Metallic materials - Vickers hardness test - Part 3: Calibration of reference blocks (ISO 6507-3:2018)

ISO 6507-3:2018 specifies a method for the calibration of reference blocks to be used for the indirect verification of Vickers hardness testing machines, as specified in ISO 6507‑2.
The method is applicable only for indentations with diagonals ≥0,020 mm.

Metallische Werkstoffe - Härteprüfung nach Vickers - Teil 3: Kalibrierung von Härtevergleichsplatten (ISO 6507-3:2018)

Dieses Dokument legt ein Verfahren für die Kalibrierung von Härtevergleichsplatten fest, die bei der indirekten Überprüfung von Härteprüfmaschinen nach Vickers nach ISO 6507 2 verwendet werden.
Das Verfahren ist nur anwendbar für Eindrücke mit Diagonalenlängen ≥ 0,020 mm.

Matériaux métalliques - Essai de dureté Vickers - Partie 3: Étalonnage des blocs de référence (ISO 6507-3:2018)

L'ISO 6507-3:2018 spécifie une méthode pour l'étalonnage des blocs de référence à utiliser pour la vérification indirecte des machines d'essai de dureté Vickers comme spécifiée dans l'ISO 6507‑2.
La méthode s'applique uniquement pour les empreintes avec des diagonales ≥0,020 mm.

Kovinski materiali - Preskus trdote po Vickersu - 3. del: Umerjanje primerjalnih ploščic (ISO 6507-3:2018)

Ta dokument določa metodo za umerjanje primerjalnih ploščic, ki se uporabljajo pri posrednem preverjanju naprav za preskušanje trdote po Vickersu, kot so določene v standardu ISO 6507‑-2.
Ta metoda se uporablja samo za zareze z diagonalami ≥ 0,020 mm.

General Information

Status
Published
Publication Date
06-Mar-2018
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
07-Mar-2018
Completion Date
07-Mar-2018

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SLOVENSKI STANDARD
SIST EN ISO 6507-3:2018
01-julij-2018
1DGRPHãþD
SIST EN ISO 6507-3:2006
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Metallic materials - Vickers hardness test - Part 3: Calibration of reference blocks (ISO

6507-3:2018)
Metallische Werkstoffe - Härteprüfung nach Vickers - Teil 3: Kalibrierung von
Härtevergleichsplatten (ISO 6507-3:2018)

Matériaux métalliques - Essai de dureté Vickers - Partie 3: Étalonnage des blocs de

référence (ISO 6507-3:2018)
Ta slovenski standard je istoveten z: EN ISO 6507-3:2018
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
SIST EN ISO 6507-3:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 6507-3:2018
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SIST EN ISO 6507-3:2018
EN ISO 6507-3
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2018
EUROPÄISCHE NORM
ICS 77.040.10 Supersedes EN ISO 6507-3:2005
English Version
Metallic materials - Vickers hardness test - Part 3:
Calibration of reference blocks (ISO 6507-3:2018)

Matériaux métalliques - Essai de dureté Vickers - Partie Metallische Werkstoffe - Härteprüfung nach Vickers -

3: Étalonnage des blocs de référence (ISO 6507- Teil 3: Kalibrierung von Härtevergleichsplatten (ISO

3:2018) 6507-3:2018)
This European Standard was approved by CEN on 18 January 2018.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6507-3:2018 E

worldwide for CEN national Members.
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SIST EN ISO 6507-3:2018
EN ISO 6507-3:2018 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 6507-3:2018
EN ISO 6507-3:2018 (E)
European foreword

This document (EN ISO 6507-3:2018) has been prepared by Technical Committee ISO/TC 164

“Mechanical testing of metals” in collaboration with Technical Committee ECISS/TC 101 “Test methods

for steel (other than chemical analysis)” the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by September 2018, and conflicting national standards

shall be withdrawn at the latest by September 2018.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 6507-3:2005.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 6507-3:2018 has been approved by CEN as EN ISO 6507-3:2018 without any

modification.
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SIST EN ISO 6507-3:2018
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SIST EN ISO 6507-3:2018
INTERNATIONAL ISO
STANDARD 6507-3
Fourth edition
2018-01
Metallic materials — Vickers
hardness test —
Part 3:
Calibration of reference blocks
Matériaux métalliques — Essai de dureté Vickers —
Partie 3: Étalonnage des blocs de référence
Reference number
ISO 6507-3:2018(E)
ISO 2018
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SIST EN ISO 6507-3:2018
ISO 6507-3:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
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SIST EN ISO 6507-3:2018
ISO 6507-3:2018(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Manufacture of reference blocks ......................................................................................................................................................... 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 Thickness ..................................................................................................................................................................................................... 1

4.3 Test surface area .................................................................................................................................................................................... 1

4.4 Magnetism ......... .......................................................................................................................................................................................... 2

4.5 Flatness and parallelism ................................................................................................................................................................. 2

4.6 Surface roughness ................................................................................................................................................................................ 2

4.7 Prevention of the regrind of the test surface ................................................................................................................ 2

5 Calibration machine .......................................................................................................................................................................................... 2

5.1 General ........................................................................................................................................................................................................... 2

5.2 Direct verification ................................................................................................................................................................................. 2

5.3 Traceability of verification instruments ........................................................................................................................... 2

5.4 Test force ...................................................................................................................................................................................................... 3

5.5 Indenter ......... ................................................................................................................................................................................................ 3

5.6 Diagonal measuring system ......................................................................................................................................................... 4

6 Calibration procedure ..................................................................................................................................................................................... 5

7 Number of indentations ................................................................................................................................................................................ 5

8 Uniformity of hardness .................................................................................................................................................................................. 6

8.1 Relative non-uniformity .................................................................................................................................................................. 6

8.2 Uncertainty of measurement ...................................................................................................................................................... 7

9 Marking .......................................................................................................................................................................................................................... 7

10 Calibration certificate ..................................................................................................................................................................................... 7

11 Validity ............................................................................................................................................................................................................................ 8

Annex A (informative) Uncertainty of the mean hardness value of hardness reference blocks ............9

Annex B (informative) Adjustment of Köhler illumination systems ................................................................................14

Bibliography .............................................................................................................................................................................................................................15

© ISO 2018 – All rights reserved iii
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SIST EN ISO 6507-3:2018
ISO 6507-3:2018(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals,

Subcommittee SC 3, Hardness testing.

