This standard specifies the terminology, measuring instruments, samples, measurement procedures, measurement results and calculations, test records and reports of the measurement methods for the resistivity of metallic materials. This standard is applicable to the measurement of resistance, resistivity, mass resistivity and resistance per unit length of ferrous metal wire products and other conductive materials, and it is used as the measurement standard for resistivity of 0.01~2.0Ω·mm2/m The quorum measurement method within the range.