NA 131
DIN Standards Committee Aerospace
DIN EN 4721 [CURRENT] references following documents:
| Document number | Edition | Title |
|---|---|---|
| EN 2043 | 2013-07 | Aerospace series - Metallic materials - General requirements for semi-finished product qualification (excluding forgings and castings) More |
| EN 4050-4 | 2012-09 | Aerospace series - Test method for metallic materials - Ultrasonic inspection of bars, plates, forging stock and forgings - Part 4: Acceptance criteria More |
