SIST EN ISO 636:2018

SLOVENSKI STANDARD
SIST EN ISO 636:2018
01-februar-2018
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SIST EN ISO 636:2016
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Welding consumables - Rods, wires and deposits for tungsten inert gas welding of non-
alloy and fine-grain steels - Classification (ISO 636:2017)
Schweißzusätze - Stäbe, Drähte und Schweißgut zum Wolfram-Inertgasschweißen von
unlegierten Stählen und Feinkornstählen - Einteilung (ISO 636:2017)
Produits consommables pour le soudage - Baguettes et fils pour dépôts par soudage
TIG des aciers non alliés et des aciers à grains fins - Classification (ISO 636:2017)
Ta slovenski standard je istoveten z: EN ISO 636:2017
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
SIST EN ISO 636:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 636:2018

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SIST EN ISO 636:2018


EN ISO 636
EUROPEAN STANDARD

NORME EUROPÉENNE

June 2017
EUROPÄISCHE NORM
ICS 25.160.20 Supersedes EN ISO 636:2015
English Version

Welding consumables - Rods, wires and deposits for
tungsten inert gas welding of non-alloy and fine-grain
steels - Classification (ISO 636:2017)
Produits consommables pour le soudage - Baguettes et Schweißzusätze - Stäbe, Drähte und Schweißgut zum
fils pour dépôts par soudage TIG des aciers non alliés Wolfram-Inertgasschweißen von unlegierten Stählen
et des aciers à grains fins - Classification (ISO und Feinkornstählen - Einteilung (ISO 636:2017)
636:2017)
This European Standard was approved by CEN on 20 April 2017.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 636:2017 E
worldwide for CEN national Members.

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SIST EN ISO 636:2018
EN ISO 636:2017 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 636:2018
EN ISO 636:2017 (E)
European foreword
This document (EN ISO 636:2017) has been prepared by Technical Committee ISO/TC 44 “Welding and
allied processes” in collaboration with Technical Committee CEN/TC 121 “Welding and allied
processes” the secretariat 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 December 2017, and conflicting national standards
shall be withdrawn at the latest by December 2017.
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.
This document supersedes EN ISO 636:2015.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 636:2017 has been approved by CEN as EN ISO 636:2017 without any modification.
3

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SIST EN ISO 636:2018

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SIST EN ISO 636:2018
INTERNATIONAL ISO
STANDARD 636
Fifth edition
2017-06
Welding consumables — Rods, wires
and deposits for tungsten inert gas
welding of non-alloy and fine-grain
steels — Classification
Produits consommables pour le soudage — Baguettes et fils pour
dépôts par soudage TIG des aciers non alliés et des aciers à grains fins
— Classification
Reference number
ISO 636:2017(E)
©
ISO 2017

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SIST EN ISO 636:2018
ISO 636:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

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SIST EN ISO 636:2018
ISO 636:2017(E)

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
5 Symbols and requirements . 2
5.1 Symbol for the product/process . 2
5.2 Symbol for strength and elongation of all-weld metal . 3
5.3 Symbol for impact properties of all-weld metal . 4
5.4 Symbol for the chemical composition of rods or wires . 4
6 Mechanical tests . 9
6.1 Preheating and interpass temperatures . 9
6.2 Welding conditions and pass sequence .10
6.3 PWHT condition .10
7 Chemical analysis .10
8 Rounding procedure .11
9 Retesting .11
10 Technical delivery conditions .11
11 Examples of designation .11
Bibliography .13
© ISO 2017 – All rights reserved iii

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SIST EN ISO 636:2018
ISO 636:2017(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.
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 on 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 the following URL: www . i so .org/ iso/ foreword .html.
The committee responsible for this document is ISO/TC 44, Welding and allied processes, Subcommittee
SC 3, Welding consumables.
This fifth edition cancels and replaces the fourth edition (ISO 636:2015), of which it constitutes a minor
revision with the following changes:
— updates to the latest ISO style (including mandatory Clause 3 and subsequent renumbering of
clauses and subclauses);
— in Table 3B, the limits for Ti in the last column have been correctly assigned against NCCT1, NCCT2
and N1M2T and not against N9, NCC and NCC1 as in the 2015 edition;
— the newly agreed wording for Clause 8, “Rounding procedure”, has been introduced.
Requests for official interpretations of any aspect of this document should be directed to the Secretariat
of ISO/TC 44/SC 3 via your national standards body. A complete listing of these bodies can be found at
www .iso .org.
iv © ISO 2017 – All rights reserved

