4.2.3 Whether solution heat treatment using the hot rolling mill is acceptable (8.3). 4.2.4 Whether bend tests are required (12.1). 4.2.5 Whether testing for stress-corrosion cracking resis-tance of alloy 2124-T851, 2219-T851, or 2219-T87 is required (13.1). 4.2.6 Whether ultrasonic inspection for aerospace or pres-
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