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Re: Construction materials
696 has used welded 6063 1/8" wall aluminum box tubing frames for the past two years. 6061 was not available. Anyway, we have had virtually no problems with the 6063 and have only cracked (very minorly, no repair needed) a weld once ever. The 6063 polishes very nicely too.  As with any welding, be prepared for warpage and have a plan to correct it (or prevent it)
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Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
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