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From: matt on 3 Feb 2006 15:02
In article <bnOEf.1067$UF1.495(a)newsread3.news.pas.earthlink.net>,
rm(a)nospam.com says...
> "Brian" <brianh.castrate.all.spammers(a)slp.cc> wrote in message
> news:1138992770_19877(a)sp6iad.superfeed.net...
> > Actually SW is not specifying the material condition of the alloy.
>
> Huh? Can you elaborate?


heat treat / temper
From: Brian on 3 Feb 2006 15:06
The number after the "-" represents temper resulting from an artificial
aging process. The aging increases strength and reduces ductility. T6 is
commonly used for structural items that require machining, and "O" (
basically dead soft) is common in sheet metal where forming is required (
post forming heat treating can bring "O" condition material to T6
strength ). 6061 aluminum can also be found in T2,4,8 and 9 but these are
rare and its unlikely that you'll ever see any.

"remy martin" <rm(a)nospam.com> wrote in message
news:bnOEf.1067$UF1.495(a)newsread3.news.pas.earthlink.net...
> "Brian" <brianh.castrate.all.spammers(a)slp.cc> wrote in message
> news:1138992770_19877(a)sp6iad.superfeed.net...
>> Actually SW is not specifying the material condition of the alloy.
>
> Huh? Can you elaborate?
>



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From: remy martin on 3 Feb 2006 15:17
"Brian" <brianh.castrate.all.spammers(a)slp.cc> wrote in message
news:1138997296_5(a)sp6iad.superfeed.net...
> The number after the "-" represents temper resulting from an artificial
> aging process. The aging increases strength and reduces ductility. T6 is
> commonly used for structural items that require machining, and "O" (
> basically dead soft) is common in sheet metal where forming is required
> ( post forming heat treating can bring "O" condition material to T6
> strength ). 6061 aluminum can also be found in T2,4,8 and 9 but these are
> rare and its unlikely that you'll ever see any.


I'm referring to "stock" material as it comes from the mill. It appears
that CosmosExpress/Cosmos use these values (material) for calculating their
analysis's. The value supplied for 6061-T6 in SW is grossly undervalued.
Maybe I'm missing something.



Is the 6061-T6 in SW really a disguise for something else?


From: Brian on 3 Feb 2006 16:18
There is no "6061-T6" in either SW or cosmos express, they only list
"6061". It appears that they are simply using 6061-O as their reference for
6061. If that is the case, their values are correct. Neither cosmos
express or SW allow you to specify material condition. The mill provides
both conditions as "stock", O condition common in sheets (depending on
thickness), and T6 common for bars.

If you are doing stress analysis for 6061-T6 you have two options: use a
different material with similar mechanical properties or create your own
custom material.



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From: remy martin on 3 Feb 2006 16:37
Duh, yes you are correct, thanks. Funny how you can look at something and
see something entirely different from what's really there.


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