What are the materials that cannot be heated by induction furnace?

The induction heating furnace cannot heat non-magnetic materials such as copper, aluminum, and austenitic stainless steel, nor can it be used to heat workpieces made of insulating materials, because the induction heating furnace is heated by electromagnetic induction, and there is no insulating material. Therefore, the resistance cannot be heated, which means that the induction heating furnace can only heat metal objects.

The principle of induction heating furnace is to generate eddy current by induction heating. It is a physical phenomenon that the heat generated by the closed current melts the metal material.