Brinell Hardness

The Brinell hardness of a rock is determined by applying a known load to a hard steel point or ball and
measuring the indentor's penetration into the smooth surface of the rock. The Brinell Hardness Number
(BHN) can be used to predict the penetration or embedment of proppant into a fracture surface as the
closure pressure of the formation applies load to the proppant

http://www.halliburton.com/hes/sap/general/rocklab/brinelle.htm

numbers http://www.tiniusolsen.com/hardness.html

The Brinell Hardness Test utilises a steel sphere, which is usually 10mm in diameter. The sphere is forced into the surface of a material. Then, the diameter of the resulting impression is measured. The corresponding Brinell Hardness Number (BHN) is then calculated as the ratio of the applied load to the area of the indentation produced.

http://home1.pacific.net.sg/~greglim/wtech/brinell.htm

<--Back Next-->