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  1. #1
    Schliebe is offline Aluminum
    Join Date
    Mar 2002
    Location
    Scio, Oregon USA
    Posts
    210

    Post

    Does Aluminum plate stock (7075) have a grain direction that is significant enough to make a differance as to which direction a part should be made?

  2. #2
    A286 is offline Junior Member
    Join Date
    May 2005
    Location
    Colorado
    Posts
    14

    Post

    Aluminum plate (thickness >.250 inch) has three grain orientations, each with their own strength values. The three orientations are: the long tranverse (LT), the short transverse (ST) and the longitudinal (L).

    for example: (from MIL-HDBK-5)7075-T62, 2.501-3.000 thick stock, ultimate tension allowable stress is L=67 ksi, LT=70 ksi and ST=66 ksi.

    (edited for spelling)

  3. #3
    winchman is offline Stainless
    Join Date
    Jun 2003
    Location
    Thomasville, GA
    Posts
    1,564

    Post

    This PDF has an explanation of the terminology used in the previous reply.

    http://www-glast.slac.stanford.edu/M...-spec-522b.pdf

    Look at the illustrations on page 11.

    Roger

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