AMS2772H results from a Five-Year Review and update of this specification with changes to update and clarify purpose (1.1), definitions (2.2), equipment qualification (3.1, 3.1.3), pyrometry (3.2, 3.2.1.2, 3.2.1.3, 3.2.1.4, 3.2.1.4.1), heating media for solution heat treatment (3.3.2), cleanliness (3.4.1), racking and spacing (3.4.2.2, 3.4.2.2.1, 3.4.2.2.2), temperatures (3.5.1.1), solution heat treatment (3.6.1), soaking (3.6.2.3, 3.6.2.4), quenching (3.6.3, 3.6.3.2, 3.6.3.3, 3.6.3.5.1. 3.6.3.7), temper conversion (3.8.1.2), procedure for response-to-heat-treatment tests (3.9), processing to -O1 temper (3.11), procedure for electrical conductivity testing (4.3.2.6), and acceptance criteria (4.3.2.7).