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Straightening 2024-T42 Aluminum

  1. Nov 29, 2016 #1
    Why is it necessary to complete straightening operations prior to completion of natural aging of 2024-T42 material? I believe the controlling specification says to place parts into a freezer to slow down the aging process if you cannot straighten right away.
    Does this mean that if natural aging takes 96 hours, I can straighten any time within the 96 hours without placing in a freezer?
  2. jcsd
  3. Dec 5, 2016 #2


    Staff: Mentor

  4. Dec 5, 2016 #3


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    It is just a situation of having the metal in the annealed condition for any straightening or other forming operations . As the age hardening process develops the metal gets harder to work and more prone to spring back and cracking .

    Ideally the metal should be worked in the freshly annealed condition . Some small delay may be acceptable but if 96 hours is the time for full hardening to develop then acceptable delay would not usually be more than 1 or 2 hours .

    Freezing to inhibit age hardening is a non preferred process in the manufacture of safety critical components .
    Last edited: Dec 5, 2016
  5. May 24, 2017 #4
    at MCMURDO STATION - the aluminum steps to the buildings sagged and bowed in the worst way. so much for the aluminium associations.( danger will robinson ! )
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