I've been online shopping for some 3/16" or 1/4" aluminum but cant seem to find a good rundown on what the type numbers mean. So far I've run across these: 6061, 7075, 8020, 2024, 5052. Anybody here have a clue what these mean? Some of these also seem to have a second set of numbers that I suspect is a finish number of some sort (?). I'm planning on cutting with a TS, drilling holes with a DP and putting some slots in with a router, so if any of these are too hard for that I'd like to know which to stay away from.
Thanks