The Murphy Builders Site

Thanks Keith.

kpierson@dcsol.com wrote:

Garry: 2024T3 Alclad is approximetly 30% stronger then
6061T6. Alclad is a thin layer of pure aluminum applied to
each side of the sheet to help inhibit corrosion.
Other suppliers that sell both 6061, and 2024 are Wicks
Aircraft Supply, and Airparts in Kansas City who specialize
in rolled aluminum. All will roll the sheets for shipping up to
.032"

Keith













On 8/23/2008 11:37 AM, wright.garry30@gmail.com wrote to rebel-builders:

-> Its easy to get 2024 sheet around here but not so easy to get 6061.
What
-> are the consequences of mixing the two? If mixing is not much of a
-> problem, what are the differences in using 2024 in terms of avoiding
-> causing problems for oneself?
->
-> Garry




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FWIW, I asked Jeff about using some 2024 when I had ruined some piece
(can't remember....it was many ruins ago) and he said he'd approve it but
didn't reccomend it mostly due to the dissimilar metals and corrosion
potential. I'm thinking lots of chromate and careful installation. Craig

Original Message:
-----------------
From: kpierson@dcsol.com
Date: Sat, 23 Aug 2008 20:41:05 -0800
To: rebel-builders@dcsol.com
Subject: [rebel-builders] RE: 2024 and 6061





Garry: 2024T3 Alclad is approximetly 30% stronger then
6061T6. Alclad is a thin layer of pure aluminum applied to
each side of the sheet to help inhibit corrosion.
Other suppliers that sell both 6061, and 2024 are Wicks
Aircraft Supply, and Airparts in Kansas City who specialize
in rolled aluminum. All will roll the sheets for shipping up to
.032"

Keith













On 8/23/2008 11:37 AM, wright.garry30@gmail.com wrote to rebel-builders:

-> Its easy to get 2024 sheet around here but not so easy to get 6061.
What
-> are the consequences of mixing the two? If mixing is not much of a
-> problem, what are the differences in using 2024 in terms of avoiding
-> causing problems for oneself?
->
-> Garry




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Thanks Craig. That seems to be the consensus for sure.

Garry

snowyrvr@mtaonline.net wrote:
[quote]FWIW, I asked Jeff about using some 2024 when I had ruined some piece
(can't remember....it was many ruins ago) and he said he'd approve it but
didn't reccomend it mostly due to the dissimilar metals and corrosion
potential. I'm thinking lots of chromate and careful installation. Craig

Original Message:
-----------------
From: kpierson@dcsol.com
Date: Sat, 23 Aug 2008 20:41:05 -0800
To: rebel-builders@dcsol.com
Subject: [rebel-builders] RE: 2024 and 6061





Garry: 2024T3 Alclad is approximetly 30% stronger then
6061T6. Alclad is a thin layer of pure aluminum applied to
each side of the sheet to help inhibit corrosion.
Other suppliers that sell both 6061, and 2024 are Wicks
Aircraft Supply, and Airparts in Kansas City who specialize
in rolled aluminum. All will roll the sheets for shipping up to
.032"

Keith













On 8/23/2008 11:37 AM, wright.garry30@gmail.com wrote to rebel-builders:

-> Its easy to get 2024 sheet around here but not so easy to get 6061.
What
-> are the consequences of mixing the two? If mixing is not much of a
-> problem, what are the differences in using 2024 in terms of avoiding
-> causing problems for oneself?
->
-> Garry




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2024T3 Alclad is approximetly 30% stronger then 6061T6.
Because the alloys used to make 2024 is susceptible to corrosion and
needs to be protected. Alclad is a thin layer of pure aluminum applied
to each side of the sheet to help inhibit corrosion. By the way all the
charts for strength and bend radius etc take this into consideration.

Pure Aluminum does not corrode, impurities do. 1100 series aluminum is
used to plate the 2024 sheet metal. In most cases it is about 5% (on
each side) of the total thickness of the sheet of alum. The factory
edges of the sheet are not protected, as well as any cuts nicks and
scratches you make.

The standard protection and easiest is to apply a (zinc) chromate
primer. Of course the environmentalists know what our needs are better
than the engineers of the past did, and it is a very to find primer with
chromates in them now days. However some sales persons will say that
their replacements are just as good.

Chemical conversion coating such as Alodine 1201 (high electrical) or
1500, which has a low electrical resistance, might be a suitable as
protection for most alloys. The chemicals force the alum. to oxidize
and protect the metals.

I hope this is helpful and does not "muddy" the waters!

Yes I am using some 2024 along with the 6061 on my Moose---with
protection.

Most production airplanes are constructed with 2024; many of the home
built planes use 6061.

Dick Wampach SR-108






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I just noticed that the skins and the FUS33 corner wraps of the Rebel
tailcone are 2024T3, so I guess mixing the materials isn't an issue, if
proper corrosion protection is considered.


gx

Dieter Oberbichler
778R

----- Original Message -----
From: <kpierson@dcsol.com>
To: <rebel-builders@dcsol.com>
Sent: Sunday, August 24, 2008 6:41 AM
Subject: [rebel-builders] RE: 2024 and 6061

Garry: 2024T3 Alclad is approximetly 30% stronger then
6061T6. Alclad is a thin layer of pure aluminum applied to
each side of the sheet to help inhibit corrosion.
Other suppliers that sell both 6061, and 2024 are Wicks
Aircraft Supply, and Airparts in Kansas City who specialize
in rolled aluminum. All will roll the sheets for shipping up to
.032"

Keith













On 8/23/2008 11:37 AM, wright.garry30@gmail.com wrote to rebel-builders:

-> Its easy to get 2024 sheet around here but not so easy to get 6061.
What
-> are the consequences of mixing the two? If mixing is not much of a
-> problem, what are the differences in using 2024 in terms of avoiding
-> causing problems for oneself?
->
-> Garry




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