United Service Company Inc

The Brinell hardness test was developed by Dr. A J Brinell around 1905. Using a common test load of either 500 kgf, 1000 kgf, 1500 kgf or 3000 kgf along with various size balls, an impression is made. Due to the high loads and relatively large size of the impression, minimal surface prep is require.  Typically a Brinell test is done on cast parts prior to machining. The impression is measured optically using a Brinell scope and written as HB.