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AS 1817.3:2026
[Current]Metallic materials - Vickers hardness test, Part 3: Calibration of reference blocks (ISO 6507-3:2018, IDT)
AS 1817.3:2026 identically adopts ISO 6507 3:2018, which specifies a method for the calibration of reference blocks to be used for the indirect verification of Vickers hardness testing machines, as specified in AS 1817.2
Published: 13/02/2026
Pages: 14
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Manufacture of reference blocks
4.1 General
4.2 Thickness
4.3 Test surface area
4.4 Magnetism
4.5 Flatness and parallelism
4.6 Surface roughness
4.7 Prevention of the regrind of the test surface
5 Calibration machine
5.1 General
5.2 Direct verification
5.3 Traceability of verification instruments
5.4 Test force
5.5 Indenter
5.6 Diagonal measuring system
6 Calibration procedure
7 Number of indentations
8 Uniformity of hardness
8.1 Relative non-uniformity
8.2 Uncertainty of measurement
9 Marking
10 Calibration certificate
11 Validity
Annex A
A.1 General
A.2 Direct verification of the hardness-calibration machine
A.2.1 Calibration of the test force
A.2.2 Calibration of the diagonal measuring device
A.2.3 Verification of the indenter
A.2.4 Verification of the test cycle
A.3 Indirect verification of the hardness-calibration machine
A.4 Uncertainty of measurement of hardness reference blocks
Annex B
B.1 General
B.2 Köhler illumination
Bibliography
Cited references in this standard
[Current]
Metallic materials — Calibration of force-proving instruments used for the verification of uniaxial testing machines
[Current]
Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing machines
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