... ,normalizing),braze welding,smelting,copper bar High frequency induction heating machine:frequency from20 to 80KHZ Application: all classes of ... stock belowΦ25 through heating,speed faster than silicon controlled, Φ60mm-Φ100mm bar stock through heating 5.chain,chain wheel heat ... ,depth 17.5mm steel tube1000 degree centigrade heating bending. 8.steel tube heating necking down 9. copper bar annealing, ...