The principle of the Brinell hardness test is that the hardened steel ball is used as the indenter. Almost in all applications, while carrying out this test, carbide balls are used as an indenter. Brinell Hardness Test Procedure. With the Brinell hardness test, a carbide ball is pressed into the material. Suitable steel and copper specimen were selected. The hardness of the specimen will be determined from the Brinell Hardness number. It is pressed into the specimen to make the indent in the specimen by applying load. The workpiece was then raised by a turning handwheel until it contacted the steel ball indenter. Steel ball indenter was inserted properly. the errors. The sample was then placed on the anvil of the testing machine. Then a small ball usually of 10 mm diameter, made of tungsten carbide is used to apply the load of about 3000 kg on the work piece. Rockwell, Vickers, & Brinell Hardness Test and Procedures. Brinell hardness test in perform in such a way that first of all a work piece made of desire material is obtain and is fixed on the plate form of the brinell hardness testing machine. Step 1: The indenter is placed on the given material and a force is applied to the indenter. Appendix X2. An indenter, sufficiently hard so as not to be deformed, is punched into the metal to be tested using a determined force. Load is applied for certain duration and then removed. Brinell Hardness number = Load/ Curved surface area of the indentation. Step 2: Now, this force is applied for 10-15 seconds. The factor 0.102 in the equation is due to the unit “kilopond” or “kilogram-force” (1 kp ≙ 9.807 N), which was used in the past but is no longer permissible today. The full load is normally applied for 10 to 15 seconds in the case of iron and steel and for at least 30 seconds in the case of other metals. This test is similar to the Brinell hardness test similar relationship and eliminates most of . After the force has been removed, the dimension or the depth of the indent left in the material tested is measured. Exact Procedure of Brinell Hardness Test: You might be thinking about which type of indenter is used in this test? Procedure. The Brinell hardness test method consists of indenting the test material with a tungsten carbide ball of either 1, 2.5, 5 or 10 mm diameter by applying a test force of between 1 and 3000 kgf. Advertisement. These samples were ground in order to remove grease or any foreign material. The indentation surface left behind serves as a measure of the indentation resistance! Examples of Procedures for Determining Brinell Hardness Uncertainty. The produced impression is projected onto a focusing screen and the . Figure: Brinell hardness test procedure. 1.5 At the time the Brinell hardness test was developed, the force levels were specified in units of kilograms-force (kgf).
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