BS EN ISO 4545-1:2018
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Metallic materials. Knoop hardness test Test method
Hardcopy , PDF
17-10-2023
English
19-03-2018
This document specifies the Knoop hardness test method for metallic materials for test forces from 0,009 807N to 19,613N.
The Knoop hardness test is specified in this document for lengths of indentation diagonals ≥0,020mm. Using this method to determine Knoop hardness from smaller indentations is outside the scope of this document as results would suffer from large uncertainties due to the limitations of optical measurement and imperfections in tip geometry. ISO14577-1 allows the determination of hardness from smaller indentations.
A periodic verification method is specified for routine checking of the testing machine in service by the user.
Special considerations for Knoop testing of metallic coatings can be found in ISO4516.
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