To Edstainless:
I believe the 21-6-9 CRES tubes are passivated. These are aerospace quality tubing.
The same "unaged" tube assembly components and tubing were burst tested to failure and passed min required psi.
The "aged salt-spray-tested" tube assembly failed aprox 33% short of the required...
I have a 21-6-9 stainless steel (CRES) hydraulic tube connected to a 6al-4v titanium fitting that is subjected to a 56-day salt spray test per RTCA/DO-160_Sect 14. Should the CRES tube connection be showing "rust" at the contact/interface (for CRES and titan)? Also, the connection has apparently...
