AMS5571K is the result of a Five-Year Review and update of the specification. The revision includes updates in composition testing and reporting (3.1, 3.1.1), adds passivation requirements and clarifies other finishing operations (3.2, 3.3), adds tensile test requirements (Table 2, 3.4.1.1), updates intergranular testing requirements to align with other similar standards (3.4.3, 4.2), adds inspection requirements consistent with other similar standards (3.5.1, 3.5.2, 4.2.1, and 4.4), clarifies applicable requirements (3.6, 5.2), requires reporting of country of origin (4.4), prohibits unauthorized exceptions (3.7, 4.4.1, 6.2.1, and 8.4), and allows the use of prior revisions (8.3).