Welding consumables - Tubular cored electrodes for gas shielded metal arc welding of creep-resisting steels - Classification (ISO 17634:2015)

This International Standard specifies requirements for classification of tubular cored electrodes
used in the post-weld heat-treated condition for gas shielded metal arc welding of creep-resisting and
low alloy elevated temperature steels. One tubular cored electrode can be tested and classified with
different shielding gases.
This International Standard is a combined specification providing for classification utilizing a system
based upon the chemical composition of all-weld metal or utilizing a system based upon the tensile
strength and the chemical composition of all-weld metal.
1) Paragraphs and tables which carry the suffix letter “A” are applicable only to tubular cored
electrodes classified to the system based upon chemical composition with requirements for the
yield strength and the average impact energy of 47 J of all-weld metal in accordance with this
International Standard.
2) Paragraphs and tables which carry the suffix letter “B” are applicable only to tubular cored
electrodes classified to the system based upon the tensile strength and chemical composition of allweld
metal in accordance with this International Standard.
3) Paragraphs and tables which have neither the suffix letter “A” nor the suffix letter “B” are applicable
to all tubular cored electrodes classified in accordance with this International Standard.
It is recognized that the operating characteristics of tubular cored electrodes can be modified by the
use of pulsed current, but for the purposes of this International Standard, pulsed current is not used for
determining the electrode classification.

Schweißzusätze - Fülldrahtelektroden zum Metall-Schutzgasschweißen von warmfesten Stählen - Einteilung (ISO 17634:2015)

Produits consommables pour le soudage - Fils-électrodes fourrés pour le soudage à l'arc avec gaz de protection des aciers résistant au fluage - Classification (ISO 17634:2015)

L'ISO 17634:2015 spécifie les exigences relatives à la classification des fils-électrodes fourrés pour soudage à l'arc avec électrode fusible sous protection gazeuse, pour l'état traité thermiquement après soudage, des aciers résistant au fluage et des aciers faiblement alliés pour usage à température élevée. Un fil-électrode fourré peut, le cas échéant, être essayé et classifié avec différents gaz de protection. Elle propose une spécification mixte permettant une classification utilisant un système basé sur la composition chimique du métal fondu hors dilution ou utilisant un système basé sur la résistance à la traction et la composition chimique du métal fondu hors dilution.

Dodajni materiali za varjenje - Strženske žice iz cevi za obločno varjenje jekel, odpornih proti lezenju, v zaščitnem plinu - Razvrščanje (ISO 17634:2015)

Ta mednarodni standard določa zahteve za razvrščanje strženskih žic iz cevi, ki se uporabljajo v stanju po varjenju s toplotno obdelavo pri obločnem varjenju jekel, odpornih proti lezenju, in nizko legiranih jekel pri povišanih temperaturah v zaščitnem plinu. Eno stržensko žico iz cevi je mogoče preskušati in razvrstiti v različnih zaščitnih plinih.
Ta mednarodni standard je kombinirana specifikacija, ki določa razvrstitev po sistemu na osnovi kemijske sestave čistih varov ali po sistemu na osnovi natezne trdnosti in kemijske sestave čistih varov.
1) Odstavki in preglednice z dodano črko »A« se uporabljajo samo za strženske žice iz cevi, ki so razvrščene po sistemu, ki temelji na kemijski sestavi z zahtevami za mejo prožnosti in povprečno energijo udarca, ki znaša 47 J, za čiste vare, v skladu s tem mednarodnim standardom.
2) Odstavki in preglednice z dodano črko »B« se uporabljajo samo za strženske žice iz cevi, ki so razvrščene po sistemu, ki temelji na natezni trdnosti čistih varov in kemijski sestavi čistih varov v skladu s tem mednarodnim standardom.
3) Odstavki in preglednice brez dodane črke »A« ali »B« se uporabljajo za vse strženske žice iz cevi, ki so razvrščene v skladu s tem mednarodnim standardom.
Ugotovljeno je, da se lahko obratovalne značilnosti strženskih žic iz cevi spremenijo z uporabo
udarnega toka, toda za namene tega mednarodnega standarda se udarni tok ne uporablja za določanje razvrstitve žice.

