aluminium alloys are wee bit different the two high strength ones most folks know about are your 2000 series and 7000 series
does it not have a marking on its length aluminium usually has a black dot etch describing temper and chemical makeup
2000 series are pretty hard to weld 7– series not hard to weld till you hit the 7075 alloys and then thats just using fusion welding there are other ways of welding upper end 7000 series alloys and 2000 series alloys without fusion welding but they are ok strength wise
6061 is like the does lots of stuff aluminium alloy
but it depends like steel what he heat reatment and alloying content are
2000 sounds low on the scale which considering it follows 1000 series its quite a shocker you can make ot quite strong
5000 series is a good un for toughness but in pretty thick sections
if its a CDT or craft tech class you probably know it as he30 in a T6 temper which is a 6000 series alloy if its wrought alloy its pretty hard if its extruded or bar extruded stock it will be a soft aluminium sometimes in what is called O spec but maybe T4 ITS HARD TO TELL UNLESS ITS ON A BENCH IN FRONT OF YOU