CALIBRATION OF PORTABLE BRINELL HARDNESS TESTERS

• Abstract:

  The paper describes calibration method of portable Brinell hardness testers, which have been manufactured for many years and used popularly in China, especially used in testing hardness of ferrous metals. A series of experiment have been done concerning hardness levels for calibration, thickness of hardness blocks, supports of the blocks, diameters of ball indenters and touch-method between the block and the support. Based on result obtained from tests mentioned above, it is given that specifications of portable Brinell hardness testers including indication error of 7%, repeatability of 4%, etc. Besides that, this paper, also, provide an equation of Brinell values vs indentation diameters based on a table, which could be useful for application of the testers.
• Keywords:

  Brinell hardness relative deviation portable hardness tester
• Download:

  IMEKO-TC5-2004-015.pdf
• DOI:

  _unreg_tc5-2004.015

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