General Information

Status
Published
Public Enquiry End Date
10-Aug-2014
Publication Date
08-Sep-2015
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
03-Sep-2015
Due Date
08-Nov-2015
Completion Date
09-Sep-2015

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SLOVENSKI STANDARD
SIST EN ISO 17634:2015
01-oktober-2015
1DGRPHãþD
SIST EN ISO 17634:2006
'RGDMQLPDWHULDOL]DYDUMHQMH6WUåHQVNHåLFHL]FHYL]DREORþQRYDUMHQMHMHNHO
RGSRUQLKSURWLOH]HQMXY]DãþLWQHPSOLQX5D]YUãþDQMH ,62
Welding consumables - Tubular cored electrodes for gas shielded metal arc welding of
creep-resisting steels - Classification (ISO 17634:2015)
Schweißzusätze - Fülldrahtelektroden zum Metall-Schutzgasschweißen von warmfesten
Stählen - Einteilung (ISO 17634:2015)
Produits consommables pour le soudage - Fils-électrodes fourrés pour le soudage à l'arc
avec gaz de protection des aciers résistant au fluage - Classification (ISO 17634:2015)
Ta slovenski standard je istoveten z: EN ISO 17634:2015
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
SIST EN ISO 17634:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 17634:2015

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SIST EN ISO 17634:2015

EUROPEAN STANDARD
EN ISO 17634

NORME EUROPÉENNE

EUROPÄISCHE NORM
August 2015
ICS 25.160.20 Supersedes EN ISO 17634:2006
English Version
Welding consumables - Tubular cored electrodes for gas
shielded metal arc welding of creep-resisting steels -
Classification (ISO 17634:2015)
Produits consommables pour le soudage - Fils-électrodes Schweißzusätze - Fülldrahtelektroden zum Metall-
fourrés pour le soudage à l'arc avec gaz de protection des Schutzgasschweißen von warmfesten Stählen - Einteilung
aciers résistant au fluage - Classification (ISO 17634:2015) (ISO 17634:2015)
This European Standard was approved by CEN on 11 August 2015.

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, 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
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17634:2015 E
worldwide for CEN national Members.

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SIST EN ISO 17634:2015
EN ISO 17634:2015 (E)
Contents Page
European foreword .3

2

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SIST EN ISO 17634:2015
EN ISO 17634:2015 (E)
European foreword
This document (EN ISO 17634:2015) 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 February 2016, and conflicting national standards shall be withdrawn
at the latest by February 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 17634:2006.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 17634:2015 has been approved by CEN as EN ISO 17634:2015 without any modification.
3

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SIST EN ISO 17634:2015

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SIST EN ISO 17634:2015
INTERNATIONAL ISO
STANDARD 17634
Second edition
2015-08-01
Welding consumables — Tubular
cored electrodes for gas shielded
metal arc welding of creep-resisting
steels — Classification
Produits consommables pour le soudage — Fils-électrodes fourrés
pour le soudage à l’arc avec gaz de protection des aciers résistant au
fluage — Classification
Reference number
ISO 17634:2015(E)
©
ISO 2015

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SIST EN ISO 17634:2015
ISO 17634:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, 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 2015 – All rights reserved

