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.
For this reason, the result of one type of hardness test converted to readings of another type should carry the notation ____ converted from ____ (for example 352 Brinell converted from Rockwell C-38). Another convenient conversion is that of Brinell hardness to ultimate tensile strength. For quenched and tempered steel, the tensile strength (psi) is about 500 times the Brinell hardness number (provided the strength is not over 200,000 psi).