On Tue, 26 Apr 2016, Michael Moser wrote:
The bigger issue is the one Ben mentioned: make sure the materials are
okay for cryo use. In particular, ordinary steel is flat out unacceptable
for anything that *might* get cryo cold, because it goes brittle. Brass,
bronze, stainless, nickel alloys are all generally okay.
Careful with blanket statements about "stainless". The austenitic varieties (e.g. 304 & 316) generally don't have a brittle transition. However, ferritic, martensitic and duplex stainless steels generally _do_ have a brittle transition.
They are generally better than carbon steels in that regard, but...
