Introduction - ASTM International

Foreign Words—Use Merriam-Webster's Collegiate Dictionary as a guide to foreign words. Transistor Type—Use n-p-n, p-n-p, n-type, etc. Do not italicize: Letters used to subdivide a categorical classification, such as Method A, Cement B, Class C, Grade D, Type E, Sample F. Metallurgy—A1 point, Ar1, etc. ................
................