The tensile interface allows the operator to enter your desired tensile specimen size or to select a common size from our ASTM, ISO, DIN and JIS library. Stacking capabilities allow the TensileMill CNC to machine multiple specimens at one time for the quickest tensile test sample preparation in the industry. Aug 03, 2019 · AHM E8/E8M – 13a. G–Gauge length. Dimensions, mm [in.] For Test Specimens with Gauge Length Four times the Diameter (E8]. Standard. Small-Size. Buy ASTM E 8/E8M: A TEST METHODS FOR TENSION TESTING OF METALLIC MATERIALS from SAI Global.