Aluminum 6061-T6 per AMS-QQ-A-250/11 (plate) versus 6061-T6 per ASTM-B221 (extrusion)?
Aluminum 6061-T6 per AMS-QQ-A-250/11 (plate) versus 6061-T6 per ASTM-B221 (extrusion)?
(OP)
What's the difference? I am a machine shop supervisor with a staff of two, that's all, not a rocket scientist nor a metallurgist... please don't judge as I didn't ask for this position! We made a long thin part out of extruded aluminum rather than the plate stock that was defined on the print, assuming the print to be 'wrong'. Now I need to know what effect the difference in material will have on the finished part, especially with regard to potential issues with mechanical resonances. (stole that last line from the query that came to me)
Can someone provide some explanation? (not sure why our design group wasn't tasked with this)
Thanks for your time and patience with me!
CT
Can someone provide some explanation? (not sure why our design group wasn't tasked with this)
Thanks for your time and patience with me!
CT





RE: Aluminum 6061-T6 per AMS-QQ-A-250/11 (plate) versus 6061-T6 per ASTM-B221 (extrusion)?
http://www.eng-tips.com/threadminder.cfm?pid=1529
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RE: Aluminum 6061-T6 per AMS-QQ-A-250/11 (plate) versus 6061-T6 per ASTM-B221 (extrusion)?
RE: Aluminum 6061-T6 per AMS-QQ-A-250/11 (plate) versus 6061-T6 per ASTM-B221 (extrusion)?
First, AMS QQ-A-250/11 has been canceled as of 2008. It has for 6061-T6 been superseded by AMS 4027. My comments only apply to QQ-A-260/11.
Compositions are the the same for both alloys.
However, Mechanical properties are a little different: QQ-A-250 11 specifies 42 ksi minimum tensile strength, 35 ksi minimum yield strength, and 10% minimum elongation (at 0.249" maximum thickness). B221 specifies 38 ksi minimum tensile strength. 35 ksi minimum yield strength and 8% minimum elongation to 0.249" and 10% over 0.249". Also, QQ-A-250 has bend test requirements while B221 does not.
Aaron Tanzer
www.lehightesting.com
RE: Aluminum 6061-T6 per AMS-QQ-A-250/11 (plate) versus 6061-T6 per ASTM-B221 (extrusion)?
Deadeye, I hope you aren't annoyed by my explicit advice but supposed engineers have trouble with this basic advice- don't double post- post a link to your main thread.
Just write:
I have this thread in Metals and Metallurgy Forum.
http://www.eng-tips.com/viewthread.cfm?qid=347488
In this subforum:
http://www.eng-tips.com/threadminder.cfm?pid=281
http://www.eng-tips.com/threadminder.cfm?pid=1529
Use translation assistance for Engineers forum
Note the rules include No Student posting