The Brinell hardness tester RAB-250 measures the indentation hardness of a material by penetrating a spherical indenter. It consists of the main screw, dial gauge and a loading system. The loading system comes with leavers, hydraulic dashpot, weights and plunger arrangement. This test was first discovered by a Swedish engineer who needed to find a method to control the hardness and quality of steel in the late 1800s. There is a large variety of hardness testers, which can all be used to determine the accurate hardness value of various materials, including plastic, metal, small and large precision parts. Whether you need a large-scale floor-mounted tester, a dedicated tester or a bench mounted one, the market has it all.
When to Use the Brinell Hardness Test Method
The Brinell hardness tester is mostly used to test materials with a course structure or those with rough surfaces such as forgings and castings. The method is defined in ASTM E10. This method employs a high test load of between 500 and 3000 kgf alongside a 10mm diameter indenter. Although there are testers with a load of less than 1kgf and 1mm diameter, they are less frequently used. The Brinell hardness testing method, divided into HB30, HB10, HB5 and HB2.5 categories, is the best for anyone looking to achieve the macro or bulk-hardness of materials, especially those with a heterogeneous structure. Each of these categories is suitable for different materials. HB30 is recommended for steel/iron, while HB10, HB5 and HB2.5 are ideal for light metals. When choosing a testing method, the microstructure, such as the homogeneity of the material, must be factored in.