SIST EN ISO 17633:2018

Welding consumables - Tubular cored electrodes and rods for gas shielded and non-gas shielded metal arc welding of stainless and heat-resisting steels - Classification (ISO 17633:2017)

This document specifies requirements for classification of tubular flux and metal cored electrodes
and rods, based on the all-weld metal chemical composition, the type of core, shielding gas, welding
position and the all-weld metal mechanical properties, in the as-welded or heat-treated conditions, for
gas shielded and non-gas shielded metal arc welding of stainless and heat-resisting steels.
This document is a combined standard providing for classification utilizing a system based upon
nominal composition or utilizing a system based upon alloy type.
a) Clauses, subclauses, and tables which carry the suffix letter “A” are applicable only to products
classified using the system based upon nominal composition.
b) Clauses, subclauses, and tables which carry the suffix letter “B” are applicable only to products
classified using the system based upon alloy type.
c) Clauses, subclauses, and tables which do not have either the suffix letter “A” or the suffix letter “B”
are applicable to all products classified in accordance with this document.
This document does not use pulsed current for determining the product classification.

Schweißzusätze - Fülldrahtelektroden und Füllstäbe zum Metall-Lichtbogenschweißen mit und ohne Gasschutz von nichtrostenden und hitzebeständigen Stählen - Einteilung (ISO 17633:2017)

Diese Internationale Norm legt Anforderungen für die Einteilung von Fülldrahtelektroden und Füllstäben mit schlackebildender und Metallpulver-Füllung zum Metall-Lichtbogenschweißen mit oder ohne Gasschutz von nichtrostenden und hitzebeständigen Stählen fest. Die Einteilung beruht auf der chemischen Zusammensetzung des reinen Schweißgutes, der Art der Füllung, dem Schutzgas, der Schweißposition und den mechanischen Eigenschaften des reinen Schweißgutes im Schweißzustand oder nach einer Wärmenachbehandlung.
Diese Internationale Norm ist eine kombinierte Norm und benutzt zur Einteilung ein System entsprechend der Nennzusammensetzung oder entsprechend dem Legierungstyp.
a)   Abschnitte, Unterabschnitte und Tabellen mit einem nachgestellten „A“ sind nur für solche Produkte anwendbar, die nach dem System auf Basis der Nennzusammensetzung eingeteilt sind;
b)   Abschnitte, Unterabschnitte und Tabellen mit einem nachgestellten „B“ sind nur für solche Produkte anwendbar, die nach dem System auf Basis des Legierungstyps eingeteilt sind;
c)   Abschnitte, Unterabschnitte und Tabellen, die kein nachgestelltes „A“ oder „B“ enthalten, sind für alle nach dieser Internationalen Norm eingeteilten Fülldrahtelektroden anwendbar.
Es ist bekannt, dass die Schweißeigenschaften von Fülldrahtelektroden durch die Anwendung von pulsierendem Strom beeinflusst werden können, jedoch ist in dieser Internationalen Norm pulsierender Strom nicht für die Einteilung der Fülldrahtelektroden vorgesehen.

Produits consommables pour le soudage - Fils et baguettes fourrés pour le soudage à l'arc avec ou sans protection gazeuse des aciers inoxydables et des aciers résistant aux températures élevées - Classification (ISO 17633:2017)

