46 C.F.R. § 54.25-3
The steels listed in UCS-6(b) of Section VIII of the ASME BPVC (incorporated by reference; see § 54.01-1) will be allowed only in Class III pressure vessels (see table 2 to § 54.01-5(b)).
[USCG-2003-16630, 73 FR 65170, Oct. 31, 2008]