GB/T 24523-2020 specifies the test method for rapid indentation (Brinell type) hardness of metallic materials, which is suitable for rapid hardness testing of large quantities of parts in production sites. The standard defines the test principle, equipment, procedures, determination of hardness extremes, and test report requirements. The core of the method involves using a rapid indentation (Brinell type) hardness tester equipped with a tungsten carbide alloy ball indenter and an indentation depth measurement device. A specified total test force is applied to press the indenter into the surface of the specimen, and the indentation depth is measured and converted into a Brinell hardness value. This method eliminates the need to measure the indentation diameter, enabling efficient hardness testing and meeting the requirements of rapid testing scenarios, such as inspection after heat treatment furnace discharge.