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RE: Modulus of Elasticity for Aluminum

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I deal with 6000 series aluminum all the time and have never seen the 
modulus of elasticity vary.  What makes you think it is almost 20 in your 

Ray Minor
Hapco Aluminum poles
From: seaint-seaosc(--nospam--at) [seaint-seaosc(--nospam--at)] on behalf 
of Michel Blangy [mblangy(--nospam--at)] Sent: Friday, August 23, 2013 
12:38 PM To: seaint-seaosc(--nospam--at)
Subject: [SEAINT-SEAOSC] Modulus of Elasticity for Aluminum

Somehow it was engrained in my head that the modulus for Aluminum is
approximately 10 Mpsi, or 1/3 that of steel. Today I came across a batch of
extruded 6000 series aluminum that is almost 20. The mill certs say
everything is hunky dory. My shop guys beg to differ. We typically spec
this type of material to ASTM B221. What gives? Perhaps I've been a bit

Michel Blangy, P.E.
Hermosa Beach, CA

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