1999PREN 2170-1999 Heat Resisting Steel FE-PA91-HT Solution Treated Sheets and Strips a Less Than or Equal to 3 mm Aerospace Series (Edition 2)
1995PREN 2170-1995 Aerospace Series Heat Resisting Steel FE-PA4901 Solution Treated and Descaled Sheet and Strip a Less Than or Equal to 3 mm (Edition EN)
1980PREN 2170-1980 Heat Resisting Steel FE-PA91-HT Solution Treated Sheets and Strips a Less Than or Equal to 3 mm Aerospace Series (Edition 1)