International standards ISO 6892 and JIS Z2241 for tensile testing of metallic materials have been revised with the addition of another test item: strain rate control.

When strain is measured with an extensometer, strain rate control has been added as a test item to the current stress rate control method, in which a load is applied to a material until its yield point is reached. As a result, there will be situations when both stress rate control and strain rate control tensile testing of metallic materials will be required to meet standard revisions.

The Shimadzu Autograph AG-50kNX Precision Universal Tester in figure 1 and the SSG50-10H strain gauge type one-touch extensometer in figure 2 were used for strain rate control and stress rate control tensile testing of metallic samples including cold-rolled steel, austenitic stainless steel, aluminum alloy, and brass, according to ISO 6892. The test specimens, conditions, and results are provided in the tables and charts in figures 3 through figure 7.

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