1.1 This standard specifies a method of verification of testing machines for determining Rockwell superficial hardness (scales 15N, 30N, 45N, 15T, 30T and 45T) in accordance with IS : 5072-1988 'Method for Rockwell superficial hardness test (scales 15N, 30N, 45N, 15T, 30T and 45T) (first revision)'.
1.2 It describes a direct verification method for checking the main functions of the machine, and an indirect verification method suitable for overall checking of the machine. The indirect verification method may be used on its own for periodic routine checking of the machine in service.
1.3 If a testing machine is also to be used for other methods of hardness testing, it shall be verified independently for each method.
IS 5073-1988 history
1989IS 5073-1988 Calibration method of Rockwell surface hardness testing machine (scale 15N, 30N, 45N, 15T, 30T and 45T)