Portable Brinell hardness block quotation

HBWBrinell hardness block standard test block hardness tester standard block Brinell hardness tester

Brinell hardness range:
The range is 8~650HBW
The principle of measuring Brinell hardness is to use a certain size of test force F (N) to press a quenched steel ball or hard alloy ball with a diameter of D (mm) into the surface of the tested metal (Figure 1), maintain it for a specified time, and then remove the test force. Use a reading microscope to measure the average diameter d (mm) of the indentation, and then calculate the Brinell hardness HB value according to the formula, or find the HB value from the prepared Brinell hardness table based on d.

Due to the varying hardness and softness of metal materials, as well as the thickness and size of the tested workpiece, if only one standard test force F and indenter diameter D are used, it may result in discomfort for certain workpieces and materials. Therefore, when conducting Brinell hardness tests in production, it is required to be able to use different sizes of test forces and indenter diameters. The key to obtaining the same Brinell hardness value when using different F and D for the same material depends on the similarity of indentation geometry, which can establish a certain selection relationship between F and D to ensure the invariance of Brinell hardness.
Characteristics: Generally speaking, the smaller the Brinell hardness value, the softer the material, and the larger the indentation diameter; On the contrary, the larger the Brinell hardness value, the harder the material, and the smaller the indentation diameter. The advantages of Brinell hardness measurement are high measurement accuracy, large indentation area, ability to reflect the average hardness of materials over a large range, accurate hardness values, and strong data repeatability.
Application: Brinell hardness measurement method is suitable for cast iron, non-ferrous alloys, various annealed and quenched and tempered steels. It is not suitable for measuring samples or workpieces that are too hard, too small, too thin, and do not allow large indentation on the surface.
According to the national standard (GB231-84), the commonly used ratios of 0.102F/D for Brinell hardness testing are 30, 10, and 2.5. Depending on the type of metal material, the range of sample hardness, and the thickness, the diameter D, test force F, and holding time of the test indenter (steel head) are selected according to the following table (Brinell hardness testing specification).

HBWBrinell hardness block standard test block hardness tester standard block Brinell hardness testerProduct attributes:

Brinell hardness test is one of the indentation hardness tests, and its measured values are represented by HB or BHN. This experiment was originally proposed by Swedish engineer Johan August Brinell (1849-1925) in 1900. Brinell hardness is the first standardized hardness test widely used in engineering and metallurgy. This test method is limited in application due to the large indentation and significant damage to the tested material.