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Product Code:SAE J418
Title:Grain Size Determination of Steels (Cancelled May 1999)
Issuing Committee:Metals Test Procedures Committee
Scope:This classification for grain size comprises three sets of comparison charts to be used for determining grain size. These charts are presented in three categories as follows:Plate I - Untwinned grains (flat etch)Plate II - Twinned grains (flat etch)Plate IV - Austenite grains in steel (McQuaid-Ehn test or other test)Table 1 lists a number of materials and the comparison charts that are suggested for use in estimating their grain size by the comparison method.NOTE聴The suggestions in Table 1 are based upon the customary practices in industry. For specimens prepared according to special techniques, the appropriate comparison chart should be selected on a structural appearance basis as described in the Scope.