Aluminium Undertray

What grade/grades of aluminium would be suitable to constructing an undertray/small diffuser, rules permit only steel or ally, so the choice is obvious and counts composites out

I would imagine something in the 5XXX or 6XXX series? but anything more specific

thanks

I think duralumin (2000 series) would be fine.

I wouldnt use 2xxx due to corrosion. 5083 or 6061 (weldable) should be ok

What grade/grades of aluminium would be suitable to constructing an undertray/small diffuser, rules permit only steel or ally, so the choice is obvious and counts composites out

I would imagine something in the 5XXX or 6XXX series? but anything more specific

thanks

2024
5005 5052 5083
6061
7075

With the exception of 7075 and 2024 all are weldable.
The 5005 is easily the most formable with regard to minimum bend radii and possibly the cheapest

Hello Marcus, Tech here can be very good, some smart cookies do some posting, I am sure you will have a bit of valuable input.

Duralumin was used extensively in racing bicycle components (we have moved on since then) generally it has a clear applied to stop the milking.

Cheers Blair.
Don't want to get pinged for an off topic post so I should add that the 5000 series alloys all have good corrosion resistance with 5052 and 5083 being marine grades and excellent for self finish and even better with a polish...
I have a wander around in here from time to time- good to be somewhere with a broader focus.
MS

thanks for the responses guys, 5005 looks like the one to go for - corrosion resistance, weldable and easily formed tick the right boxes although I might get it anodised black anyway

what ever you get cheapest!!!!
depends how u are constructing it and wot for.
if its for a cheap mod to a car, then cheapest is ok, if u wack it u can bend it back!
pop rivet together stuff...
if you are on about a 6mm plate or something for a sump guard, then also cheapest would be ok... or one grade up.... if u explain the situation to a supplier they will spec it for you.
aly suppliers have many grades, and happy to help you out! if they arent then they are poo.!!