No, it's not reasonably possible, the two have totally different innards.
You can install them on a B6 if you use B12 triples or hone your B6 ones out 2mm (best done my someone with machine shop equipment). You'll also need B12 calipers because the B6 ones won't mate to the B12 forks. Might need the B12 rotors, too... basically, this swap is best done with an entire B12 front end, not just the fork tubes.