn mowers, and power tools.

What is the difference between brazing and braze welding?

The main difference between brazing and braze welding is that brazing is used to join two pieces of metal using a filler metal with a melting point above 840 øF (450 øC) while braze welding is used to join two pieces of metal using a filler metal with a liquidus above 840 øF (450 øC) but below the solidus of the base metals.