ISO 17633:2017 spécifie les exigences de classification des fils et baguettes fourrés de flux ou de métal, en fonction de la composition chimique du métal fondu hors dilution, du type fourrage, du gaz de protection, de la position de soudage et des caractéristiques mécaniques du métal fondu hors dilution, fils et baguettes étant destinés au soudage à l'arc avec ou sans protection gazeuse des aciers inoxydables et résistant aux températures élevées.
ISO 17633:2017 est une norme mixte permettant une classification utilisant un système basé sur la classification d'après la composition nominale ou utilisant un système d'après le type d'alliage.
a)    Les articles, paragraphes et tableaux qui portent la lettre «A» ne sont applicables qu'aux produits classifiés selon le système basé sur la composition nominale.
b)    Les articles, paragraphes et tableaux qui portent la lettre «B» ne sont applicables qu'aux produits classifiés selon le système basé sur le type d'alliage.
c)    Les articles, paragraphes et tableaux qui ne portent ni la lettre «A» ni la lettre «B» sont applicables aux fils fourrés pour le soudage à l'arc classifiés conformément au présent document.
ISO 17633:2017 n'utilise pas le courant pulsé pour la détermination de la classification des produits.

Dodajni materiali za varjenje - Strženske žice in palice za obločno varjenje nerjavnih in ognjeodpornih jekel v zaščitnem plinu in brez zaščite - Razvrstitev (ISO 17633:2017)

Ta dokument določa zahteve za razvrstitev strženskih žic in palic na osnovi kemične sestave čistega vara, vrste stržena, zaščitnega plina, položaja varjenja ter mehanskih lastnosti čistega vara v varjenem stanju ali s toplotno obdelavo za obločno varjenje nerjavnih in ognjeodpornih jekel v zaščitnem plinu in brez zaščite.
Ta dokument je združen standard, ki omogoča razvrstitev po sistemu na osnovi nominalne sestave ali sistemu na osnovi vrste zlitine.
a) Točke, podtočke in preglednice z dodano črko »A« se uporabljajo samo za proizvode, razvrščene po sistemu na osnovi nominalne sestave.
b) Točke, podtočke in preglednice z dodano črko »B« se uporabljajo samo za proizvode, razvrščene po sistemu na osnovi vrste zlitine.
c) Točke, podtočke in preglednice brez dodane črke »A« ali »B« se uporabljajo za vse proizvode, razvrščene v skladu s tem dokumentom.
Za določanje razvrstitve proizvodov v tem dokumentu se ne uporablja udarni tok.

General Information

• Status: Published
• Public Enquiry End Date: 05-Apr-2016
• Publication Date: 17-Sep-2018
• ICS: 25.160.20 - Welding consumables
• Technical Committee: VAR - Welding
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 23-Aug-2018
• Due Date: 28-Oct-2018
• Completion Date: 18-Sep-2018
• Ref Project: EN ISO 17633:2018 - Welding consumables - Tubular cored electrodes and rods for gas shielded and non-gas shielded metal arc welding of stainless and heat-resisting steels - Classification (ISO 17633:2017)

Relations

• Replaces: SIST EN ISO 17633:2012 - Welding consumables - Tubular cored electrodes and rods for gas shielded and non-gas shielded metal arc welding of stainless and heat-resisting steels - Classification (ISO 17633:2010)
• Effective Date: 01-Oct-2018
• Amended By: SIST EN ISO 17633:2018/A1:2021 - Welding consumables - Tubular cored electrodes and rods for gas shielded and non-gas shielded metal arc welding of stainless and heat-resisting steels - Classification - Amendment 1 (ISO 17633:2017/Amd 1:2021)
• Effective Date: 01-Oct-2021

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 17633:2018
01-oktober-2018
1DGRPHãþD
SIST EN ISO 17633:2012
'RGDMQLPDWHULDOL]DYDUMHQMH6WUåHQVNHåLFHLQSDOLFH]DREORþQRYDUMHQMH
QHUMDYQLKLQRJQMHRGSRUQLKMHNHOY]DãþLWQHPSOLQXLQEUH]]DãþLWH5D]YUVWLWHY
,62
Welding consumables - Tubular cored electrodes and rods for gas shielded and non-gas
shielded metal arc welding of stainless and heat-resisting steels - Classification (ISO
17633:2017)
Schweißzusätze - Fülldrahtelektroden und Füllstäbe zum Metall-Lichtbogenschweißen
mit und ohne Gasschutz von nichtrostenden und hitzebeständigen Stählen - Einteilung
(ISO 17633:2017)
Produits consommables pour le soudage - Fils et baguettes fourrés pour le soudage à
l'arc avec ou sans protection gazeuse des aciers inoxydables et des aciers résistant aux
températures élevées - Classification (ISO 17633:2017)
Ta slovenski standard je istoveten z: EN ISO 17633:2018
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
SIST EN ISO 17633:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 17633:2018

