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ASTM WK75901
Tensile test specimens with rectangular cross-section and gauge length between 10-15 mm are used in miniature tensile tests of metallic materials. However, there is no ASTM standards for this size. The smallest rectangular cross-section tension test specimen in the ASTM E8/E8M is the Subsize 6 mm Wide with gauge length of 25 mm. This revision specifies a geometry with 12.5 mm gauge length with tensile results comparable to using the larger 25 mm gauge length. Thus, direct comparison of the tensile test results using both gauge lengths can be made.