This standard specifies a unified method for determining the tensile strength of dense shaped and unshaped refractory materials at high temperatures. The core principle involves applying a constant tensile rate to dumbbell-shaped specimens until they fracture, thereby calculating the maximum tensile force per unit cross-sectional area that the material can withstand before failure. This serves to evaluate the load-bearing capacity of the material under high-temperature conditions. Conducting this test requires specialized high-temperature mechanical testing equipment, such as a high-temperature mechanical performance integrated tester capable of integrating multiple functions like tension and compression, or a high-temperature universal testing machine equipped with a high-temperature furnace and specialized fixtures. Such equipment enables precise loading and measurement of specimens in a controlled atmosphere at temperatures up to 1800°C.