Well, they do work beautifully between Aluminium Drop Forged Brackets to
Stainless Steel Camera Housings,

They _might_ be "Lumiweld" or similar, which are a solder and not a
welding process. They won't work between aluminium and stainless
(simultaneously) either, unless you use a non-standard flux, which is a
little on the hazardous side (fluorides) and the heat control is tricky
too.

There are no electric-arc processes for welding stainless to aluminium.

Oh, and your aluminium isn't "drop forged" either.

Why _do_ you bother posting your rubbish?