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Brazing with Induction Heating

Brazing with induction heating is the ideal joining method. Ambrell has over 10,000 systems installed in over 50 countries, and many of them are brazing application installations. It’s our most common application - used daily, worldwide, in many different industries.

We offer exceptional customer service before and after the sale. Your brazing application will be analyzed and tested in the nearest Ambrell Applications Lab. There is no charge, and you will receive a system recommendation designed to deliver the best possible solution for your brazing requirements. Ambrell delivers the expertise, innovation and system quality to give your company a competitive edge.

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Precision Induction Brazing

Brazing is a process for joining two metals with a filler material that melts, flows and wets the metals’ surfaces at a temperature that is lower than the melting temperature of the two metals. Protection from oxidation of the metal surface and filler material during the joining process is achieved using a covering gas or a flux material. Brazing and silver soldering are terms that usually refer to the joining process where the filler materials have a melt temperature above 400°C (752°F) to create a stronger joint. Read more in our 12-page brochure.


Download 'Precision Induction Brazing'

Poplar Brazing Application Notes

Click to read how induction heating can improve the efficiency, effectiveness and safety of your brazing process.

Brazing a brass tube and flange; torch replacemenBrazing a brass tube and flange; torch replacement

Application engineers determined placing a turn that is targeted to the tube inside the part would optimize heating for this application. This heats the tube while the flange is being heated enabling both parts to achieve the required temperature concurrently.

Brazing a magnetic steel cutting tooBrazing a rectangular steel part

Induction is able to rapidly heat the parts to the required temperature, especially with the EKOHEAT’s Auto Tap feature. The Ambrell Applications Lab used their expertise to create the right solution for the system and the system hardware.

Brazing a copper block and carbide to create a contact shoe assemblyBrazing a copper block and carbide to create a contact shoe assembly

Induction completed the carbide brazing process more rapidly than an oven, delivering heat exactly where it’s needed, operating instant on/instant off 

Brazing a steel and copper strip to carbideBrazing a steel and copper strip to carbide

Heating took less than 30 seconds, is highly repeatable and there is no open flame, clear benefits over flame heating. it a safer method of heating than torch heating

Brazing a copper tubeBrazing a copper tube

The client had been using a torch, which took 50 seconds instead of 30; induction increased repeatability and in turn boosted part quality. Also, there is no open flame which makes it a safer method of heating than torch heating

