SIST EN ISO 6507-1:2006
(Main)Metallic materials - Vickers hardness test - Part 1: Test method (ISO 6507-1:2005)
Metallic materials - Vickers hardness test - Part 1: Test method (ISO 6507-1:2005)
This part of ISO 6507 specifies the method of Vickers hardness test for the three different ranges of test force for metallic materials.
Metallische Werkstoffe - Härteprüfung nach Vickers - Teil 1: Prüfverfahren (ISO 6507-1:2005)
In diesem Teil von IS0 6507 ist das Verfahren für die Härteprüfung nach Vickers für metallische Werkstoffe festgelegt. Die Härteprüfung nach Vickers ist in Abhängigkeit von der angewendeten Prüfkraft in drei Bereiche eingeteilt (siehe Tabelle 1).
Tabelle 1 — Bereiche der Prüfkraft
Bereiche der Prüfkraft, FN Härtesymbol Bezeichnung
F 3 49,03 3 HV 5 Vickers-Härteprüfung
1,961 L F < 49,03 HV 0,2 bis < HV 5 Vickers-Kleinkrafthärteprüfung
0,098 07 L F < 1,961 HV 0,01 bis < HV 0,2 Vickers-Mikrohärteprüfung
Die Härteprüfung nach Vickers ist in diesem Teil von ISO 6507 für Eindruckdiagonalenlängen zwischen
0,020 mm und 1,400 mm festgelegt.
ANMERKUNG 1 Für Eindruckdiagonalen kleiner als 0,020 mm muss beachtet werden, dass die Messunsicherheit größer wird.
ANMERKUNG 2 Im Allgemeinen nimmt die Streuung der Ergebnisse mit abnehmender Länge bei diagonaler bzw. abnehmender Prüfkraft zu. Dies gilt besonders für die Härteprüfung im Kleinkraft- und im Mikrobereich, wo die genaue Messung der Eindruckdiagonalen eingeschränkter ist. Bei Mikrohärteprüfungen ist die Genauigkeit der Messung der mittleren Eindruckdiagonalenlänge häufig nicht besser als ± 0,001 mm siehe Literaturhinweise [2] bis [5].
Für besondere Werkstoffe und/oder Erzeugnisse gibt es spezielle Internationale Normen.
Matériaux métalliques - Essai de dureté Vickers - Partie 1: Méthode d'essai (ISO 6507-1:2005)
L'ISO 6507-1:2005 spécifie la méthode d'essai de dureté Vickers pour les trois domaines différents de force d'essai, pour les matériaux métalliques.
L'essai de dureté Vickers est spécifié dans l'ISO 6507-1:2005 pour des longueurs de diagonales d'empreinte comprises entre 0,020 mm et 1,400 mm.
Kovinski materiali – Preskus trdote po Vickersu – 1. del: Preskusni postopek (ISO 6507-1:2005)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 6507-1:2006
01-marec-2006
1DGRPHãþD
SIST EN ISO 6507-1:1998
Kovinski materiali – Preskus trdote po Vickersu – 1. del: Preskusni postopek (ISO
6507-1:2005)
Metallic materials - Vickers hardness test - Part 1: Test method (ISO 6507-1:2005)
Metallische Werkstoffe - Härteprüfung nach Vickers - Teil 1: Prüfverfahren (ISO 6507-
1:2005)
Matériaux métalliques - Essai de dureté Vickers - Partie 1: Méthode d'essai (ISO 6507-
1:2005)
Ta slovenski standard je istoveten z: EN ISO 6507-1:2005
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
SIST EN ISO 6507-1:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN ISO 6507-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2005
ICS 77.040.10 Supersedes EN ISO 6507-1:1997
English Version
Metallic materials - Vickers hardness test - Part 1: Test method
(ISO 6507-1:2005)
Matériaux métalliques - Essai de dureté Vickers - Partie 1: Metallische Werkstoffe - Härteprüfung nach Vickers - Teil
Méthode d'essai (ISO 6507-1:2005) 1: Prüfverfahren (ISO 6507-1:2005)
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,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
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EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6507-1:2005: E
worldwide for CEN national Members.
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EN ISO 6507-1:2005 (E)
Foreword
This document (EN ISO 6507-1:2005) 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 6507-1:1997.
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 6507-1:2005 has been approved by CEN as EN ISO 6507-1:2005 without any
modifications.
