... for quenching; for hardening; for annealing; 70KW intermediate frequency induction heating welding brazing, hardening, quenching(1-20KHz) Main features ... , it is good for quiding the design of induction coil and adjusting the capacitance3.Small dimension, light weight, ... radiator and various aluminum products. 70KW intermediate frequency induction heating welding brazing, hardening, quenching(1-20KHz)