JIS Z 2244:2009 PDF

Scope: This Standard specifies the Vickers hardness test method, for the three different ranges of test force for metallic materials (see table 1). Table 1 Ranges of test force The Vickers hardness test is specified in this Standard for lengths of indentation di- agonals between 0.020 mm and 1.400 mm. The Vickers hardness test for lengths of indentation diagonals less than 0.020 mm and the test force of less than 98.07 mN, however, may be in accordance with this Standard upon the agreement between the purchaser and the supplier. For specific materials and/or products, particular Japanese Industrial Standards ex- ist. NOTE 1 : For indentation diagonals less than 0.020 mm, the increase of the uncertainty has to be considered. 2 : In general, decreasing the test force increases the scatter of results of the measurements. This is particularly true for low-force Vickers hardness tests and Vickers microhardness tests, where the principal limitation will arise in the measurement of the diagonals of the in- dentation. For Vickers microhardness, the accuracy of determination of the mean diagonal length is unlikely to be better than ± 0.001 mm.

JIS Z 2244:2009 Referenced Document

JIS B 7725 Vickers hardness test -- Verification and calibration of testing machines*， 2020-12-21 Update