Hi guys,
I'm currently dealing with an ASME VIII-1 - 2021 vessel with a design temperature of 649 C.
The material required is stainless steel. So as in ASME II-D - 2021, 304L has max. temp at 649 C while 304 has a G12 note for C>=0.04% for temp. >550 C.
That is kind of conflict, don't you think...