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SIST EN ISO 17634:2015
ISO 17634:2015(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Classification . 2
4 Symbols and requirements . 3
4.1 Symbol for the product/process . 3
4.2 Symbol for the chemical composition of all-weld metal . 3
4.3 Symbol for the mechanical properties of all-weld metal . 3
4.4 Symbol for type of electrode core or the usability characteristics of the electrodes .10
4.5 Symbol for shielding gas .10
4.6 Symbol for welding position .11
4.7 Symbol for hydrogen content of deposited metal .11
5 Mechanical tests .11
5.1 Tensile and impact tests .11
5.2 Preheating and interpass temperatures .12
5.3 Pass sequence .12
6 Chemical analysis .12
7 Rounding procedure .12
8 Fillet weld test .13
9 Retests .14
10 Technical delivery conditions .14
11 Example of designation .14
Annex A (informative) Classification systems .17
Annex B (informative) Description of composition designations of electrode in the
classification system based upon tensile strength and chemical composition .19
Annex C (informative) Description of types of electrode core in the classification system
based upon chemical composition .20
Annex D (informative) Description of types of usability characteristics in the classification
system based upon tensile strength and chemical composition .21
Annex E (informative) Notes on hydrogen content .22
Bibliography .23
© ISO 2015 – All rights reserved iii

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SIST EN ISO 17634:2015
ISO 17634:2015(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 WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 44, Welding and allied processes, Subcommittee
SC 3, Welding consumables.
Requests for official interpretations of any aspect of this International Standard 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.
This second edition cancels and replaces the first edition (ISO 17634:2004), which has been
technically revised.
iv © ISO 2015 – All rights reserved

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SIST EN ISO 17634:2015
ISO 17634:2015(E)

Introduction
This International Standard provides a classification system for tubular cored electrodes in terms of
chemical composition of the all-weld metal, type of electrode core, type of shielding gas, and welding
position or in terms of the tensile properties, chemical composition of the all-weld metal, usability
characteristics of the electrodes, shielding gas, and welding position. The ratio of proof to tensile
strength of weld metal is generally higher than that of parent metal. Matching weld metal proof strength
to parent metal proof strength will not necessarily ensure that the weld metal tensile strength matches
that of the parent metal. Where the application requires matching tensile strength, therefore, selection
of consumables is made by reference to column 4 of Table 2.
Of note is that the mechanical properties of all-weld metal test specimens used to classify the tubular
cored electrodes will vary from those obtained in production joints because of differences in welding
procedure such as electrode size, width of weave, welding position, and parent metal composition.
The classification according to system A is mainly based on EN 12071:1999. The classification according
to system B is mainly based upon standards used around the Pacific Rim.
© ISO 2015 – All rights reserved v

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SIST EN ISO 17634:2015

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SIST EN ISO 17634:2015
INTERNATIONAL STANDARD ISO 17634:2015(E)
Welding consumables — Tubular cored electrodes for gas
shielded metal arc welding of creep-resisting steels —
Classification
1 Scope
This International Standard specifies requirements for classification of tubular cored electrodes
used in the post-weld heat-treated condition for gas shielded metal arc welding of creep-resisting and
low alloy elevated temperature steels. One tubular cored electrode can be tested and classified with
different shielding gases.
This International Standard is a combined specification providing for classification utilizing a system
based upon the chemical composition of all-weld metal or utilizing a system based upon the tensile
strength and the chemical composition of all-weld metal.
1) Paragraphs and tables which carry the suffix letter “A” are applicable only to tubular cored
electrodes classified to the system based upon chemical composition with requirements for the
yield strength and the average impact energy of 47 J of all-weld metal in accordance with this
International Standard.
2) Paragraphs and tables which carry the suffix letter “B” are applicable only to tubular cored
electrodes classified to the system based upon the tensile strength and chemical composition of all-
weld metal in accordance with this International Standard.
3) Paragraphs and tables which have neither the suffix letter “A” nor the suffix letter “B” are applicable
to all tubular cored electrodes classified in accordance with this International Standard.
It is recognized that the operating characteristics of tubular cored electrodes can be modified by the
use of pulsed current, but for the purposes of this International Standard, pulsed current is not used for
determining the electrode classification.
2 Normative references
The following referenced documents, in whole or in part, are normatively referenced in this document
and are indispensable for its application. 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 3690, Welding and allied processes — Determination of hydrogen content in arc weld metal
ISO 6947, Welding and allied processes — Welding positions
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/Amd 1:2011, Welding Consumables — Test methods — Part 1: Test methods for all-weld
metal test specimens in steel, nickel and nickel alloys
ISO 15792-3, Welding consumables — Test methods — Part 3: Classification testing of positional capacity
and root penetration of welding consumables in a fillet weld
ISO 80000-1:2009, Quantities and units — Part 1: General
© ISO 2015 – All rights reserved 1

