After examination and signature of the AECMA Standard Checking Centre (NPSI and formal
agreement of the Official Services of the Member countries it will be submitted as a draft
European Standard to CEN (European Committee for Standardization) for formal vote.
AECMA PREN 4436-1997 history
1997AECMA PREN 4436-1997 Aerospace Series Steel Test Methods Determination of d Ferrite Content Edition P 1; SAE AMS 2315D