Note: Brazing a 1/2 in copper tube to a 1 in NPT stainless steel bushing

Objective:

Brazing a 1/2 in copper tube to a 1 in NPT stainless steel bushing

End Product:

stainless steel hex bushing

Equipment:

Ambrell EASYHEAT 2.4 kW induction heating system, equipped with a remote work head containing two 0.66 μF capacitors

Materials:

 Customer supplied bushings, flux and copper 122 tube

Temperature:

1400 °F (760 °C)

Frequency:

240 kHz

Testing:

A custom-designed multi-turn helical coil was built to generate the required heating for the application. Initial tests were conducted to optimize the power delivered to the part. Temperature indicating paint was used to determine the heating pattern and the time to temperature. Heat time for the application is about 45-60 seconds. Samples are being sent for evaluation for testing and visual appearance of the scale buildup

Benefits:

  • Consistent and repeatable results 
  • No flame process
  • Faster process time 
Brazing a 1/2 in copper tube to a 1 in NPT stainless steel bushing

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