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ASTM Grain-size Number

  1. Nov 7, 2007 #1
    ı have a little problem for this problem i found 2 different answer...

    Question:İf there Are 400 grains per square inch on photomicrigraph of a ceramic material at 200x.What is its ASTM grain-size number...?

    Thanks for your attention....
  2. jcsd
  3. Nov 7, 2007 #2


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  4. Nov 7, 2007 #3
    thnaks for attetion :) its very useful... :D thanks...
  5. Nov 4, 2008 #4
    Hello, I would like to know where can I find a complete chart of ASTM Grain Size numbres. Since the highest number in the chart in E112 is 14.3. And I have a sample whose Grain Number is 19.5.
    Thanks for your help
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