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See Chinese contents: GB/T 24523-2020 GB/T 24523-2020: Metallic materials -- Test method for rapid indentation (Brinell type) hardness testing
This Standard specifies the principle, symbols, test equipment, specimens, test procedures, determination of extreme hardness values, factors affecting the accuracy of measurement results, and test reports for rapid indentation (Brinell type) hardness testing of metallic materials. This Standard is applicable to the rapid Brinell type hardness testing on the parts on the production site by the rapid indentation (Brinell type) hardness tester.
