Standard Test Methods for Tension Testing of Metallic Materials

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Designation: E8/E8M-08 Standard Test Methods for Tension Testing of Metallic Materials11. Scope*1.1 These test methods cover the tension testing of metallicmaterials in any form at room temperature.specifically，themethods of determination of yield strength. yield point elon-gation,tensile strcngth, clongation, and reduction of arca.1.2 The gage lengths for most round specimens are requiredto be 4D for E 8 and 5D for E 8M.The gage length is the mostsignificant difference between E 8 and E8M Test SpecimensTest specimens made from powder metallurgy (P/M) materiallsare exempt from this requirement by industry-wide agreementto keep the pressing of the material to a specific projected areaand dcnsity.1.3 Exceptions to the provisions of these test methods maynoed to be made in individual specifications or tcst methodis fora particular material. For examples,see Test Methods andDefinitions A 370 and Test Methods B 557,B 557M.1.4 Room temperature shall be considered to be 10 to 38°C[50 to I00F] unless otherwise specified.1.5 The walues stated in sl units are to be regarded asseparate from inch/pound units. The values stated in cachsystem are not exact equivalents; therefore each system must

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