GFN has various meanings in the Foundry category. Discover the full forms, definitions, and usage contexts of GFN in Foundry.
A system developed by AFS for rapidly expressing the average grain size of a given sand. It approximates the number of meshes per inch of that sieve that would just pass the sample if its grains of uniform size. It is approximately proportional to the surface area per unit of weight of sand, exclusive of clay.
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