Originally Posted by Red_Chili
Alum to steel? Well, if GM says it, it can be done. I think he is volunteering... I'd bet the alum would fracture at the braze though.
it won't be that strong, and won't really stand up to hf vibrations. almost like soldering, as you would have to use a low tensile rod.
Better would be to tig on some feet to bolt the railings down with.