How do SS304 and SS316 fare (esp. 304) when exposed to alkali metal (esp by Sodium vapor or liquid) at high temperautres (say 300-500°C) in N2 atmosphere?
Bet you thought that no one would reply! The problem is that you are asking a very obscure question. I think that it is possible that the sodium may migrate into the alloy along the grain boundaries and render both alloy types weaker. I know that some nuclear reactors use liquid sodium for cooling and that high spec valve stems in auto engines are sodium filled, so there should be some info on the net. I will research my info for you as well.
Actually, on the contrary, I expected a quick reply as I have been reading posts from some really knowledgeable folks in this forum.
Thanks for your reply Fred. I will look up if nuclear reactors use any special grade of steelf or their sodium piping. Would love to hear from you if you have anything more to add.