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SIST EN ISO 636:2018
ISO 636:2017(E)

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 column 3 of
Table 1A or Table 1B.
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.
© ISO 2017 – All rights reserved v

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SIST EN ISO 636:2018

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SIST EN ISO 636:2018
INTERNATIONAL STANDARD ISO 636:2017(E)
Welding consumables — Rods, wires and deposits for
tungsten inert gas welding of non-alloy and fine-grain
steels — Classification
1 Scope
This document specifies requirements for classification of rods and wires in the as-welded condition
and in the post-weld heat-treated condition for tungsten inert gas welding of non-alloy and fine-grain
steels with a minimum yield strength of up to 500 MPa or a minimum tensile strength of up to 570 MPa.
This document is a combined specification providing classification utilizing a system based upon the
yield strength and the average impact energy of 47 J of all-weld metal or utilizing a system based upon
the tensile strength and the average impact energy of 27 J of all-weld metal.
a) Paragraphs and tables which carry the suffix letter “A” are applicable only to rods and wires
classified to the system based upon the yield strength and the average impact energy of 47 J of all-
weld metal in accordance with this document.
b) Paragraphs and tables which carry the suffix letter “B” are applicable only to rods and wires
classified to the system based upon the tensile strength and the average impact energy of 27 J of
all-weld metal in accordance with this document.
c) Paragraphs and tables which have neither the suffix letter “A” nor the suffix letter “B” are applicable
to all rods and wires classified in accordance with this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 544, Welding consumables — Technical delivery conditions for filler materials and fluxes — Type of
product, dimensions, tolerances and markings
ISO 13916, Welding — Guidance on the measurement of preheating temperature, interpass temperature
and preheat maintenance temperature
ISO 14175, Welding consumables — Gases and gas mixtures for fusion welding and allied processes
ISO 14344, Welding consumables — Procurement of filler materials and fluxes
ISO 15792-1:2000, Welding consumables — Test methods — Part 1: Test methods for all-weld metal test
specimens in steel, nickel and nickel alloys. Amended by ISO 15792-1:2000/Amd 1:2011.
ISO 80000-1:2009, Quantities and units — Part 1: General. Corrected by ISO 80000-1:2009/Cor. 1:2011.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
© ISO 2017 – All rights reserved 1

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SIST EN ISO 636:2018
ISO 636:2017(E)

4 Classification
4.1 General
Classification designations are based upon two approaches to indicate the tensile properties and the
impact properties of the all-weld metal obtained with rods or wires. The two designation approaches
include additional designators for some other classification requirements, but not all as will be
clear from the following sections. In most cases, a given commercial product can be classified to the
classification requirements in both systems. Then, either or both classification designations can be
used for the product.
Rods or wires shall be classified according to their chemical composition in accordance with Table 3A
or Table 3B.
4.1A Classification by yield strength and 47 J 4.1B Classification according to alloy type
impact energy
The classification is divided into four parts. The classification is divided into four parts.
1) The first part gives a symbol indicating the 1) The first part gives a symbol indicating the
product/process to be identified. product/process to be identified.
2) The second part gives a symbol indicating 2) The second part gives a symbol indicating
the strength and elongation of the all-weld  the strength and elongation of the all-weld
metal (see Table 1A). metal in either the as-welded or post-weld
heat-treated condition (see Table 1B).
3) The third part gives a symbol indicating the
impact properties of all-weld metal (see 3) The third part gives a symbol indicating
Table 2). the impact properties of all-weld metal in
the same condition as specified for the
4) The fourth part gives a symbol indicating
tensile strength (see Table 2). The letter
the chemical composition of the rods or
“U” after this designator indicates that the
wires used (see Table 3A).
deposit meets an average optional
requireme
...