AISC 13th has this information, and you can find more at their website in the HSS section of their publications. You can also go directly to the main source at the CIDECT website.
I am trying to investigate the flange prying action of a 6061-T6 I8X6.18 beam caused by a girder suspension clamp.
This I can do with a steel beam, but that assumes plastic hinges can form. The problem is that the Alumiunm Association has yet to establish criteria for classifying sections...