EN ISO 6507-3:1997

SLOVENSKI STANDARD
01-junij-1998
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Metallic materials - Vickers hardness test - Part 3: Calibration of reference blocks (ISO
6507-3:1997)
Metallische Werkstoffe - Härteprüfung nach Vickers - Teil 3: Kalibrierung von
Härtevergleichsplatten (ISO 6507-3:1997)
Matériaux métalliques - Essai de dureté Vickers - Partie 3: Etalonnage des blocs de
référence (ISO 6507-3:1997)
Ta slovenski standard je istoveten z: EN ISO 6507-3:1997
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 6507-3
Second edition
1997-11-15
Metallic materials — Vickers hardness
test —
Part 3:
Calibration of reference blocks
Matériaux métalliques — Essai de dureté Vickers —
Partie 3: Étalonnage des blocs de référence
A
Reference number
ISO 6507-3:1997(E)
ISO 6507-3:1997(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.
Draft International Standards adopted by the technical committees are circulated to the member bodies
for voting. Publication as an International Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard ISO 6507-3 was prepared by Technical Committee ISO/TC 164, Mechanical testing
of metals, Subcommittee SC 3, Hardness testing.
This second edition of ISO 6507-3 cancels and replaces ISO 640:1984 and ISO 640-2:1993 as follows:
— Combination of the two different International Standards for the calibration of the hardness
reference blocks (ISO 640:1984 and ISO 640-2:1993) into this part of ISO 6507.
— Addition of a new figure 1 for the demonstration of the permissible difference of the sectional
planes of the square form of the indenter.
— Addition of a new table (table 1) for the estimation capability and the maximum permissible error
of the measuring device.
— Changing of the values for the maximum permissible value of non-uniformity of the reference
blocks in table 3.
— Addition of a new clause 9 concerning the validity of the reference blocks.
ISO 6507 consists of the following parts, under the general title Metallic materials — Vickers hardness
test:
— Part 1: Test method
— Part 2: Verification of testing machines
— Part 3: Calibration of reference blocks
©  ISO 1997
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
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Printed in Switzerland
ii
©
INTERNATIONAL STANDARD  ISO ISO 6507-3:1997(E)
Metallic materials — Vickers hardness test —
Part 3:
Calibration of reference blocks
1 Scope
This part of ISO 6507 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.
The force values in this part of ISO 6507 were calculated from kilogram force values. They were
introduced before the SI-system was adopted. It was decided to keep the values based on the old
units for this edition, but for the next revision it will be necessary to consider the advantage of
introducing rounded values of test force and the consequence on the hardness scales.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute
provisions of this part of ISO 6507. At the time of publication, the editions indicated were valid. All
standards are subject to revision, and parties to agreements based on this part of ISO 6507 are
encouraged to investigate the possibility of applying the most recent editions of the standards
indicated below. Members of IEC and ISO maintain registers of currently valid International
Standards.
1)
ISO 376:— , Metallic materials — Calibration of force-proving instruments used for the verification of
uniaxial testing machines.
ISO 468:1982, Surface roughness — Parameters, their values and general rules for specifying
requirements.
ISO 4287:1997, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms,
definitions and surface texture parameters.
ISO 6507-1:1997, Metallic materials — Vickers hardness test — Part 1: Test method.
ISO 6507-2:1997, Metallic materials — Vickers hardness test — Part 2: Verification of testing machines.
____________
1)  To be published. (Revision of ISO 376:1987)
© ISO
ISO 6507-3:1997(E)
3 Manufacture of reference blocks
3.1 The block shall be specially prepared and the attention of the manufacturer is drawn to the need
to use a manufacturing process which will give the necessary homogeneity, stability of structure and
uniformity of surface hardness.
3.2 Each metal block to be calibrated shall be of a thickness not less than 6 mm.
3.3 The reference blocks shall be free of magnetism. It is recommended that the manufacturer shall
ensure that the blocks, if of steel, have been demagnetized at the end of the manufacturing process.
3.4 The maximum deviation in flatness of the test and support surfaces shall not exceed 0,005 mm.
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