Hardness is a crucial indicator for measuring material properties, reflecting a material's ability to resist the indentation of hard objects on its surface. It integrates multiple physical quantities such as elasticity, plasticity, plastic deformation strengthening rate, strength, toughness, and anti - friction performance, providing a comprehensive perspective for material quality assessment. To test this key indicator, a special instrument, the hardness tester, has emerged. Among them, the Brinell hardness tester stands out.
The Brinell hardness measurement method has a significant position in the field of metal hardness testing due to its obvious indentation and accurate and reliable measurement results. Since its establishment by Swedish engineer Johan August Brinell in 1900, it has become one of the most widely used testing methods. The relatively large indentation makes the hardness value less affected by the microscopic segregation of the sample structure and the inhomogeneity of the composition. Therefore, the test results have low dispersion and good reproducibility, objectively reflecting the true hardness of the material. During the test, a certain test force is applied to vertically press a specific - diameter indenter into the sample surface and maintain it for a period of time before unloading. Then, two mutually perpendicular indentation diameters are measured. Using the average value of these diameters and specific calculation formulas or charts, the Brinell hardness value can be obtained.
The Brinell hardness test offers about 25 different combinations of test forces and ball indenters, allowing almost all metals to be tested with specific - sized ball indenters and test forces. As long as the ratio of the ball indenter size to the test force remains constant, the measurement results will theoretically be consistent. In the industrial field, Brinell hardness test results are often used as important criteria for commercial transportation acceptance and quality control. Moreover, the test results are closely related to the ductility, tensile strength, and wear resistance of metals.
Here are some examples of the specific representation methods of Brinell hardness:
The core of the Brinell hardness testing standard is to vertically press the indenter into the sample surface with a specific test force, maintain it for a period of time, and then unload. Subsequently, measure two mutually perpendicular indentation diameters, and obtain the Brinell hardness value through the average value of these diameters and specific calculation formulas or charts. However, due to possible errors in manual measurement and calculation, modern enterprises usually equip Brinell measurement systems to ensure the stability and consistency of data.
The Brinell hardness test is well - known for its significant indentation characteristics among all hardness tests. It uses a relatively large test pressure and a large - diameter indenter, resulting in a large indentation diameter. This characteristic enables Brinell hardness testing to be unaffected by the microscopic segregation of the sample structure and the inhomogeneity of the composition, truly reflecting the comprehensive performance of the material. Therefore, this method is particularly suitable for testing materials with large grains and inhomogeneous structures, such as forged steel, cast iron, and steel after annealing and quenching - tempering treatments, as well as non - ferrous metals and their alloys. It is also applicable to softer metals such as aluminum, copper, lead, tin, zinc, and their alloys. Of course, by using a small - diameter ball indenter, Brinell hardness testing can also be used to measure small - sized and thinner sample materials.
Brinell hardness testing is widely used in many fields, such as metallurgy, forging, power, petroleum machinery, rail vehicles, automobile manufacturing, military equipment, laboratories, colleges and universities, and research institutions. It is commonly used for the hardness determination of materials such as cast iron, steel, non - ferrous metals, and soft alloys.
If you are looking for a reliable Brinell hardness tester for your business needs, don't hesitate to contact us. Our high - quality products and professional services will surely meet your requirements. Click the button below to get in touch with our sales team!
Contact Us Now
