Aluminum 5754 any good?

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Aluminum 5754 any good?

Postby footswitch » Thu Apr 02, 2015 11:53 am

Hi there,

A local supplier has permanent stock of 5754 Aluminium plates (largest possible dimensions: 2x1 meters, thickness: 0.5-20.0mm).

Anyone with experience to tell if it's worth a try?
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Re: Aluminum 5754 any good?

Postby jacob32123 » Thu Apr 02, 2015 8:23 pm

WillAdams wrote:Judging from what I've found for the wiki the whole 5xxx series seems difficult to machine.

http://www.shapeoko.com/wiki/index.php/ ... #Aluminium

This page doesn't bode well: http://www.usinage.com/en/pj-categs/aluminium-en/

Machining Costs --- €€€

Alu 5754: Very low stress tolerance (220 MPa). Very good weldability, high corrosion resistance. Great swaging and bending with H111 temper.


I haven't tried 5754, but I have done parts in 5052 for my Ord Bot (at 500mm/min, .3mm per pass with a 1 flute 1/8 carbide endmill, at speed 3 on a DW611) with excellent results.
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Re: Aluminum 5754 any good?

Postby Gadgetman! » Thu Apr 02, 2015 9:17 pm

Note that that usinage page also lists 6082 as '€€€' in machining, but we know that that's one of the easier alloys to machine on a ShapeOko.

See if you can get a couple of scraps to test on. And report back, of course.
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Re: Aluminum 5754 any good?

Postby footswitch » Wed Apr 08, 2015 1:23 am

Hi again,

I decided not to go forward with this experiment (EDIT: see the post below), because the alloys they have - 5083 and 5754 - both come in H111 temper. This is just slightly work hardened (as stated in the AALCO website), which is almost identical to no tempering at all.
H111 is too soft. The values on Tensile Strength, Elongation % [before break] and Hardness, are just too far apart from the well known 6061/6082 T6.

From my research, they would seem fairly machinable (although not great) with the following tempers:
Aluminum alloy 5083 (untested): H32/H323, H116/H321, H112, H34/H343
Aluminum alloy 5754 (also untested): H22/H26

Following this research I contacted Aluminium Warehouse (UK), they have a special alloy named EcoCast (Eco comes from self-announced lower machining costs; the plate itself is more expensive than 6082), which is aluminum alloy 5080P as stated in their e-mail response (no clue on what the letter 'P' means).

AALCO has the following machinability observations on their site and/or documentation/technical sheets:
5083 O/H111/H32 - poor
5754 H22/H26 - average (H26 would be more machinable than H22)
5052 H32 - acceptable (which goes in line with jacob32123's observation)
6061 T6 - acceptable
6082 T6/T651 - good
Alimex ACP (Aluminum Cast Plate) 5080/5080R - very good (HSC/HPS excellent)
Now I can't figure out why they would rate 5080/5080R that good, when the technical sheet specifically says it's the 5083 alloy. But, as mentioned above, Aluminium Warehouse says the same.

Sorry to disappoint otherwise!
Last edited by footswitch on Fri Apr 10, 2015 5:10 pm, edited 2 times in total.
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Re: Aluminum 5754 any good?

Postby footswitch » Fri Apr 10, 2015 5:07 pm

Guys...
After long late night discussions and talking with no less than 24 people from 21 companies...
I'm going forward with the allegedly less machinable alloy, 5083 H111. This is not a drill. (sorry for the pun)
It's crazy the disparity of opinions I've heard. I have to see for myself.
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Re: Aluminum 5754 any good?

Postby MeanderBolt » Fri Apr 10, 2015 5:41 pm

Sometimes, that is the best, and only way to gain an opinion.

Forums are a blessing and a curse for all the same reasons, so many people and experiences. But you have to sift through the info and find the nuggets, while discarding the garbage. The worst ones, are the "While I haven't tried this, I think..." or the cousin to it "While I haven't tried it, I've heard..."

Go for it. The deal is, you might find something that works for you. While I don't like to do this, I needed some aluminum pieces and all I could get at the time was some stuff from the local hardware store. After a few experiments, I found the right speed and made some really nice parts. This aluminum is sort of frowned upon, but in a pinch, it worked.

Just keep good notes for later on so you remember what you did to make it work 8-) .
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Re: Aluminum 5754 any good?

Postby AnonymousPerson » Sun Oct 04, 2015 11:21 pm

footswitch wrote:I'm going forward with the allegedly less machinable alloy, 5083 H111.

How did this go? Interested in hearing your opinions of the result. :)
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Re: Aluminum 5754 any good?

Postby footswitch » Mon Oct 05, 2015 10:22 am

AnonymousPerson wrote:How did this go? Interested in hearing your opinions of the result. :)

Hi, I lent the electronics for an arts project, and this was before completing the mechanical assembly of my eShapeoko :(

But the Aluminum is sitting right here, waiting. I'll see if I can post a photo of its surface later today. It's interesting. It must be related to the mechanical hardening process.
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