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Re: Steel Yield Strength, A36 vs A 572

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>RE: Steel Yield Strength, A36 vs A 572Does anyone know where I can access 
>design data on screws into aluminum alloys?
Check the ASTM specs for the yield strengths--there are various grades of 
A-572. The best place to go for screws into aluminum is the Aluminum 
Association structural spec, available from the AA web site. It's very 
comprehensive. You really should be very careful threding aluminum. It's 
a lot softer than steel, and tapped holes are easy to strip. Threaded 
inserts like helicoils are a good idea. Watch the clamping load if you're 
using through bolts because the aluminum will crush and your pre-load 
will go away.

Christopher Wright P.E.    |"They couldn't hit an elephant from
chrisw(--nospam--at)        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)