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SIST EN ISO 17633:2018


EN ISO 17633
EUROPEAN STANDARD

NORME EUROPÉENNE

January 2018
EUROPÄISCHE NORM
ICS 25.160.20 Supersedes EN ISO 17633:2010
English Version

Welding consumables - Tubular cored electrodes and rods
for gas shielded and non-gas shielded metal arc welding of
stainless and heat-resisting steels - Classification (ISO
17633:2017)
Produits consommables pour le soudage - Fils et Schweißzusätze - Fülldrahtelektroden und Füllstäbe
baguettes fourrés pour le soudage à l'arc avec ou sans zum Metall-Lichtbogenschweißen mit und ohne
protection gazeuse des aciers inoxydables et des aciers Gasschutz von nichtrostenden und hitzebeständigen
résistant aux températures élevées - Classification (ISO Stählen - Einteilung (ISO 17633:2017)
17633:2017)
This European Standard was approved by CEN on 17 November 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: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17633:2018 E
worldwide for CEN national Members.

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SIST EN ISO 17633:2018
EN ISO 17633:2018 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 17633:2018
EN ISO 17633:2018 (E)
European foreword
This document (EN ISO 17633:2018) 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 July 2018, and conflicting national standards shall be
withdrawn at the latest by July 2018.
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 17633:2010.
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 17633:2017 has been approved by CEN as EN ISO 17633:2018 without any modification.


3

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SIST EN ISO 17633:2018

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SIST EN ISO 17633:2018
INTERNATIONAL ISO
STANDARD 17633
Third edition
2017-11
Welding consumables — Tubular
cored electrodes and rods for gas
shielded and non-gas shielded metal
arc welding of stainless and heat-
resisting steels — Classification
Produits consommables pour le soudage — Fils et baguettes fourrés
pour le soudage à l'arc avec ou sans protection gazeuse des aciers
inoxydables et des aciers résistant aux températures élevées —
Classification
Reference number
ISO 17633:2017(E)
©
ISO 2017

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SIST EN ISO 17633:2018
ISO 17633:2017(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. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2017 – All rights reserved

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SIST EN ISO 17633:2018
ISO 17633:2017(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
5 Symbols and requirements . 2
5.1 General . 2
5.2 Symbol for the product . 3
5.3 Symbol for the chemical composition of all-weld metal . 3
5.4 Symbol for type of core .19
5.5 Symbol for shielding gas .19
5.6 Symbol for welding position .20
6 Mechanical test .20
6.1 Preheating and interpass temperatures .20
6.2 Pass sequence .21
7 Chemical analysis .21
8 Rounding procedure .21
9 Retests .22
10 Technical delivery conditions .22
11 Examples of designation .22
Annex A (informative) Comparison charts of alloy designation according to nominal
composition and alloy type .24
Annex B (informative) Description of types of core — Classification according to
nominal composition .26
Annex C (informative) Description of types of tubular cored electrodes and rods —
Classification according to alloy type.27
Annex D (informative) Considerations on weld metal ferrite contents .28
Bibliography .31
© ISO 2017 – All rights reserved iii

