This standard specifies the method for determining the conductivity of liquid metals using the DC four-probe method, which is suitable for measurement in the range of room temperature to 300 ° C. The standard describes the test principle, equipment requirements and test process in detail, ensuring the accuracy and repeatability of the results. The method is based on Ohm's law and calculates the conductivity of liquid metals by measuring the voltage drop of liquid metals at a constant current. The standard provides important technical support for the electrical performance evaluation of liquid metals and is suitable for research and industrial applications.