Induction heating is a form of non-contact heating in which the heat is induced electromagnetically instead of by using a heating element. 

Traditionally, induction heating has been used for soldering and brazing and other welding processes, but it is becoming more popular for welding preheating, especially for businesses that conduct a high volume of welding. 

This process has several advantages: 

Lower cost of welding consumables

Improved heat quality

Uniformity

Reliability

Ease of use