2
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INTERNATIONAL ISO
STANDARD 6507-1
Third edition
2005-12-15
Metallic materials — Vickers hardness
test —
Part 1:
Test method
Matériaux métalliques — Essai de dureté Vickers —
Partie 1: Méthode d'essai
Reference number
ISO 6507-1:2005(E)
©
ISO 2005
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ISO 6507-1:2005(E)
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ii © ISO 2005 – All rights reserved
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ISO 6507-1:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Principle. 2
4 Symbols and abbreviated terms . 2
5 Testing machine. 3
6 Test piece . 3
7 Procedure . 3
8 Uncertainty of the results . 5
9 Test report . 5
Annex A (normative) Minimum thickness of the test piece in relation to the test force and to the
hardness . 6
Annex B (normative) Tables of correction factors for use in tests made on curved surfaces . 8
Annex C (informative) Procedure for periodic checking of the testing machine by the user . 12
Annex D (informative) Uncertainty of the measured hardness values . 13
Bibliography . 19
© ISO 2005 – All rights reserved iii
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ISO 6507-1:2005(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 6507-1 was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee
SC 3, Hardness testing.
This third edition, together with ISO 6507-4, cancels and replaces the second edition (ISO 6507-1:1997) 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
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ISO 6507-1:2005(E)
Introduction
The periodic checking of the testing machine described in informative Annex C is good metrological practice.
It is intended to make the annex normative in the next revision of this part of ISO 6507 Standard.
For automated measuring systems this standard should be applied accordingly.
© ISO 2005 – All rights reserved v
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INTERNATIONAL STANDARD ISO 6507-1:2005(E)
Metallic materials — Vickers hardness test —
Part 1:
Test method
1 Scope
This part of ISO 6507 specifies the Vickers hardness test method, for the three different ranges of test force
for metallic materials (see Table 1).
Table 1 — Ranges of test force
Ranges of test force, F
Hardness symbol Designation
N
F W 49,03 W HV 5
Vickers hardness test
1,961 u F < 49,03
HV 0,2 to < HV 5 Low-force Vickers hardness test
0,098 07 u F < 1,961
HV 0,01 to < HV 0,2 Vickers microhardness test
The Vickers hardness test is specified in this part of ISO 6507 for lengths of indentation diagonals between
0,020 mm and 1,400 mm.
NOTE 1 For indentation diagonals less than 0,020 mm, the increase of the uncertainty has to be considered.
NOTE 2 In general, decreasing the test force increases the scatter of results of the measurements. This is particularly
true for low-force Vickers hardness tests and Vickers microhardness tests, where the principal limitation will arise in the
measurement of the diagonals of the indentation. For Vickers microhardness, the accuracy of determination of the mean
diagonal length is unlikely to be better than ± 0,001 mm (see Bibliography [2]-[5]).
For specific materials and/or products, particular International Standards exist.
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 6507-2:2005, Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing
machines
ISO 6507-4, Metallic materials — Vickers hardness test — Part 4: Tables of hardness values
© ISO 2005 – All rights reserved 1
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ISO 6507-1:2005(E)
3 Principle
A diamond indenter, in the form of a right pyramid with a square base and with a specified angle between
opposite faces at the vertex, is forced into the surface of a test piece followed by measurement of the diagonal
length of the indentation left in the surface after removal of the test force, F (see Figure 1).
Figure 1 — Principle of the test
The Vickers hardness is proportional to the quotient obtained by dividing the test force by the sloping area of
the indentation, which is assumed to be a right pyramid with a square base, and having at the vertex the same
angle as the indenter.
4 Symbols and abbreviated terms
4.1 See Table 2 and Figure 1.
Table 2 — Symbols and abbreviated terms
Symbol/
Abbreviated Designation
term
α Angle between the opposite faces at the vertex of the pyramidal indenter (136°)
F
Test force, in newtons (N)
d Arithmetic mean, in millimetres, of the two diagonal lengths d and d (see Figure 1)
1 2
136°
2sF in
Test force F
2
HV
Vickers hardness=×Constant = 0,102 ≈ 0,189 1
22
Surface area of indentation
dd
NOTE Constant = 0,102 ≈ 1/9,806 65, where 9,806 65 is the conversion factor from kgf to N.
2 © ISO 2005 – All rights reserved
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ISO 6507-1:2005(E)
4.2 The following is an example of the designation of Vickers hardness HV.
EXAMPLE
5 Testing machine
5.1 Testing machine, capable of applying a predetermined force or forces within the required range of test
forces, in accordance with ISO 6507-2.
5.2 Indenter, a diamond in the shape of a right pyramid with a square base, as specified in ISO 6507-2.
5.3 Measuring system, as specified in ISO 6507-2.
NOTE A suggested procedure for periodic checks of the hardness testing machine by the users is given in Annex C.
6 Test piece
6.1 The test shall be carried out on a surface which is smooth and even, free from oxide scale, foreign
matter and, in particular, completely free from lubricants, unless otherwise specified in product standards. The
finish of the surface shall permit accurate determination of the diagonal length of the indentation.
