INTERNATIONAL STANDARD ISO 4545-1:2017
Metallic materials — Knoop hardness test —
Part 1:
Test method
ISO 4545 consists of the following parts, under the general title Metallic materials —— Knoop hardness test:
ISO 4545-1:2017, Metallic materials — Knoop hardness test — Part 1: Test method
ISO 4545-2:2017, Metallic materials — Knoop hardness test — Part 2: Verification and calibration of testing machines
ISO 4545-3:2017, Metallic materials — Knoop hardness test — Part 3: Calibration of reference blocks
ISO 4545-4, Metallic materials — Knoop hardness test — Part 4: Table of hardness values
替代情况：替代 ISO 4545-1：2005
Contents
Foreword
1. Scope
2. Normative references
3. Terms and definitions
4. Principle
5. Symbols and designations
6. Testing machine
7. Test piece
8. Procedure
9. Uncertainty of the results
10. Test report
Annex A (normative) Procedure for periodic checking of the testing, diagnal measuring system and the indenter by the user
Annex B (informative) Uncertainty of the measured hardness values
Annex C (informative) Knoop hardness measurement traceability
Annex D (informative) CCM- Working group on hardness
Annex E (informative) Adjustment of Kohler illumination systems
Bibliography
1 Scope
This document 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 ofindentation 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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition ofthe referenced document (including any amendments) applies.
ISO 4545-2 , Metallic materials — Knoop hardness test — Part 2: Verification and calibration oftesting machines
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
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