How much power induction heating furnace is used for heating rods?

Heating diameter 150 bar length 160 heating 36 bars in one hour heating to 1200℃

After calculation, the power of the indukcijska peć za grijanje should be more than 300KW (about 320KW) and the frequency should be below 1KHz. Because the materials are different, the processing applications after heating are different, so the required core-surface temperature difference and the end-to-end temperature difference are also different.