EN ISO 6507-3:2005
(Main)Metallic materials - Vickers hardness test - Part 3: Calibration of reference blocks (ISO 6507-3:2005)
Metallic materials - Vickers hardness test - Part 3: Calibration of reference blocks (ISO 6507-3:2005)
ISO 6507-3:2005 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 greater than or equal to 0,020 mm.
Metallische Werkstoffe - Härteprüfung nach Vickers - Teil 3: Kalibrierung von Härtevergleichsplatten (ISO 6507-3:2005)
In diesem Teil von ISO 6507 ist das Verfahren für die Kalibrierung von Härtevergleichsplatten, die bei der indirekten Prüfung von Härteprüfmaschinen nach Vickers nach ISO 6507-2 verwendet werden, festgelegt.
Das Verfahren ist nur anwendbar für Eindrücke mit Diagonalenlängen ³ 0,020 mm.
Matériaux métalliques - Essai de dureté Vickers - Partie 3: Etalonnage des blocs de référence (ISO 6507-3:2005)
L'ISO 6507-3:2005 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 plus grandes que ou égales à 0,020 mm.
Kovinski materiali – Preskus trdote po Vickersu – 3. del: Umerjanje primerjalnih ploščic (ISO 6507-3:2005)
General Information
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Standards Content (Sample)
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Metallic materials - Vickers hardness test - Part 3: Calibration of reference blocks (ISO
6507-3:2005)
Metallische Werkstoffe - Härteprüfung nach Vickers - Teil 3: Kalibrierung von
Härtevergleichsplatten (ISO 6507-3:2005)
Matériaux métalliques - Essai de dureté Vickers - Partie 3: Etalonnage des blocs de
référence (ISO 6507-3:2005)
Ta slovenski standard je istoveten z: EN ISO 6507-3:2005
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.
EUROPEAN STANDARD
EN ISO 6507-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2005
ICS 77.040.10 Supersedes EN ISO 6507-3:1997
English Version
Metallic materials - Vickers hardness test - Part 3: Calibration of
reference blocks (ISO 6507-3:2005)
Matériaux métalliques - Essai de dureté Vickers - Partie 3: Metallische Werkstoffe - Härteprüfung nach Vickers - Teil
Etalonnage des blocs de référence (ISO 6507-3:2005) 3: Kalibrierung von Härtevergleichsplatten (ISO 6507-
3:2005)
This European Standard was approved by CEN on 14 December 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
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Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6507-3:2005: E
worldwide for CEN national Members.
Foreword
This document (EN ISO 6507-3:2005) has been prepared by Technical Committee ISO/TC 164
"Mechanical testing of metals" in collaboration with Technical Committee ECISS/TC 1 "Steel -
Mechanical testing", 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 June 2006, and conflicting national
standards shall be withdrawn at the latest by June 2006.
This document supersedes EN ISO 6507-3:1997.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Endorsement notice
The text of ISO 6507-3:2005 has been approved by CEN as EN ISO 6507-3:2005 without any
modifications.
INTERNATIONAL ISO
STANDARD 6507-3
Third edition
2005-12-15
Metallic materials — Vickers hardness
test —
Part 3:
Calibration of reference blocks
Matériaux métalliques — Essai de dureté Vickers —
Partie 3: Étalonnage des blocs de référence
Reference number
ISO 6507-3:2005(E)
©
ISO 2005
ISO 6507-3:2005(E)
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ii © ISO 2005 – All rights reserved
ISO 6507-3:2005(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Manufacture of reference blocks . 1
4 Calibration machine. 2
5 Calibration procedure. 4
6 Number of indentations. 4
7 Uniformity of hardness. 4
8 Marking . 5
9 Validity . 5
Annex A (informative) Uncertainty of the mean hardness value of hardness-reference blocks . 6
Bibliography . 9
ISO 6507-3:2005(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
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.
ISO 6507-3 was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee
SC 3, Hardness testing.
This third edition cancels and replaces the second edition (ISO 6507-3:1997), which has been technically
revised.
ISO 6507 consists of the following parts, under the general title Metallic materials — Vickers hardness test:
⎯ Part 1: Test method
⎯ Part 2: Verification and calibration of testing machines
⎯ Part 3: Calibration of reference blocks
⎯ Part 4: Tables of hardness values
iv © ISO 2005 – All rights reserved
INTERNATIONAL STANDARD ISO 6507-3:2005(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 W 0,020 mm.
2 Normative references
The following referenced documents are indispensable for the application 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 376:2004, Metallic materials — Calibration of force-proving instruments used for the verification of
uniaxial testing machines
ISO 4287:1997, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms,
definitions and surface texture parameters
ISO 6507-1:2005, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6507-2:2005, Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing
machines
3 Manufacture of reference blocks
3.1 The block shall be specially manufactured for use as a hardness-reference block.
NOTE Attention 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 5 mm.
3.3 The reference blocks shall be free of magnetism. lt is recommended that the manufacturer shall ensure
that the blocks, if made 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. The
maximum error in parallelism shall not exceed 0,010 mm in 50 mm.
3.5 The test surface shall be free from scratches which interfere with the measurement of the indentations.
The surface roughness R shall not exceed 0,000 05 mm for the test surface and 0,000 8 mm for the bottom
a
surface. The sampling length l shall be 0,80 mm (see ISO 4287:1997, 3.1.9).
ISO 6507-3:2005(E)
3.6 To verify that no material has been subsequently removed from the reference block, its thickness at the
time of calibration shall be marked on it, to the nearest 0,01 mm, or an identifying mark shall be made on the
test surface [see 8.1 e)].
4 Calibration machine
4.1 In addition to fulfilling the general requirements specified in ISO 6507-2, the calibration machine shall
also meet the requirements of 4.2 to 4.7.
4.2 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) verification of the measuring device;
d) verification of the testing cycle; if this is not possible, at least the force versus time behaviour.
4.3 The instruments used for verification and calibration shall be traceable to national standards.
4.4 Each test force shall be measured using an elastic proving device (or ISO 376:2004, Class 0.5 or
better), or by another method having the same or better accuracy. This measurement shall agree with the
nominal value to within ± 0,1 % for normal and low-force hardness, and to within ± 0,5 % for microhardness.
4.5 The indenter shall 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°.
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°.
c) The point of the diamond indenter shall be examined with a high-power measuring microscope or
preferably with an interference microscope and, if the four faces do not meet at a point, the line of junction
between opposite faces shall comply with the values in Table 1.
Table 1
Ranges of test force, F Maximum permissible length of the line of junction, a
N mm
F W 49,03
0,001
1,961 u F < 49,03
0,000 5
0,098 07 u F < 1,961
0,000 25
d) It shall be verified that the quadrilateral which would be formed by the intersection of the faces with a
plane perpendicular to the axis of the diamond pyramid has angles of 90° ± 0,2° (see Figure 1).
2 © ISO 2005 – All rights reserved
ISO 6507-3:2005(E)
Figure 1 — Permissible difference of the sectional planes of the square form
4.6 The resolution required of the measuring device depends on the size of the smallest indentation to be
measured.
The scale of the measuring device shall be graduated to permit estimation of the diagonals of the indentation
in accordance with Table 2.
Table 2
Diagonal length, d
Resolution of the measuring device Maximum permissible error
mm
d u 0,040
0,000 1 mm 0,000 2 mm
0,040 < d u 0,200
0,25 % of d 0,5 % of d
d > 0,200 0,000 5 mm 0,000 1 mm
The measuring
...
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