So is there any standard for say run out when a circular sample is reduced in order to ensure that the round sample stayed round? I do not believe that someone with sand paper will be able to perfectly, within say .0001 or less of an inch, reduce a round sample diameter, but the ASTM does state...
ASTM E8, Standard Test Methods for Tension Testing of Metallic Materials, Paragraph 6.6.2.1, Full Cross Section, states that For material not exceeding 5mm in diameter...the cross-sectional area may be reduced to not less than 90% of the original area without changing the shape of the cross...
