knsBAS EN 4258:2025

This document specifies the general organization of metallic material standards for aerospace applications, their links with other types of European standards and their use. It corresponds to level 0 (see 4.2). From the date of publication of this document, specifications for different welding and brazing products can be written in only one standard instead of separated material standards. Already existing material standards for filler metals for welding and for brazing can continue to follow this organization.