EN ISO 22826:2021

SLOVENSKI STANDARD
01-maj-2021
Porušitveno preskušanje zvarnih spojev na kovinskih materialih - Preskušanje
trdote zvarnih spojev, zvarjenih z laserskim žarkom in elektronskim snopom
(preskus trdote po Vickersu in Knoopu) (ISO 22826:2005)
Destructive tests on welds in metallic materials - Hardness testing of narrow joints
welded by laser and electron beam (Vickers and Knoop hardness tests) (ISO
22826:2005)
Zerstörende Prüfung von Schweißungen an metallischen Werkstoffen - Härteprüfung an
durch Laser- und Elektrostrahleschweißung hergestellten Schweißungen (Vickers und
Knoop Härteprüfung) (ISO 22826:2005)
Essais destructifs des soudures sur matériaux métalliques - Essais de dureté sur joints
étroits soudés par faisceau d'électrons et faisceau laser (Essais de dureté Vickers et
Knoop) (ISO 22826:2005)
Ta slovenski standard je istoveten z: EN ISO 22826:2021
ICS:
25.160.40 Varjeni spoji in vari Welded joints and welds
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 22826
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
EUROPÄISCHE NORM
ICS 25.160.40
English Version
Destructive tests on welds in metallic materials - Hardness
testing of narrow joints welded by laser and electron beam
(Vickers and Knoop hardness tests) (ISO 22826:2005)
Essais destructifs des soudures sur matériaux Zerstörende Prüfung von Schweißungen an
métalliques - Essais de dureté sur joints étroits soudés metallischen Werkstoffen - Härteprüfung an durch
par faisceau d'électrons et faisceau laser (Essais de Laser- und Elektrostrahleschweißung hergestellten
dureté Vickers et Knoop) (ISO 22826:2005) Schweißungen (Vickers und Knoop Härteprüfung) (ISO
22826:2005)
This European Standard was approved by CEN on 15 February 2021.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22826:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 22826:2005 has been prepared by Technical Committee ISO/TC 44 "Welding and allied
processes” of the International Organization for Standardization (ISO) and has been taken over as
of which is held by DIN.
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 2021, and conflicting national standards
shall be withdrawn at the latest by September 2021.
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.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 22826:2005 has been approved by CEN as EN ISO 22826:2021 without any modification.

INTERNATIONAL ISO
STANDARD 22826
First edition
2005-09-01
Destructive tests on welds in metallic
materials — Hardness testing of narrow
joints welded by laser and electron beam
(Vickers and Knoop hardness tests)
Essais destructifs des soudures sur matériaux métalliques — Essais de
dureté sur joints étroits soudés par faisceau d'électrons et faisceau
laser (Essais de dureté Vickers et Knoop)

Reference number
ISO 22826:2005(E)
©
ISO 2005
ISO 22826:2005(E)
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ii © ISO 2005 – All rights reserved

ISO 22826:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 General. 2
4 Symbols and abbreviated terms . 2
5 Preparation of test specimens . 3
6 Test procedure . 3
6.1 General. 3
6.2 Type of test. 3
6.3 Test location requirements. 4
6.4 Individual indentation (type E test). 6
6.5 Rows of indentations (type R test). 8
7 Test results. 11
8 Test report . 11
Annex A (informative) Selection of test force . 12
Annex B (informative) Example of a test report format for type E hardness test. 14
Annex C (informative) Example of a test report format for type R hardness test . 15
Bibliography . 16

ISO 22826:2005(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 22826 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 5, Testing and inspection of welds.
iv © ISO 2005 – All rights reserved

ISO 22826:2005(E)
Introduction
Requests for official interpretation of any aspect of this International Standard should be directed to the
Secretariat of ISO/TC 44/SC 5 via your national standards body. A complete listing of these bodies can be
found at www.iso.org
INTERNATIONAL STANDARD ISO 22826:2005(E)

Destructive tests on welds in metallic materials — Hardness
testing of narrow joints welded by laser and electron beam
(Vickers and Knoop hardness tests)
1 Scope
This International Standard specifies the requirements for hardness testing of transverse sections of narrow
laser and electron beam welded joints in metallic materials. It covers Vickers and Knoop hardness tests in
accordance with ISO 6507-1 and ISO 4545, respectively, with test forces of 0,098 N to just under 98 N
(HV 0,01 to just under HV 10) for the Vickers hardness test and test forces up to and including 9,8 N (just
under HK 1) for the Knoop hardness test.
This International Standard is applicable to welds made with or without filler wire. It may not be applicable to
the testing of wider hybrid laser/arc welds.
International Standards for hardness testing of welds without a narrow profile are ISO 9015-1 and ISO 9015-2.
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 4545, Metallic materials — Hardness test — Knoop test
ISO 4546, Metallic materials — Hardness test — Verification of Knoop hardness testing machines
ISO 4547, Metallic materials — Hardness test — Calibration of standardized blocks to be used for Knoop
hardness testing machines
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
1)
ISO 6507-2:— , Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing
machines
2)
ISO 6507-3:— , Metallic materials — Vickers hardness test — Part 3: Calibration of reference blocks
ISO 10250, Metallic materials — Hardness testing — Tables of Knoop hardness values for use in tests made
on flat surfaces
ISO/TR 16060, Destructive tests on welds in metallic materials — Etchants for macroscopic and microscopic
examination
1) To be published. (Revision of ISO 6507-2:1997)
2) To be published. (Revision of ISO 6507-3:1997)
ISO 22826:2005(E)
3 General
Hardness testing shall
...