prEN ISO 7799

SLOVENSKI STANDARD
01-julij-2026
Kovinski materiali - Plošče in trakovi debeline 3 mm ali manj - Preskus upogibanja
v nasprotni smeri (ISO/DIS 7799:2026)
Metallic materials - Sheet and strip 3 mm thick or less - Reverse bend test (ISO/DIS
7799:2026)
Metallische Werkstoffe - Bleche und Bänder mit einer Dicke unter 3 mm - Hin- und
Herbiegeversuch (ISO/DIS 7799:2026)
Matériaux métalliques - Tôles et feuillards d'épaisseur inférieure ou égale à 3 mm - Essai
de pliage alterné (ISO/DIS 7799:2026)
Ta slovenski standard je istoveten z: prEN ISO 7799
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.

DRAFT
International
Standard
ISO/DIS 7799
ISO/TC 164/SC 2
Metallic materials — Sheet and strip
Secretariat: JISC
3 mm thick or less — Reverse bend
Voting begins on:
test
2026-04-28
Matériaux métalliques — Tôles et feuillards d'épaisseur
Voting terminates on:
inférieure ou égale à 3 mm — Essai de pliage alterné
2026-07-21
ICS: 77.040.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
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STANDARDS MAY ON OCCASION HAVE TO
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WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 7799:2026(en)
DRAFT
ISO/DIS 7799:2026(en)
International
Standard
ISO/DIS 7799
ISO/TC 164/SC 2
Metallic materials — Sheet and strip
Secretariat: JISC
3 mm thick or less — Reverse bend
Voting begins on:
test
Matériaux métalliques — Tôles et feuillards d'épaisseur
Voting terminates on:
inférieure ou égale à 3 mm — Essai de pliage alterné
ICS: 77.040.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
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NATIONAL REGULATIONS.
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TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 7799:2026(en)
ii
ISO/DIS 7799:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and designations . 1
5 Principle . 1
6 Testing equipment . 2
6.1 General .2
6.2 Cylindrical supports and gripping faces .3
6.3 Bending arm and guide .3
7 Test piece . 3
8 Procedure . 4
9 Test report . 5
Annex A (informative) Examples of some devices applying force to test pieces . 6
Bibliography . 8

iii
ISO/DIS 7799:2026(en)
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
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The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
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This document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee
SC 2, Ductility testing.
This second edition cancels and replaces the first edition (ISO 7799:1985), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— symbols for applied tension, F, width of test piece, b and width of slit of the guide, w have been added in
Table 1;
— Table 2 has been adjusted to include the limits of the distance, L, from the top tangential plane of
cylindrical supports to the bottom face of the guide, and the width of the slit of the guide, w;
— the test piece length has been modified for ease of application;
— the requirements for t
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