6.2 Preparation shall be carried out in such a way that any alteration of the surface hardness, due to
excessive heating or cold-working, for example, is minimized.
Due to the small depth of Vickers microhardness indentations, it is essential that special precautions are taken
during preparation. It is recommended to use a polishing/electropolishing process which is suitable for the
material parameters.
6.3 The thickness of the test piece, or of the layer under test, shall be at least 1,5 times the diagonal length
of the indentation (see Annex A).
No deformation shall be visible at the back of the test piece after the test.
6.4 For tests on curved surfaces, the corrections given in Annex B, Tables B.1 to B.6 shall be applied.
6.5 For test pieces of small cross-section or of irregular shape, it may be necessary to provide some form of
additional support.
7 Procedure
7.1 In general, the test is carried out at ambient temperature within the limits of 10 °C to 35 °C. Tests
carried out under controlled conditions shall be made at a temperature of (23 ± 5) °C.
7.2 The test forces given in Table 3 are recommended.
NOTE Other values e.g. HV 2,5 (24,52 N) may be used.
© ISO 2005 – All rights reserved 3
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ISO 6507-1:2005(E)
Table 3 — Test forces
a
Hardness test Low-force hardness test Microhardness test
Nominal value of Nominal value of Nominal value of
Hardness Hardness Hardness
the test force F the test force F the test force F
symbol symbol symbol
N N N
HV 5 49,03 HV 0,2 1,961 HV 0,01 0,098 07
HV 10 98,07 HV 0,3 2,942 HV 0,015 0,147
HV 20 196,1 HV 0,5 4,903 HV 0,02 0,196 1
HV 30 294,2 HV 1 9,807 HV 0,025 0,245 2
HV 50 490,3 HV 2 19,61 HV 0,05 0,490 3
HV 100 980,7 HV 3 29,42 HV 0,1 0,980 7
a
Nominal test forces greater than 980,7 N may be applied.
7.3 The test piece shall be placed on a rigid support. The support surfaces shall be clean and free from
foreign matter (scale, oil, dirt, etc.). It is important that the test piece lies firmly on the support so that
displacement cannot occur during the test.
7.4 Bring the indenter into contact with the test surface and apply the test force in a direction perpendicular
to the surface, without shock or vibration, until the applied force attains the specified value. The time from the
initial application of the force until the full test force is reached shall not be less than 2 s nor greater than 8 s.
For low-force hardness and microhardness tests, the maximum time shall not exceed 10 s. For low-force
hardness and microhardness tests, the approach speed of the indenter shall not exceed 0,2 mm/s.
For micro-hardness tests, the indenter should contact the test piece at a velocity between 15 µm/s and
70 µm/s.
The duration of the test force shall be 10 s to 15 s, except for tests on materials whose time-dependent
properties would make this an unsuitable range. For these tests, a longer duration is permitted and this
duration shall be specified as part of the hardness designation (see EXAMPLE in 4.2).
7.5 Throughout the test, the testing machine shall be protected from shock or vibration.
7.6 The distance between the centre of any indentation and the edge of the test piece shall be at least
2,5 times the mean diagonal length of the indentation in the case of steel, copper and copper alloys, and at
least three times the mean diagonal length of the indentation in the case of light metals, lead and tin and their
alloys.
The distance between the centres of two adjacent indentations shall be at least three times the mean diagonal
length of the indentation in the case of steel, copper and copper alloys, and at least six times the mean
diagonal length in the case of light metals, lead and tin and their alloys. If two adjacent indentations differ in
size, the spacing shall be based on the mean diagonal length of the larger indentation.
7.7 Measure the lengths of the two diagonals. The arithmetical mean of the two readings shall be taken for
the calculation of the Vickers hardness.
For flat surfaces, the difference between the lengths of two indentation diagonals should not be greater than
5 %. If the difference is greater, this shall be stated in the test report.
Magnifications should be provided so that the diagonal can be enlarged to greater than 25 %, but less than
75 % of the field of view.
7.8 ISO 6507-4 contains calculation tables which shall be used to determine the Vickers hardness for tests
on flat surfaces.
4 © ISO 2005 – All rights reserved
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ISO 6507-1:2005(E)
8 Uncertainty of the results
A complete evaluation of the uncertainty should be done according to the ISO Guide to the expression of
[6]
uncertainty in measurement (GUM) .
Independent of the type of sources, for hardness there are two possibilities for the determination of the
uncertainty.
⎯ One possibility is based on the evaluation of all relevant sources appearing during a direct calibration. As
[7]
a reference, an EA guide
...
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