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SIST EN ISO 17634:2015
ISO 17634:2015(E)

3 Classification
Classification designations are based upon two approaches to indicate the chemical composition, the
tensile properties, and the impact properties of the all-weld metal obtained with a given electrode. 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 in both systems. Then, either or both classification designations can be used for the product.
The classification includes all-weld metal properties obtained with a tubular cored electrode and
appropriate shielding gas combination as given below. With the exception of the symbol for welding
position which is based on ISO 15792-3, the classification is based on the tubular cored electrode size
1,2 mm or if this is not manufactured, the next larger diameter manufactured.
3.1A  Classification by chemical composition 3.1B  Classification by tensile strength and
chemical composition
The classification is divided into six parts: The classification is divided into seven parts:
1)  The first part (T) indicates a tubular cored  1)  The first part (T) indicates a tubular cored
    electrode.    electrode.
2)  The second part gives a symbol indicating  2)  The second part gives a symbol indicating
    the chemical composition of all-weld metal     the strength and elongation of all-weld
    (see Table 1).    metal in the post-weld heat-treated
    condition (see Table 2).
3)  The third part gives a symbol indicating the  3)  The third part gives a symbol indicating the
    type of electrode core (see Table 3A).    usability characteristics of the electrode.
    (see Table 3B);
4)  The fourth part gives a symbol indicating  4)  The fourth part gives a symbol indicating
    the shielding gas (see 4.5).    the welding position (see Table 4B).
5)  The fifth part gives a symbol indicating the  5)  The fifth part gives a symbol indicating the
    welding position (see Table 4A).    shielding gas (see 4.5).
6)  The sixth part gives a symbol indicating the  6)  The sixth part gives a symbol indicating the
    hydrogen content of deposited metal (see chemical composition of all-weld metal
    Table 5). (see Table 1);
 7)  The seventh part gives a symbol indicating
    the hydrogen content of deposited metal
    (see Table 5).
In both systems, the electrode classification shall include all compulsory sections and may include an
optional section as outlined below.
2 © ISO 2015 – All rights reserved

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SIST EN ISO 17634:2015
ISO 17634:2015(E)

3.2A  Compulsory and optional section in  3.2B  Compulsory and optional section in
the classification by chemical composition the classification by tensile strength and
chemical composition
a)  Compulsory section a)  Compulsory section
This section includes the symbols for the type This section includes the symbols for the type
of product, the chemical composition, the type of product, the strength, and elongation in the
of electrode core, and the shielding gas, i.e. the post-weld heat-treated condition, the welding
symbols defined in 4.1, 4.2, 4.4A, and 4.5. positions for which the electrode is suitable, the
usability characteristics, the shielding gas, the
impact properties, and the chemical
composition, i.e. the symbols defined in 4.1, 4.2,
4.3B, 4.4B, 4.5, and 4.6.
b)  Optional section b)  Optional section
This section includes the symbols for the This section includes the symbol for hydrogen
welding positions for which the electrode is content, i.e. the symbol defined in 4.7.
suitable and the symbol for hydrogen content,
i.e. the symbols defined in 4.6 and 4.7.
The full designation shall comprise the compulsory symbols and may include optional symbols
chosen by the manufacturer. The full designation (see Clause 10) shall be used on packages and in the
manufacturer’s literature and data sheets.
4 Symbols and requirements
4.1 Symbol for the product/process
The symbol for the tubular cored electrode used in the gas shielded metal arc welding process is
the letter T.
4.2 Symbol for the chemical composition of all-weld metal
The symbol in Table 1 indicates the chemical composition of all-weld metal determined in accordance
with Clause 6.
4.3 Symbol for the mechanical properties of all-weld metal
4.3A  Classification by chemical composition 4.3B  Classification by tensile strength and
chemical composition
No symbol shall be used for the mechanical  The symbol for tensile strength shall be the
properties of the all-weld metal. The all-weld following:
metal obtained with the tubular cored
—  49 for 490 MPa to 660 MPa tensile strength;
electrodes in Table 1 under conditions given in
—  55 for 550 MPa to 690 MPa tensile strength;
Clause 5 shall also fulfil the mechanical property
requirements specified in Table 2.
—  62 for 620 MPa to 760 MPa tensile strength;
—  69 for 690 MPa to 830 MPa tensile strength.
The complete mechanical property
requirements that shall be fulfilled by the
various compositions are specified in Table 2.

