ICT is made up of information technology (storage tanks) and communications technology (pipes). Information (stored water) is stored using information technology (storage tanks) and a communication (flowing water) reaches the recipient through communications technology (pipes).
The Brinell hardness test is commonly used to determine the hardness of materials like metals and alloys. The test is achieved by applying a known load to the surface of the tested material through a hardened steel ball of known diameter. The diameter of the resulting permanent impression in the tested metal is measured and the Brinell Hardness Number is calculated as. BHN = 2 P / (Ï D (D - (D2 - d2)1/2)) (1). where.
A Comparable Scale to Rockwell Hardness. The Rockwell scale has been compared to the Brinell scale. The Brinell scale was developed by Swedish engineer Johann A. Brinell in 1910. This scale operates as follows. A load is applied to a hardened steel ball that sits on a flat surface of the metal waiting to be evaluated.