EMT is strong enough but is not the right size. It will not fit the stem, brake levers won't fit and grips won't fit. I used some 3/4 " for some underseat handlebars on a recumbent.
I plan to do it. I'm going to put a length of 1/2" inside of the 3/4" and bend them at the same time with conduit benders at work. Then in the center where it will attach to the goose neck I'll use a small piece of split 3/4" to increase to fit. I'll prime and paint. It will be plenty strong.
EMT is designed for only two purposes--to shield wires and to be easy to bend. Very soft mild steel.i think emt would be ok as long as you dont use 1/2 inch....3/4 should be strong enough....i rather see you get mild steel tubing though...you can get it thicker....i never use emt for anything but what it is made for due to it sucking to weld(galvinization and all).....ive bent a whole bunch of emt and can vouch that 3/4 should be plenty strong(depending on the weight your gonna put on it) but id definately recomend using tubing....good luck tell us how it comes out...maybe it would be strong enough....ps handle bars arn't that expensive