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SIST EN ISO 17633:2018
ISO 17633:2017(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 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 the following
URL: 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.
This third edition cancels and replaces the second edition (ISO 17633:2010), which has been technically
revised and contains the following changes:
— the chemical compositions and mechanical properties for a number of alloy designations have been
updated;
— new alloy designations have been added;
— a limitation on Bi has been added to the footnotes of Tables 1B-1, 1B-2, 1B-3 and 1B-4;
— the requirements for fillet weld testing have been removed following the same change in ISO 18276;
— the wording in clauses on chemical analysis, rounding procedure and retests has been updated;
— clarification has been brought when a product covers both electrodes and rods;
— additional examples for designations have been inserted.
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 17633:2018
ISO 17633:2017(E)

Introduction
This document provides a classification system for tubular cored electrodes and rods for welding
stainless and heat resisting steels. It recognizes that there are two somewhat different approaches in the
global market to classifying a given tubular stainless steel welding consumable, 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 with this document. The
classification in accordance with system A was mainly based on EN 12073:1999. The classification in
accordance with 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 17633:2018

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SIST EN ISO 17633:2018
INTERNATIONAL STANDARD ISO 17633:2017(E)
Welding consumables — Tubular cored electrodes
and rods for gas shielded and non-gas shielded metal
arc welding of stainless and heat-resisting steels —
Classification
1 Scope
This document specifies requirements for classification of tubular flux and metal cored electrodes
and rods, based on the all-weld metal chemical composition, the type of core, shielding gas, welding
position and the all-weld metal mechanical properties, in the as-welded or heat-treated conditions, for
gas shielded and non-gas shielded metal arc welding of stainless and heat-resisting steels.
This document is a combined standard providing for classification utilizing a system based upon
nominal composition or utilizing a system based upon alloy type.
a) Clauses, subclauses, and tables which carry the suffix letter “A” are applicable only to products
classified using the system based upon nominal composition.
b) Clauses, subclauses, and tables which carry the suffix letter “B” are applicable only to products
classified using the system based upon alloy type.
c) Clauses, subclauses, and tables which do not have either the suffix letter “A” or the suffix letter “B”
are applicable to all products classified in accordance with this document.
This document does not use pulsed current for determining the product classification.
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 6847, Welding consumables — Deposition of a weld metal pad for chemical analysis
ISO 6947, Welding and allied processes — Welding positions
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 2017 – All rights reserved 1

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SIST EN ISO 17633:2018
ISO 17633:2017(E)

ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Classification
Classification designations are based upon two approaches to indicate the chemical composition of the
all-weld metal deposit obtained with a given electrode or rod.
The “nominal composition” approach uses designation components indicating directly the nominal levels
of certain alloying elements, given in a particular order, and some symbols for low but significant levels
of other elements, whose levels are not conveniently expressed as integers. The “alloy type” approach
uses tradition-based three- or four-digit designations for alloy families, and an occasional additional
character or characters for compositional modifications of each original alloy within the family.
This clause includes the symbols for the type of product, the chemical composition of all-weld metal,
the type of core, the shielding gas and the welding position, in accordance with the symbols defined in
Clause 5.
In most cases, a given commercial product can be classified in both systems. Then either or both
classification designations can be used for the product.
4A  Classification according to nominal 4B  Classification according to alloy type
composition
The classification is divided into five parts: The classification is divided into five parts:
a)  the first part gives a symbol indicating the a)  the first part gives a symbol indicating the
product to be identified (see 5.2A); tubular cored electrode and rod (see 5.2B);
b)  the second part gives a symbol indicating the b)  the second part gives a symbol indicating the
chemical composition of the all-weld metal chemical composition of the all-weld metal
(see Table 1A); (see Table 1B-1 to Table 1B-4);
c)  the third part gives a symbol indicating the c)  the third part gives a symbol indicating the
type of core (see Table 3A); type of core (see Table 3B);
d)  the fourth part gives a symbol indicating the d)  the fourth part gives a symbol indicating the
shielding gas (see 5.5); shielding gas (see 5.5);
e)  the fifth part gives a symbol indicating the e)  the fifth part gives a symbol indicating the
welding position (see Table 4A). welding position (see Table 4B).
The full identification (see Clause 11) shall be used on packages and in the manufacturer’s literature
and data sheets.
5 Symbols and requirements
5.1 General
A given tubular cored electrode may be classified with more than one shielding gas. In such cases, each
shielding gas results in a separate classification.
2 © ISO 2017 – All rights reserved