View more Application Notes


Brazing a rectangular steel part Brazing a carbide to a stainless steel shaft for a digger used in mining
Brazing a copper tube Brazing a small gas delivery assembly used to manufacture needles
Brazing a copper block and carbide to create a contact shoe assembly Brazing copper and steel tube combinations for refrigeration and air conditioning
Heating steel coupons and carbide cutters for brazing and de-brazing Brazing a spray bar assembly used for powder coating
Brazing aluminum adaptors to the end of aluminum tubes Brazing vertical copper bars to a copper slip ring for refurbishing large motor assemblies
Brazing a nickel sleeve to a copper mast Brazing copper cable and block assembly for generator repairs
Brazing a brass screw cap and a steel tube Brazing aluminum electrical lug assembly
Brazing a stainless steel fitting to a stainless steel capillary tube Brazing a carbide cone to a stainless steel shaft for a gripper
Brazing a steel coupler and a steel wire Brazing a copper pivot assembly
Brazing Diamond Drill Inserts Brazing brass faucet assembly
Brazing brass tube and fitting assemblies Brazing a steel piston valve assembly
Brazing carbide tips to a steel cutter Brazing a steel die into a wire drawing guide
Brazing a copper tube assembly Braze a thin walled tube to a steel cap in a hydrogen atmosphere
Brazing a brass tube assembly [valve manufacturing] Braze two positions on a stainless steel manifold simultaneously
Brazing three copper tubes to create a four-way valve Braze a carbide tip to steel cutting tool
Brazing copper tubes to a brass manifold block Braze a mount lead to a ferrule in a PAR light bulb assembly for automobiles
Brazing copper and brass valve assemblies (HVAC) Heat a compacted litz wire bundle for stripping
Brazing steel drill bits (aerospace) Braze electrical contacts to brass and copper bus
Brazing steel flange and shaft assemblies (aerospace and automotive applications) Braze a diamond carbide tip onto band saw blade
Brazing two fittings and a helical tube to create a mount Braze a stainless steel braided hose to copper elbow for flexible hosing
Brazing tubes and fittings for an air conditioning unit for the off-road market Braze an end plug on a stainless steel car grill
Brazing a steel and brass immersion heating element Brazing joint on pressurized heater connectors
Brazing an aluminum assembly for a bicycle manufacturing application Brazing steel mold for golf ball dimple insert
Brazing a magnetic steel tube and steel mating assembly Heat aluminum for brazing an automotive assembly
Brazing an aluminum manifold for an conditioning industry application Brazing stainless steel orthodontic begg brackets
Brazing a steel tube and fitting to create an automotive valve Brazing automotive tube assemblies
Brazing a carbide ball to a spring to create a part that controls the armature position in a motor Brazing carbide teeth to steel pipe jaw section
Brazing a steel rod and sensor housing assembly Braze a refrigeration tube coil assembly
Heat a steel block with a cutout for carbide for a brazing application Brazing stainless steel tree injector
Brazing a copper elbow tube assembly Braze four copper bus bars together
Brazing copper tubing and brass fittings for aerospace parts Brazing a carbide and steel shank for a plug guage
Brazing a steel tube and fitting assembly Braze steel O-ring Face Seal fittings to a steel tube
Brazing two medical tool parts into a coupling Steel-carbide brazing cutting tool
Brazing steel tube fittings Brazing carbide to steel for a surgical device
Brazing a magnetic steel rotor assembly Brazing a Plumbing Union in Tight Quarters
Brazing carbide insert to steel pipe gripper chuck Brazing a Brass Trap Block
Brazing a copper pipe assembly seam Brazing Faucet Components, Assemblies
Brazing a pressure switch base assembly Brazing Brass Fitting to Copper Tube
Brazing brass and steel for valves and end plugs Brazing Carbide Tips to a Meat Cutter
Brazing temperature sensor assemblies Brazing Copper Fittings to Refrigeration Valve
Brazing Copper Tubes to a Braided Stainless Steel Hose Brazing a Cutting Tool Assembly
Brazing two aluminum pipes to an aluminum evaporator core Brazing a brass tube and flange; torch replacement
Brazing brass bellow assemblies for pneumatic regulators Brazing a magnetic steel cutting tool
  Brazing a steel and copper strip to carbide
  Brazing carbide rotary file to high speed steel shanks
  Brochure: Precision Induction Brazing


Brazing is a heating process in which two or more like or unlike materials are joined together by means of another metal alloy with a lower melting point. Braze joints can be made exceptionally strong, sometimes stronger than the two metals being joined. (The term 'silver soldering' is sometimes used to refer to silver brazing.)

Braze joints are liquid- and gas-tight, can withstand shock and vibration, are unaffected by normal temperature changes, provide good electrical conductivity and can be easily plated using conventional processes. Typical brazing temperatures vary between 426 °C - 1177 °C (800 °F and 2150 °F).

Modern induction heating provides reliable, repeatable, non-contact and energy-efficient heat in a minimal amount of time without flame. Solid state systems are capable of heating very small areas within precise production tolerances, without disturbing individual metallurgical characteristics. For larger volume applications and/or quality-dependent processes, parts can be brazed with induction under a controlled atmosphere without flux or any additional cleaning steps.Typical induction power supplies for brazing range from 1 to 20 kW, depending on the parts and application requirements.

Braze: The alloy can be in paste, preform or stick form, depending on the application. A wire preform is generally preferred because it ensures uniform distribution and promotes joint-to-joint consistency. Different braze alloys have different heating characteristics; silver is frequently used for brazing because of its low melting point. Silver-copper eutectic brazes have melting temperatures between 599 °C - 899 °C (1100 °F and 1650 °F). Aluminum braze, the least common, has a melting temperature of 565 °C - 615 °C (1050 °F to 1140 °F). Copper braze, the least expensive, has a melting temperature of 704 °C - 1177 °C (1300 °F to 2150 °F).

Flux: The functions of flux are to dissolve the oxides formed during the heating process, shield the alloy and joint from oxidation, provide clean surfaces to promote even spreading of the alloy, and to promote alloy flow by capillary actiona phenomenon associated with surface tension and resulting in the elevation or depression of liquids in capillaries . There are many different types of fluxes available for use at different temperature ranges. Black flux is used for high temperatures (up to 982 °C or 1800 °F) and is good for steel brazing. White flux is most often used for lower temperature (593 °C - 815 °C or 1100 °F - 1500 °F) applications. Ideally, the flux should have a lower melting point than the base metal, and should be entirely liquid before the braze alloy melts.

Heat source: Fast, precise induction heat works best.