EN ISO 636:2024

SLOVENSKI STANDARD
01-april-2024
Dodajni in pomožni materiali za varjenje - Palice, žice in čisti vari pri varjenju
nelegiranih in drobnozrnatih jekel po postopku TIG - Razvrstitev (ISO/DIS
636:2024)
Welding consumables - Rods, wires and deposits for tungsten inert gas welding of non-
alloy and fine-grain steels - Classification (ISO/DIS 636:2024)
Schweißzusätze - Stäbe, Drähte und Schweißgut zum Wolfram-Inertgasschweißen von
unlegierten Stählen und Feinkornstählen - Einteilung (ISO/DIS 636:2024)
Produits consommables pour le soudage - Baguettes, fils et dépôts pour soudage TIG
des aciers non alliés et des aciers à grains fins - Classification (ISO/DIS 636:2024)
Ta slovenski standard je istoveten z: prEN ISO 636
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 636
ISO/TC 44/SC 3
Welding consumables — Rods,
Secretariat: ANSI
wires and deposits for tungsten
Voting begins on:
inert gas welding of non-alloy and
2024-02-19
fine-grain steels — Classification
Voting terminates on:
2024-05-13
Produits consommables pour le soudage — Baguettes et fils pour
dépôts par soudage TIG des aciers non alliés et des aciers à grains
fins — 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,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
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 636:2024(en)
DRAFT
ISO/DIS 636:2024(en)
International
Standard
ISO/DIS 636
ISO/TC 44/SC 3
Welding consumables — Rods,
Secretariat: ANSI
wires and deposits for tungsten
Voting begins on:
inert gas welding of non-alloy and
fine-grain steels — Classification
Voting terminates on:
Produits consommables pour le soudage — Baguettes et fils pour
dépôts par soudage TIG des aciers non alliés et des aciers à grains
fins — 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
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: +41 22 749 01 11
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 636:2023(en)
ii
ISO/DIS 636:2023(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
4.1.1 Classification systems .2
5 Symbols and requirements . 2
5.1 Symbol for the product/process .2
5.2 Symbol for strength and elongation of all-weld metal .2
5.3 Symbol for impact properties of all-weld metal .3
5.3.1 A - Classification by yield strength and 47 J impact energy .3
5.3.2 B - Classification by tensile strength and 27 J impact energy .3
5.4 Symbol for the chemical composition of rods or wires .4
6 Mechanical tests . 8
6.1 Preheating and interpass temperatures .8
6.2 Welding conditions and pass sequence .8
6.3 PWHT condition .9
7 Chemical analysis . . 9
8 Rounding procedure . 9
9 Retesting . 9
10 Technical delivery conditions . 10
11 Designation examples . 10
11.1 Example 1 – Classification by yield strength and 47 J impact energy – A .10
11.2 Example 2 – Classification by tensile strength and 27 J impact energy – B .10
11.3 Example 3 - Classification by yield strength and 47 J impact energy – A .11
11.4 Example 4 - Classification by tensile strength and 27 J impact energy – B .11
11.5 Example 4 - Classification by tensile strength and 27 J impact energy – B . 12
Bibliography .13

iii
ISO/DIS 636:2023(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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 sixth edition cancels and replaces the fifth edition (ISO 636:2017), 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 636:2023(en)
Introduction
This document provides a classification for the designation of rods and wires in terms of their chemical
composition and, where required, in terms of the yield strength, tensile strength, and elongation of the all-
weld metal. The ratio of yield to tensile strength of weld metal is generally higher than that of parent metal.
Matching weld metal yield strength to parent metal yield strength will not necessarily ensure that the weld
metal tensile strength matches that of the parent material.
Where the application requires matching tensile strengths, selection of consumables is made by reference to
columns 3 and 7 of Table 2.
Of note is that the mechanical properties of all-weld metal test specimens used to classify the rods and wires
vary from those obtained in production joints because of differences in welding procedure such as diameter,
width of weave, welding position, and material composition.
[1]
The classification according to system A is mainly based on EN 1668:1997. The classification according to
system B is mainly based upon standards used around the Pacific Rim.

v
DRAFT International Standard ISO/DIS 636:2023(en)
Welding consumabl
...