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SIST EN ISO 17633:2018
ISO 17633:2017(E)

5.2 Symbol for the product
5.2A  Classification according to nominal 5.2B  Classification according to alloy type
composition
The symbol for tubular cored product used in The symbol for tubular cored product used in
the metal arc welding process shall be the the metal arc welding process shall be the letters
letter “T”. “TS”. The initial letter, “T”, indicates tubular cored
electrode or rod as distinguished from covered
electrodes and from solid electrodes and rods. The
second letter, “S”, indicates that the alloy system is
stainless or heat-resisting steel.
5.3 Symbol for the chemical composition of all-weld metal
5.3A  Classification according to nominal 5.3B  Classification according to alloy type
composition
The symbols in Table 1A identify the chemical The symbols in Table 1B-1 identify the chemical
composition of all-weld metal determined composition of all-weld metal for gas shielded flux
in accordance with Clause 7. cored electrodes determined in accordance with
Clause 7.
The all-weld metal obtained with the tubular
cored product in Table 1A under conditions The symbols in Table 1B-2 identify the chemical
given in Clause 6 shall also fulfil the composition of all-weld metal for non-gas shielded
requirements given in Table 2A. (See Annex A.) flux cored electrodes determined in accordance
with Clause 7.
The symbols in Table 1B-3 identify the chemical
composition of all-weld metal for gas shielded
metal cored electrodes determined in accordance
with Clause 7.
The symbols in Table 1B-4 identify the chemical
composition of all-weld metal for cored products
for gas tungsten arc welding determined in
accordance with Clause 7.
The all-weld metal obtained with the tubular cored
electrodes and rods in Table 1B-1, Table 1B-2,
Table 1B-3 and Table 1B-4 under conditions given
in Clause 6 shall also fulfil the requirements given
in Table 2B. (See Annex A.)
© ISO 2017 – All rights reserved 3

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SIST EN ISO 17633:2018
ISO 17633:2017(E)

