Glossary

Base Metal
It basically means the metal or alloy which is going to be brazed.

Blind joint
This particular joint has no visible portion.

Block Brazing
It joins metals by applying heated blocks to the joint using a nonferrous filler metal having a melting point above 800°F (427°C).

Braze Interface
It is a kind of an interface between filler metal and base metal in a brazed joint.

Brazeability
This process allows the material capacity to be brazed under the imposed fabrication conditions, imposed into a specific, suitably designed structure. It performs satisfactorily in the intended service.

Brazement
The assembly components are joined using the brazing procedure.

Brazing
It is a joining process produced by heating an assembly to a predetermined temperature making use of a filler metal having a melting point above 840 °F (450 °C) and below the melting point of the base metals.

Brazing Alloy
Used as a filler metal for brazing, this alloy includes copper alloys and nickel alloys mainly used for steel brazing. It does not melt below red heat. Was known as hard solder formerly.

Butt Joint
Square placement of two abutting surface forming a butt joint.

Carbon-Arc Brazing
When base metals are brazed by heating with an electric arc between a carbon electrode and the workpiece, it is called as carbon-arc brazing.

Clad Brazing Sheet
This metal sheet has one or both sides well clad with brazing filler metal.

Copper Brazing
Generally used to define a brazing process involving a copper filler metal.

Complete Joint Penetration
A kind of brazing filler metal penetration mainly for the full extent of the intended joint.

Diffusion Brazing
It produces a bond of the faying surfaces by heating them to suitable temperatures. Here, with the help of base metal the filler metal is diffused & approaches the properties of the base metal. Other name being transient liquid phase-bonding.

Diffusion Bonding
A joining method, it involves atomic & elemental movement from one metal to another & occurs between solids with the help of heat treatment and pressure.

Dilution
It is actually a kind of chemical compositional change of a brazing filler metal which is caused by the admixture of the base metal or previous brazing filler metal.

Dip Brazing
A soldering process which dips the work into a hot, molten salt or metal bath making use of a non ferrous metal with a melting point above 800°F (427°C).

Flux
A material used to stop oxides & other undesirable substances from forming in molten metal and on solid metal surfaces. It either dissolves or facilitates the removal of such substances.

Filler Metal
Basically available as metal or alloy which are required to be added in making a brazed joint.

Fillet
The workpieces are joined in the radiussed region of brazing filler metal.

Fillet Joint
Designed to have a visible fillet, it is a kind of a brazed joint.

Fit
A kind of joint clearance.

Flow Brazing
Coalescence is produced by heating molten filler metal which is poured over a joint in this kind brazing process.

Freezing Point
A nonstandard term to define liquidus and solidus.

Furnace Brazing
This brazing process makes use of a heated furnace.

Gas-Flame Brazing
A gas flame supplies the required heat. This brazing process is even known as gas brazing.

Gas Generator
A kind of equipment producing a furnace atmosphere.

Hard Solder
Another term for silver-bearing filler metals which is a nonstandard term.

Heat-Affected Zone
A base metal portion having mechanical properties or microstructure which are altered by the brazing heat.

Hydrogen Brazing
Brazing process that takes place in pure hydrogen or a hydrogen containing atmosphere, this term defines this process which has an incomplete fusion. Here, some brazing filler metal in a joint do not melt as well.

Incomplete Joint Penetration
This particular joint penetration is unintentionally less than the joint thickness.

Indistinct Fillet
The brazing filler metal do not result in a fully formed fillet in this condition.

Induction Brazing
Induction brazing is an efficient way to braze a wide variety of conductive materials in a clean & fast manner.

Inert Gas
It defines a gas type which does not react chemically with other materials.

Infrared Brazing
Generation of heat leading to the production of coalescence by infrared radiation is a part of brazing process.

Joint
A joint is a point where a junction of members or the edges of members are either to be bonded or have been bonded.

Joint Clearance
Joint clearance defines the distance between the faying surfaces of a joint. This may vary due to thermal expansion of the workpieces simply because of the workpieces getting heated and cooled.

Lap Joint
The joint actually is a joint between two overlapping members in parallel planes.

Liquidus
Metal or alloy turns into a liquid form at a lowest temperature in this process.

Metallurgy
A part of science actively dealing with the procedures used in extracting metals from their ores, the purification process & alloying metals, thus, creating useful objects from metals.

Oxidization
Oxidization is an oxidizing process where with the loss of electrons leads to an increment in oxygen occurring simultaneously with reduction

Paste Brazing Filler Metal
The paste brazing consists of finely divided brazing filler metal having organic or inorganic flux or neutral vehicle or carrier.

Pin Brazing
A process used to ensure a safe electrical connection to different types of steel structures, this method is applicable for joints used in pipes as well when it is connection to measuring cables, installation of sacrificial anodes, test posts and many other applications.

Post-Braze Heat Treating
This refers to any post brazing heat treatment.

Preform
Fabrication of a brazing filler either in a shape or form for a specific application.

Preheat
In order to maintain preheat temperature, the heat is either applied or substrate to the base metal.

Preheating
Prior to brazing, heat is applied instantly to the base metal.

Quench
It is an accelerated cooling found typically in liquid (oil, water) or inert gas.

Reducing Atmosphere
At an increased temperature, a chemically active protective atmosphere reduces the metal oxides to their metallic state.

Repair Brazing
A kind of rebrazing process where a joint exhibits repairable defects.

Residual Stress
Residual stress present either in a joint member or assembly which is free of external forces or thermal gradients.

Resistance Brazing
This particular brazing procedure employs the heat developed by an electric current where the joint is a part of the electric circuit.

Sandwich Brazing
The brazing defines a process using preplaced shim in a brazed assembly of dissimilar materials apart from the filler metals as a transition layer to minimize thermal stresses.

Semi-Blind Joint
One extremity of the joint is not visible in this joint type.

Silver Alloy Brazing
Defines a brazing procedure using a silver-bearing filler metal.

Silver Brazing
Silver base alloys are used as filler metal in this brazing process.

Simultaneous Brazing
It produces abundant brazed joints simultaneously.

Soldering
A process where two or more metal items are joined through melting and flowing a filler metal into the joint. In this case, the filler metal has a low melting point.

Solidus
The material is turned completely solid here at the highest temperature.

Stress Relief Cracking
As a result of the combined action of residual stresses & post-braze exposure at an increased temperature that an intergranular cracking takes place in the heat-affected zone or filler metal.

Stress Relief Heat Treatment
Defines the even heat treating of a structure or a portion at a temperature sufficient enough to relieve major portion of the residual stresses which is followed by uniform cooling.

Torch Brazing
The required heat in this particular brazing process is furnished by a gas flame.

Undercut
Adjacent to the braze that a groove is melted into the base metal & is left unfilled by filler metal.

Vacuum Brazing
It defines the varied brazing processes taking place in a chamber or retort below atmospheric pressure.

Welding
Welding join metals making use of heat either with pressure or with an intermediate or filler metal having a high melting point.

Wetting
A liquid filler metal or flux is made to spread which adheres in a thin, continuous layer on a solid base metal in this amazing phenomenon.

Workpiece
Workpiece refers to that part which is brazed.