ISO 4545-1:2023

Metallic materials — Knoop hardness test — Part 1: Test method ISO 4545-1:2023

Publication date:   Oct 6, 2023

General information

60.60 Standard published   Oct 6, 2023

ISO

ISO/TC 164/SC 3 Hardness testing

International Standard

77.040.10   Mechanical testing of metals

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Scope

This document specifies the Knoop hardness test method for metallic materials for test forces from 0,009 807 N to 19,613 N.
This document specifies Knoop hardness tests for length of the long diagonal ≥0,020 mm. Using this method to determine the 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.
The Knoop hardness test specified in this document is also applicable for metallic and other inorganic coatings including electrodeposited coatings, autocatalytic coatings, sprayed coatings and anodic coatings on aluminium. This document is applicable to measurements normal to the coated surface and to measurements on cross-sections, provided that the characteristics of the coating (smoothness, thickness, etc.) permit accurate readings of the diagonal of the indentation. This document is not applicable for coatings with thickness less than 0,007 mm when testing normal to the coating surface. This document is not applicable for coatings with thickness less than 0,020 mm when testing a cross-section of the coating. ISO 14577-1 can be used for 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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 4516:2002

WITHDRAWN
ISO 4545-1:2017

WITHDRAWN
ISO 6507-1:2018

NOW

PUBLISHED
ISO 4545-1:2023
60.60 Standard published
Oct 6, 2023