Yes Alloy 800HT (UNS N08810 (1)) is listed in ASME B16.5, the forging is B 564 Gr. N08810(1). Page 60.
By the looks of it, i will have to prove the clasification via calculations and have a limited life service.
Hi,
I am working on a filtration vessel that will have an operating temperature of 850˚C. The vessel will be constructed of Alloy 800HT. At this temperature the material will have a limited life service because it is in the creep range.
The flange temperature in ASME B16.5 (2009) for this...