ISO 4545-1:2017 PDF

Scope: This document specifies the Knoop hardness test method for metallic materials for test forces from 0,009807 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.

ISO 4545-1:2017 Referenced Document

ISO 14577-1:2015 Metallic materials - Instrumented indentation test for hardness and materials parameters - Part 1: Test method
ISO 18265:2013 Metallic materials.Conversion of hardness values
ISO 23718:2007 Metallic materials - Mechanical testing - Vocabulary
ISO 4516:2002 Metallic and other inorganic coatings - Vickers and Knoop microhardness tests
ISO 4545-2:2017 Metallic materials - Knoop hardness test- Part 2:Verification and calibration of testing machines*， 2017-12-14 Update
ISO 4545-3:2017 Metallic materials - Knoop hardness test- Part 3:Calibration of reference blocks*， 2017-12-14 Update
ISO 4545-4:2017 Metallic materials - Knoop hardness test - Part 4: Table of hardness values

2023 ISO 4545-1:2023 Metallic materials — Knoop hardness test — Part 1: Test method
2017 ISO 4545-1:2017 Metallic materials - Knoop hardness test - Part 1: Test method
2005 ISO 4545-1:2005 Metallic materials - Knoop hardness test - Part 1: Test method