Where Can I Find a Complete Chart of ASTM Grain Size Numbers?

[anthology]

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...

 

[Astronuc]

Would this help?

http://www.metallography.com/grain.htm

I'll see if I have a copy of E112. I've seen the linear intercept method used most frequently.

 

[anthology]

thnaks for attetion :) its very useful... :D thanks...

 

[ffman55]

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