This "Aerospace series" Standard has been drawn up under the responsibilit of AECMA.
AECMA PREN 2169-1999 history
1999AECMA PREN 2169-1999 Heat Resisting Steel FE-PA91-HT Solution Treated Bars and Sections for Welded Rings Aerospace Series Edition 2 [Refer To: ASD-STAN PREN 4571]
1995AECMA PREN 2169-1995 Aerospace Series Heat Resisting Alloy FE-PA4901 Solution Treated Bars and Sections a or D Less Than or Equal to 100 mm Edition EN
1979AECMA PREN 2169-1979 Heat Resisting Steel FE-PA91-HT Solution Treated Bars and Sections for Welded Rings Aerospace Series Edition 1