This text of this standard, which exists in three equivalent versions has been drawn up under the responsibility of AECMA and has been cirulated to Official Services.
AECMA PREN 2238-1979 history
1999AECMA PREN 2238-1999 Heat Resisting Steel FE-PA91-HT Solution Treated and Precipitation Treated Bars Aerospace Series Edition 2; Supersedes Edition 1: January 1979 [Refer To: ASD-STAN PREN 4263, ASD-STAN PREN 4571]
1979AECMA PREN 2238-1979 Heat Resisting Steel FE-PA91-HT Solution Treated and Precipitation Treated Bars Aerospace Series Edition 1