jdm61
itinerant metal pounder
- Joined
- Aug 12, 2005
- Messages
- 47,357
That is my understanding too and I have heard some people say that you don't want to dunk the bad into the liquid. Not sure about that.
According to my friend who works with LN every day, the vapor above the liquid is ~-160. So the vapor alone is enough to convert RA. Formation of ETA carbides requires complete submersion and a long soak.