BS EN ISO 6506-1-2014 pdf download.Metallic materials – Brinell hardness test Part 1: Test method.
5 Apparatus
5.1 Testing machine, capable of applying a predetermined test force or test forces within the range of
9,807 N to 29,42 kN, in accordance with ISO 6506-2.
5.2 Indenter, a polished tungsten carbide composite ball, as specified in Iso 6506-2.
5.3 Indentation diameter measuring system, as specified in ISO 6506-2.
6 Test piece
6.1 The test shall be carried out on a surface which is smooth and even; free from oxide scale, foreign matter, and, in particular, free from lubricants. The test piece shall have a surface finish that will allow an accurate measurement of the diameter of the indentation.
NOTE For indentations made with the smaller ball indenters, it might be necessary to polish or lap the surface prior to making the indentation.
6.2 Preparation shall be carried out in such a way that any alteration of the surface, for example, due to excessive heating or cold-working, is minimized.
6.3 The thickness of the test piece shall be at least eight times the depth of indentation. Values for the minimum thickness of the test piece in relation to the mean diameter of indentation are given in Annex B. Visible deformation at the back of the test piece can indicate that the test piece is too thin.
7 Procedure
7.1 In general, the test should be carried out at ambient temperature within the limits of 10 °C to 35 °C.
However, because temperature variation can affect the results, users of the Brinell test can choose to control the temperature within a tighter range, such as 23°C 5°C.
7.2 Before performing any tests, confirm that verification has been performed in accordance with Annex A.
7.3 The test forces given in Table 2 shall be used. Other test forces and force-diameter indices can be used by special agreement.BS EN ISO 6506-1 pdf download.