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This article contains a conversion table, which assists in the conversion of ASTM number to average grain intercept length. It also includes a table that lists European and U.S. grit numbers with their approximate particle size for metallographic grinding papers.

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Grit Sizes and Grain Size Conversions, Metallography and Microstructures, Vol 9, ASM Handbook, Edited By George F. Vander Voort, ASM International, 2004, p 1093,

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