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Yes, but you'd need an awful lot of blades, and whatever goes into those stainless gilette blades is probably the wrong kind of steel to get dendrite growth. Of course you could probably produce a...

Wouldn't it be dangerous to bring an hermetically clased metal container with air inside, to welding heat?

Mike will probably say the same thing I am going to say: don't bother.

Those things are so thin, that if you bring them to forge welding temperatures, they'll be burnt to crispy scale before you...