Hi Alex,
Forget welding. Too difficult. Soldering is okay. Use the special flux. I have forgotten the names but I have soldered SS, Al and copper alloys successfully.
Super glue becomes brittle and releases after time.
Araldite, I don't know about. It may not be effective on metals.
Rivets work. In aircraft they use titanium rivets.
Also a special two pack glue for metals is available. It is expensive but I have used it to seal up holes on stainless 7 years ago and it is still holding.
An excellent glue. I acquired info from a guy who owned a SS and Al welding shop.
Hope this helps.