BS EN ISO 4545-1:2023

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Metallic materials. Knoop hardness test – Test method

Published By	Publication Date	Number of Pages
BSI	2023	36

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Categories: 77.040.10 - Mechanical testing of metals, BSI

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Description

ISO 4545-1:2017 specifies the Knoop hardness test method for metallic materials for test forces from 0,009 807 N to 19,613 N. The Knoop hardness test is specified in this document for lengths of indentation diagonals ≥0,020 mm. 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. ISO 14577-1 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 ISO 4516.

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PDF Pages	PDF Title
2	undefined
8	4.1 Symbols and designations used in this document 4.2 Designation of hardness number
9	6.1 Testing machine 6.2 Indenter 6.3 Diagonal measuring system
10	7.1 Test surface 7.2 Preparation 7.3 Thickness 7.4 Support of unstable test pieces 7.5 Metallic and other inorganic coatings
11	8.1 Test temperature 8.2 Test force 8.3 Periodic verification 8.4 Test piece support 8.5 Focus on test surface
12	8.6 Test force application 8.7 Prevention of the effect of shock or vibration 8.8 Minimum distance between adjacent indentations
13	8.9 Measurement of diagonal length 8.10 Calculation of hardness value

Additional information

Status	Definitive
Pages	36
Publication Date	2023-10-17
ISBN	978 0 539 19689 4
Standard Number	BS EN ISO 4545-1:2023
Title	Metallic materials. Knoop hardness test – Test method
Identical National Standard Of	EN ISO 4545-1, ISO 4545-1:2023
Replaces	BS EN ISO 4545-1:2018
Descriptors	Force, Hardness measurement, Hardness testing, Testing conditions, Error correction, Knoop hardness measurement, Hardness, Test specimens, Metals
Publisher	BSI
Committee	ISE/101/5
ICS Codes	77.040.10 - Mechanical testing of metals

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BS EN ISO 4545-1:2023

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