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Steel vs. Aluminum enclosures
Old 23rd August 2007
  #1
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A27Hull's Avatar
 

Question Steel vs. Aluminum enclosures

Why do some suggest building with Steel enclosures rather than aluminum?

Other than the cost, is there another reason?

Thanks,

Andrew Hull
Old 23rd August 2007
  #2
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I used in my amps aluminum screens to reflect IR rays from toobs, they also serve as hard ribs, the result is lighter construction to carry from a concert to a concert. Steel is a magnetic material, so it may be used when magnetics feelds needs to be taken in mind. It all depends on physics laws, nobody yet invented some that sir Isaac Newton had labeled.
Old 23rd August 2007
  #3
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Thanks!

So, if the unit in question needed to house a transformer, i.e. power or otherwise, I'd be safer going with steel, to control external/inernal magnetic interference.

Otherwise, for simple summing, or switching, aluminum would be fine.

Thank you again for the reply.
Old 24th August 2007
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Consider this; Mu Metal is used in the High end transformers for its superior magnetic rejection and contains around 15% steel, far better than 100% steel and far more expensive.
Copper wire is used for sheilding and works very good.
Steel is far cheaper than aluminum and 3 times the weight...
I use aluminum on all my rack and supply enclosures.
Sheilding is all about design,layout ect...
Old 25th August 2007
  #5
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thanks JMK!

I am familiar with your work, my boss really likes your pres.

Thank you for clearing that up a little bit, I'm just a noob to this stuff, and trying to walk before I crawl...

I'm taking some formal courses right now, but I'm a looooonnnng way off from understanding a lot of this stuff.

Thanks again for your input, it is very much appreciated.

Andrew Hull
Old 25th August 2007
  #6
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Quote:
Originally Posted by A27Hull View Post
thanks JMK!

I am familiar with your work, my boss really likes your pres.

Thank you for clearing that up a little bit, I'm just a noob to this stuff, and trying to walk before I crawl...

I'm taking some formal courses right now, but I'm a looooonnnng way off from understanding a lot of this stuff.

Thanks again for your input, it is very much appreciated.

Andrew Hull
Who's your boss?
Old 25th August 2007
  #7
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Johnny Sandlin
Old 25th August 2007
  #8
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Tibbon's Avatar
You can drill/rivet alumiunum easier.
Old 25th August 2007
  #9
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ulysses's Avatar
Aluminum is lighter, much easier to machine, and it won't rust even if you leave it unfinished. But it also costs more and won't provide the magnetic shielding that steel does.

Steel is much stronger and heavier for a given thickness, costs less per pound, and provides magnetic shielding advantages. But it's also far more difficult to machine, prone to corrosion and more difficult to apply a professional-looking finish.

In our passive summing device, we use a steel chassis primarily because of the shielding properties and for ruggedness. But we also like that it adds heft to a rather small and light box. It feels good. This chassis is cut with a laser, folded and welded with industrial machines. We don't have to worry about ease of machining. The powdercoated finish protects it from corrosion.

Our first four prototypes were machined by me, and I used aluminum. For DIY projects aluminum is the way to go, absolutely. The ease of machining is by far the highest concern.
Old 25th August 2007
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As far as strength goes depends on what type of aluminum.
7075 is stronger than some steel yet is still 1/3 the weight.
I prefer aluminum for machining over steel any day.
Yes it will not rust...
Old 25th August 2007
  #11
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Quote:
Originally Posted by A27Hull View Post
Johnny Sandlin
Just wondering, Dan Penn bought the 2 channel JM-130.
He lives up in your area as well.
Old 25th August 2007
  #12
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Quote:
Just wondering, Dan Penn
I don't know him, but i'll keep an ear out.

Thanks for the additional info guys!
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