GB/T 231.1-2009

This standard specifies the method for conducting Brinell hardness tests on metallic materials, defining the test principle, indenter specifications, test force application, and measurement procedures. It is applied in quality control and material verification across industries such as automotive, aerospace, and construction, where engineers and procurement professionals use it to ensure consistent hardness testing of raw materials, semi-finished parts, and finished components. The standard is particularly relevant for testing metals with coarse or non-uniform grain structures, such as castings and forgings, in laboratory and production floor environments.