EN 61788-6:2008

SLOVENSKI STANDARD
01-september-2008
Superprevodnost - 6. del: Meritve mehanskih lastnosti - Natezni preskus pri sobni
temperaturi za superprevodnike iz kompozita Cu/Nb-Ti (IEC 61788-6:2008)
Superconductivity - Part 6: Mechanical properties measurement - Room temperature
tensile test of Cu/Nb-Ti composite superconductors
Supraleitfähigkeit - Teil 6: Messung der mechanischen Eigenschaften - Messung der
Zugfestigkeit von Cu/NbTi-Verbundsupraleitern bei Raumtemperatur
Supraconductivité - Partie 6: Mesure des propriétés mécaniques - Essai de traction à
température ambiante des composites supraconducteurs de Cu/Nb-Ti
Ta slovenski standard je istoveten z: EN 61788-6:2008
ICS:
29.050 Superprevodnost in prevodni Superconductivity and
materiali conducting materials
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 61788-6
NORME EUROPÉENNE
May 2008
EUROPÄISCHE NORM
ICS 29.050; 77.040.10 Supersedes EN 61788-6:2001

English version
Superconductivity -
Part 6: Mechanical properties measurement -
Room temperature tensile test of Cu/Nb-Ti composite superconductors
(IEC 61788-6:2008)
Supraconductivité -  Supraleitfähigkeit -
Partie 6: Mesure des propriétés Teil 6: Messung der mechanischen
mécaniques - Eigenschaften -
Essai de traction à température ambiante Messung der Zugfestigkeit von
des composites supraconducteurs de Cu/NbTi-Verbundsupraleitern
Cu/Nb-Ti bei Raumtemperatur
(CEI 61788-6:2008) (IEC 61788-6:2008)

This European Standard was approved by CENELEC on 2008-04-01. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61788-6:2008 E
Foreword
The text of document 90/207/FDIS, future edition 2 of IEC 61788-6, prepared by IEC TC 90,
Superconductivity, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 61788-6 on 2008-04-01.
This European Standard supersedes EN 61788-6:2001.
– the minimum distance between grips was changed from 100 mm to 60 mm;
– accuracy and precision statement were converted to uncertainty statements.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-01-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-04-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61788-6:2008 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61788-5 NOTE  Harmonized as EN 61788-5:2001 (not modified).
__________
- 3 - EN 61788-6:2008
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1)
IEC 60050-815 - International Electrotechnical Vocabulary - -
(IEV) -
Part 815: Superconductivity
1) 2)
ISO 376 - Metallic materials - Calibration of EN ISO 376 2004
force-proving instruments used for the
verification of uniaxial testing machines

1)
ISO 6892 - Metallic materials - Tensile testing at ambient - -
temperature
1) 2)
ISO 7500-1 - Metallic materials - Verification of static EN ISO 7500-1 2004
uniaxial testing machines -
Part 1: Tension/compression testing
machines - Verification and calibration of the
force-measuring system
1) 2)
ISO 9513 - Metallic materials - Calibration of EN ISO 9513 2002
extensometers used in uniaxial testing

1)
Undated reference.
2)
Valid edition at date of issue.

IEC 61788-6
Edition 2.0 2008-01
INTERNATIONAL
STANDARD
Superconductivity –
Part 6: Mechanical properties measurement – Room temperature tensile test of
Cu/Nb-Ti composite superconductors

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
S
ICS 29.050; 77.040.10 ISBN 2-8318-9529-4

– 2 – 61788-6 © IEC:2008(E)
CONTENTS
FOREWORD.3
INTRODUCTION.5

1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 Principle .7
5 Apparatus.7
5.1 Conformity.7
5.2 Testing machine .7
5.3 Extensometer .8
6 Specimen preparation.8
6.1 Straightening the specimen .8
6.2 Length of specimen .8
6.3 Removing insulation .8
6.4 Determination of cross-sectional area (S ) .8
o
7 Testing conditions .8
7.1 Specimen gripping.8
7.2 Pre-loading and setting of extensometer .8
7.3 Testing speed.8
7.4 Test.9
8 Calculation of results .9
8.1 Tensile strength (R ) .9
m
8.2 0,2 % proof strength (R and R ) .9
p0,2A p0,2B
8.3 Modulus of elasticity (E and E ) .9
o a
9 Uncertainty.10
10 Test report.10
10.1 Specimen .10
10.2 Results.10
10.3 Test conditions.11

Annex A (informative) Additional information relating to Clauses 1 to 10 .13
Annex B (informative) Uncertainty considerations .18

Bibliography.21

Figure 1 – Stress-strain curve and definition of modulus of elasticity and 0,2 % proof
strengths .12
Figure A.1 – An example of the light extensometer, where R1 and R3 indicate the
corner radius .16
Figure A.2 – An example of the extensometer provided with balance weight and
vertical specimen axis.17

61788-6 © IEC:2008(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
SUPERCONDUCTIVITY –
Part 6: Mechanical properties measurement –
Room temperature tensile test of Cu/Nb-Ti
composite superconductors
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61788-6 has been prepared by IEC technical committee 90:
Superconductivity.
This second edition cancels and replaces the fi
...