4 © ISO 2017 – All rights reserved
Table 1A — Symbols and all-weld metal chemical composition requirements
(classification according to nominal composition)
a,b
Alloy Chemical composition, % (by mass)
designation
according to
c c d
C Mn Si P S Cr Ni Mo Nb + Ta Cu N Others
nominal
composition
Martensitic/ferritic types
13 0,12 1,5 1,0 0,030 0,025 11,0 to 14,0 0,3 0,3 — 0,5 — —
Ti: 10 × C
13 Ti 0,10 0,80 1,0 0,030 0,030 10,5 to 13,0 0,3 0,3 — 0,5 —
to 1,5
13 4 0,06 1,5 1,0 0,030 0,025 11,0 to 14,5 3,0 to 5,0 0,4 to 1,0 — 0,5 — —
17 0,12 1,5 1,0 0,030 0,025 16,0 to 18,0 0,3 0,3 — 0,5 — —
Austenitic types
19 9 L 0,04 2,0 1,2 0,030 0,025 18,0 to 21,0 9,0 to 11,0 0,3 — 0,5 — —
19 9 Nb 0,08 2,0 1,2 0,030 0,025 18,0 to 21,0 9,0 to 11,0 0,3 8 × C to 1,1 0,5 — —
19 12 3 L 0,04 2,0 1,2 0,030 0,025 17,0 to 20,0 10,0 to 13,0 2,5 to 3,0 — 0,5 — —
19 12 3 Nb 0,08 2,0 1,2 0,030 0,025 17,0 to 20,0 10,0 to 13,0 2,5 to 3,0 8 × C to 1,1 0,5 — —
Ferritic-austenitic types (sometimes referred to as austenitic-ferritic types)
22 9 3 N L 0,04 2,5 1,2 0,030 0,025 21,0 to 24,0 7,5 to 10,5 2,5 to 4,0 — 0,5 0,08 to 0,20 —
23 7 N L 0,04 0,4 to 1,5 1,0 0,030 0,020 22,5 to 25,5 6,5 to 10,0 0,8 — 0,5 0,10 to 0,20 —
25 9 4 N L 0,04 2,5 1,2 0,030 0,025 24,0 to 27,0 8,0 to 10,5 2,5 to 4,5 — — 0,20 to 0,30 —
1,0 to
25 9 4 Cu N L 0,04 2,5 1,2 0,030 0,025 24,0 to 27,0 8,0 to 10,5 2,5 to 4,5 — 0,20 to 0,30 —
2,5
Fully austenitic types
e
18 16 5 N L 0,03 1,0 to 4,0 1,0 0,03 0,02 17,0 to 20,0 16,0 to 19,0 3,5 to 5,0 — 0,5 0,10 to 0,20 —
e
19 13 4 N L 0,04 1,0 to 5,0 1,2 0,030 0,025 17,0 to 20,0 12,0 to 15,0 3,0 to 4,5 — 0,5 0,08 to 0,20 —
1,0 to
e
20 25 5 Cu N L 0,03 1,0 to 4,0 1,0 0,03 0,02 19,0 to 22,0 24,0 to 27,0 4,0 to 6,0 — 0,10 to 0,20 —
2,0
Special types — Often used for dissimilar metal joining
18 8 Mn 0,20 4,5 to 7,5 1,2 0,035 0,025 17,0 to 20,0 7,0 to 10,0 0,3 — 0,5 — —
18 9 Mn Mo 0,04 to 0,14 3,0 to 5,0 1,2 0,035 0,025 18,0 to 21,5 9,0 to 11,0 0,5 to 1,5 — — — —
20 10 3 0,08 2,5 1,2 0,035 0,025 19,5 to 22,0 9,0 to 11,0 2,0 to 4,0 — 0,5 — —
23 12 L 0,04 2,5 1,2 0,030 0,025 22,0 to 25,0 11,0 to 14,0 0,3 — 0,5 — —

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SIST EN ISO 17633:2018
ISO 17633:2017(E)

© ISO 2017 – All rights reserved 5
Table 1A (continued)
a,b
Alloy Chemical composition, % (by mass)
designation
according to
c c d
C Mn Si P S Cr Ni Mo Nb + Ta Cu N Others
nominal
composition
10 × C
23 12 Nb 0,08 1,0 to 2,5 1,0 0,03 0,02 22,0 to 25,0 11,0 to 14,0 0,3 0,5 — —
to 1,0
23 12 2 L 0,04 2,5 1,2 0,030 0,025 22,0 to 25,0 11,0 to 14,0 2,0 to 3,0 — 0,5 — —
29 9 0,15 2,5 1,2 0,035 0,025 27,0 to 31,0 8,0 to 12,0 0,3 — 0,5 — —
Heat-resisting types
Cr + Mo:
16 8 2 0,10 1,0 1,0 to 2,5 0,03 0,02 14,5 to 17,5 7,5 to 9,5 1,0 to 2,5 — 0,5 —
18,5
19 9 H 0,04 to 0,08 1,0 1,0 to 2,5 0,03 0,02 18,0 to 21,0 9,0 to 11,0 0,3 — 0,5 — —
21 10 N 0,06 to 0,09 0,3 to 1,0 1,0 to 2,0 0,02 0,01 20,5 to 22,5 9,5 to 11,0 0,5 — 0,5 0,10 to 0,20 Ce: 0,05
22 12 H 0,15 2,5 1,2 0,030 0,025 20,0 to 23,0 10,0 to 13,0 0,3 — 0,5 — —
25 4 0,15 2,0 1,0 to 2,5 0,03 0,02 24,0 to 27,0 4,0 to 6,0 0,3 — 0,5 — —
e
25 20 0,06 to 0,20 1,0 to 5,0 1,2 0,030 0,025 23,0 to 27,0 18,0 to 22,0 0,3 — 0,5 — —
f
Z Any other agreed composition
a
  Single values are maximum values.
b
  “No requirement for analysis” is indicated by a dash.
c
  The sum of P and S shall not exceed 0,050 % (by mass), except for 18 16 5 N L, 18 8 Mn, and 29 9.
d
  Up to 20 % (by mass) of the amount of Nb can be replaced by Ta.
e
  The all-weld metal is in most cases fully austenitic and therefore can be susceptible to microfissuring or hot cracking. The occurrence of fissuring or cracking
is reduced by increasing the weld metal manganese level and in recognition of this the manganese range is extended for a number of grades.
f
  Consumables for which the chemical composition is not listed shall be symbolized similarly and prefixed by the letter Z. The chemical composition ranges are
not specified and it is possible that two products with the same Z classification are not interchangeable.

