National (State Primary) Standard of Hardness Units on the Rockwell and Super-Rockwell Scales

Reproduction of the hardness units on the Rockwell and Super-Rockwell scales and their transfer to the working standards (hardness measures) of the 1st class by means of the method of indirect measurements in accordance with DSTU
3869-99 “Metrology. National verification scheme for measuring instruments of hardness on the Rockwell and Super-Rockwell scales”.

Metrological characteristics

Range

(70-93) HRA, (25-100) HRBW,
(20-67) HRC

(70-94) HR15N, (40-86) HR30N,

(20-78) HR45N, (62-93) HR15TW

(15-82) HR30TW, (10-72) HR45TW

Uncertainty by type A (uA)

0,08 HR

0,16 HR

Uncertainty by type B (uB)

0,11 HR

0,21 HR

 

Total standard uncertainty (uC)

0,13 HR

0,26 HR

Extended uncertainty (U)

0,26 HR

0,52 HR