Rationale:
AMS6263N results from a Five-Year Review and update of this specification that revises analytical methods (3.1), macrostructure (3.3.1.1, 3.3.1.2), and hardenability (3.3.3), prohibits unauthorized exceptions (3.6), and revises quality (3.4.2), reporting and marking (4.4.1, 4.4.4, 5.2.1, 8.7).