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SIST EN ISO 17633:2018
ISO 17633:2017(E)

6 © ISO 2017 – All rights reserved
Table 1B — -1 — Symbols and all-weld metal chemical composition requirements of gas shielded flux cored electrodes
(classification according to alloy type)
a,b
Chemical composition, % (by mass)
Alloy
designation
Typical
according
shielding
c
C Mn Si P S Cr Ni Mo Nb + Ta Cu N Others
to alloy
gas
type
(see 5.5)
C1, M12,
307 0,13 3,30 to 4,75 1,0 0,04 0,03 18,0 to 20,5 9,0 to 10,5 0,5 to 1,5 — 0,75 — —
M21, Z
C1, M12,
308 0,08 0,5 to 2,5 1,0 0,04 0,03 18,0 to 21,0 9,0 to 11,0 0,75 — 0,75 — —
M21, Z
C1, M12,
308L 0,04 0,5 to 2,5 1,0 0,04 0,03 18,0 to 21,0 9,0 to 12,0 0,75 — 0,75 — —
M21, Z
C1, M12, 0,04 to
308H 0,5 to 2,5 1,0 0,04 0,03 18,0 to 21,0 9,0 to 11,0 0,75 — 0,75 — —
M21, Z 0,08
C1, M12,
308Mo 0,08 0,5 to 2,5 1,0 0,04 0,03 18,0 to 21,0 9,0 to 11,0 2,0 to 3,0 — 0,75 — —
M21, Z
C1, M12,
308LMo 0,04 0,5 to 2,5 1,0 0,04 0,03 18,0 to 21,0 9,0 to 12,0 2,0 to 3,0 — 0,75 — —
M21, Z
C1, M12, 0,12 to
308N 0,10 1,0 to 4,0 1,0 0,04 0,03 20,0 to 25,0 7,0 to 11,0 0,5 — 0,5
M21, Z 0,30
C1, M12,
309 0,10 0,5 to 2,5 1,0 0,04 0,03 22,0 to 25,0 12,0 to 14,0 0,75 — 0,75 — —
M21, Z
C1, M12,
309L 0,04 0,5 to 2,5 1,0 0,04 0,03 22,0 to 25,0 12,0 to 14,0 0,75 — 0,75 — —
M21, Z
C1, M12,
309H 0,04 to 0,10 0,5 to 2,5 1,0 0,04 0,03 22,0 to 25,0 12,0 to 14,0 0,75 — 0,75 — —
M21, Z
C1, M12,
309Mo 0,12 0,5 to 2,5 1,0 0,04 0,03 21,0 to 25,0 12,0 to 16,0 2,0 to 3,0 — 0,75 — —
M21, Z
C1, M12,
309LMo 0,04 0,5 to 2,5 1,0 0,04 0,03 21,0 to
...