prEN ISO 21952

SLOVENSKI STANDARD
01-junij-2024
Dodajni in pomožni materiali za varjenje - Žične elektrode, žice, palice in obloge za
obločno varjenje jekel, odpornih proti lezenju, v zaščitnem plinu - Razvrstitev
(ISO/DIS 21952:2024)
Welding consumables - Wire electrodes, wires, rods and deposits for gas shielded arc
welding of creep-resisting steels - Classification (ISO/DIS 21952:2024)
Schweißzusätze - Drahtelektroden, Drähte, Stäbe und Schweißgut zum
Schutzgasschweißen von warmfesten Stählen - Einteilung (ISO/DIS 21952:2024)
Produits consommables pour le soudage - Fils-électrodes, fils, baguettes et dépôts pour
le soudage à l'arc sous gaz de protection des aciers résistant au fluage - Classification
(ISO/DIS 21952:2024)
Ta slovenski standard je istoveten z: prEN ISO 21952
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 21952
ISO/TC 44/SC 3
Welding consumables — Wire
Secretariat: ANSI
electrodes, wires, rods and
Voting begins on:
deposits for gas shielded arc
2024-04-24
welding of creep-resisting steels —
Voting terminates on:
Classification
2024-07-17
Produits consommables pour le soudage — Fils-électrodes, fils,
baguettes et dépôts pour le soudage à l'arc sous gaz de protection
des aciers résistant au fluage — Classification
ICS: 25.160.20
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Reference number
ISO/DIS 21952:2024(en)
DRAFT
ISO/DIS 21952:2024(en)
International
Standard
ISO/DIS 21952
ISO/TC 44/SC 3
Welding consumables — Wire
Secretariat: ANSI
electrodes, wires, rods and
Voting begins on:
deposits for gas shielded arc
welding of creep-resisting steels —
Voting terminates on:
Classification
Produits consommables pour le soudage — Fils-électrodes, fils,
baguettes et dépôts pour le soudage à l'arc sous gaz de protection
des aciers résistant au fluage — Classification
ICS: 25.160.20
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 2024
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
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 21952:2024(en)
ii
ISO/DIS 21952:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
4.1 General .2
4.2 Classification systems .2
5 Symbols and requirements . 2
5.1 Symbol for the product or process .2
5.2 Symbol for the chemical composition of wire electrodes, wires, and rods .3
5.3 Symbol for the mechanical properties of all-weld metal .3
5.3.1 Classification by chemical composition – A.3
5.3.2 Classification by tensile strength and chemical composition – B .3
5.4 Symbol for shielding gas .3
5.4.1 Classification by chemical composition – system A .3
5.4.2 Classification by tensile strength and chemical composition – system B .3
6 Mechanical tests .11
7 Preheating and interpass temperatures .11
8 Welding conditions and pass sequence .11
9 Chemical analysis . .12
10 Rounding procedure .12
11 Retest.12
12 Technical delivery conditions .12
13 Examples of designation .12
13.1 Example 1 – Classification by chemical composition – system A . 12
13.2 Example 2 – Classification by tensile strength and chemical composition – system B . 13
13.3 Example 3 – Classification by chemical composition – system A . 13
13.4 Example 4 – Classification by tensile strength and chemical composition – system B . 13
13.5 Example 5 – Classification by chemical composition – system A .14
13.6 Example 6 – Classification by tensile strength and chemical composition – system B .14
13.7 Example 7 – Classification by chemical composition – system A .14
13.8 Example 8 – Classification by tensile strength and chemical composition – system B . 15
Bibliography .16

iii
ISO/DIS 21952:2024(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
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.
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
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 3, Welding consumables, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 121, Welding and allied processes, in accordance with the Agreement on
technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 21952:2012), which has been technically
revised.
The main changes are as follows:
— to be added after DIS ballot
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
Official interpretations of ISO/TC 44 documents, where they exist, are available from this page:
https://committee.iso.org/sites/tc44/home/interpretation.html.

iv
ISO/DIS 21952:2024(en)
Introduction
This document was prepared in collaboration with the International Institute of Welding. It recognizes that
there are two somewhat different approaches in the global market to classifying a given wire electrode, wire,
rod or deposit, and allows for either or both to be used, to suit a particular market need. Application of either
type of classification designation (or of both where suitable) identifies a product as classified in accordance
[1]
with this document. The classification in accordance with system A was mainly based on EN 12070:1999.
The classification in accordance with system B is mainly based upon standards used around the Pacific Rim.
This document proposes a classification system for wire electrodes, wires and rods in terms of their
chemical composition and, where required, in terms of the yield strength, tensile strength and elongation of
the all-weld metal deposit. The ratio of yield to tensile strength of weld metal is generally higher than that of
parent metal. Users should note
...