This fourth edition cancels and replaces the third edition (ISO 6507-3:2005), which has been technically

revised.
The main changes compared to the previous edition are as follows:

— requirements have been added for the maximum test surface area of the reference block;

— requirements have been revised for the maximum uncertainty of the line intervals on the stage

micrometer;

— requirements for the calibration and verification of the measuring system have been revised per

ISO 6507-2;

— requirements for the uniformity of the reference block hardness have been revised to account for

different numbers of calibration indentations;

— the timing requirements for the approach velocity and the time duration at maximum test force

have been revised to indicate a target time value;
— Annex A has been revised.
A list of all parts in the ISO 6507 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved
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SIST EN ISO 6507-3:2018
INTERNATIONAL STANDARD ISO 6507-3:2018(E)
Metallic materials — Vickers hardness test —
Part 3:
Calibration of reference blocks
1 Scope

This document specifies a method for the calibration of reference blocks to be used for the indirect

verification of Vickers hardness testing machines, as specified in ISO 6507-2.
The method is applicable only for indentations with diagonals ≥0,020 mm.
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 of the referenced document (including any amendments) applies.

ISO 376, Metallic materials — Calibration of force-proving instruments used for the verification of uniaxial

testing machines
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method

ISO 6507-2, Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing

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
4 Manufacture of reference blocks
4.1 General

The block shall be specially manufactured for use as a hardness-reference block using a manufacturing

process that will give the necessary homogeneity, stability of structure, uniformity of surface hardness

and time-dependent stability in hardness.
4.2 Thickness
The thickness of the reference block shall not be less than 5 mm.
4.3 Test surface area
The test surface area of the reference block shall not exceed 40 cm .
© ISO 2018 – All rights reserved 1
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SIST EN ISO 6507-3:2018
ISO 6507-3:2018(E)
4.4 Magnetism

The reference blocks shall be free of magnetism. It is recommended that the manufacturer shall ensure

that the blocks, if made of steel, have been demagnetized at the end of the manufacturing process

(before calibration).
4.5 Flatness and parallelism

The maximum deviation in flatness of the test and support surfaces shall not exceed 0,005 mm. The

maximum error in parallelism shall not exceed 0,010 mm in 50 mm.
4.6 Surface roughness

The test surface shall be free from scratches that interfere with the measurement of the indentations.

[1]

The test surface roughness, R , shall not exceed 0,05 µm. The bottom support surface shall be a finely

ground finish or better.
4.7 Prevention of the regrind of the test surface

To verify that no material has been subsequently removed from the reference block, its thickness at

the time of calibration shall be marked on the reference block to the nearest 0,01 mm or an identifying

mark shall be made on the test surface [see Clause 9 e)].
5 Calibration machine
5.1 General

In addition to fulfilling the general requirements specified in ISO 6507-2, the calibration machine shall

also meet the requirements given in 5.2 to 5.6.

NOTE The criteria specified in this document for the performance of the calibration machine have been

developed and refined over a significant period of time. When determining a specific tolerance that the machine

needs to meet, the uncertainty associated with the use of measuring equipment and/or reference standards has

been incorporated within this tolerance and it would therefore be inappropriate to make any further allowance

for this uncertainty by, for example, reducing the tolerance by the measurement uncertainty. This applies to all

measurements made when performing a direct verification of the calibration machine.

5.2 Direct verification

The calibration machine shall be verified directly at intervals not exceeding 12 months.

Direct verification involves
a) verification of the test force,
b) verification of the indenter,
c) calibration and verification of the diagonal measuring system, and

d) verification of the testing cycle; if this is not possible, at least the force versus time behaviour.

5.3 Traceability of verification instruments

The instruments used for verification and calibration shall be traceable to national standards.

2 © ISO 2018 – All rights reserved
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SIST EN ISO 6507-3:2018
ISO 6507-3:2018(E)
5.4 Test force

Each test force shall be verified at three different positions of the plunger, spaced at approximately

equal increments covering the limits of travel used during testing. At each position, the force shall

be measured three times using an elastic proving device according to ISO 376, class 0,5 or better or

by another method having the same or better accuracy. Each measurement shall agree with the

nominal value to within ±0,2 % for normal hardness, to within ±0,3 % for low-force hardness and to

within ±0,5 % for microhardness.
5.5 Indenter
The indenter shall comply with ISO 6507-2 and meet the following requirements.

a) The four faces of the square-based diamond pyramid shall be highly polished, free from surface

defects and flat within 0,000 3 mm.

b) The angle between the opposite faces of the vertex of the diamond pyramid shall be 136° ± 0,1°.

c) The angle between the axis of the diamond pyramid and the axis of the indenter-holder (normal to

the seating surface) shall be less than 0,3°.

d) The point of the diamond indenter shall be examined with a high-power measuring microscope

or preferably with an interference microscope. If the fo
...

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