prBAS EN ISO 4545-1:2025
Metallic materials - Knoop hardness test - Part 1: Test method
General information
Status:Project
Number of pages:32
Adoption method:Proglašavanje
Language:engleski
Edition:3.
Realization date:04.11.2024
Forseen date for next stage code:03.03.2025
Technical committee:BAS/TC 4, Steel, steel products, non-ferrous metals and alloys
ICS:
77.040.10, Mechanical testing of metals
Abstract
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.
Lifecycle
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Original document and degree of correspondence
EN ISO 4545-1:2023, identical
ISO 4545-1:2023, identical
Relation to BAS standards
Work material
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