© ISO 2015 – All rights reserved 3

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SIST EN ISO 17634:2015
ISO 17634:2015(E)

4 © ISO 2015 – All rights reserved
Table 1 — Symbol for chemical composition of all-weld metal
a
Chemical composition
b
symbol for classification Chemical composition (percentage mass fraction)
according to
Tensile
Chemical Strength and
composition chemical C Mn Si P S Ni Cr Mo V
c
ISO 17634-A composition
d
ISO 17634-B
Mo (2M3) 0,07 to 0,12 0,60 to 1,30 0,80 0,020 0,020 0,3 0,2 0,40 to 0,65 0,03
(Mo) 2M3 0,12 1,25 0,80 0,030 0,030 — — 0,40 to 0,65 —
MoL 0,07 0,60 to 1,70 0,80 0,020 0,020 0,3 0,2 0,40 to 0,65 0,03
MoV 0,07 to 0,12 0,40 to 1,00 0,80 0,020 0,020 0,3 0,30 to 0,60 0,50 to 0,80 0,25 to 0,45
CM 0,05 to 0,12 1,25 0,80 0,030 0,030 — 0,40 to 0,65 0,40 to 0,65 —
CML 0,05 1,25 0,80 0,030 0,030 — 0,40 to 0,65 0,40 to 0,65 —
CrMo 1 (1CM) 0,05 to 0,12 0,40 to 1,30 0,80 0,020 0,020 0,3 0,90 to 1,40 0,40 to 0,65 0,03
(CrMo 1) 1CM 0,05 to 0,12 1,25 0,80 0,030 0,030 — 1,00 to 1,50 0,40 to 0,65 —
CrMo 1L (1CML) 0,05 0,40 to 1,30 0,80 0,020 0,020 0,3 0,90 to 1,40 0,40 to 0,65 0,03
(CrMo 1L) 1CML 0,05 1,25 0,80 0,030 0,030 — 1,00 to 1,50 0,40 to 0,65 —
1CMH 0,10 to 0,15 1,25 0,80 0,030 0,030 — 1,00 to 1,50 0,40 to 0,65 —
CrMo 2 (2C1M) 0,05 to 0,12 0,40 to 1,30 0,80 0,020 0,020 0,3 2,00 to 2,50 0,90 to 1,30 0,03
(CrMo 2) 2C1M 0,05 to 0,12 1,25 0,80 0,030 0,030 — 2,00 to 2,50 0,90 to 1,20 —
a
  A designation in parentheses [e.g. (CrMo1) or (1CM)] indicates a near match in the other designation system, but not an exact match. The correct designation for a given
composition range is the one without parentheses. A given product can, by having a more restricted chemical composition which fulfils both sets of designation requirements, be
assigned both designations independently provided that the mechanical property requirements of Table 2 are also satisfied.
b
  Single values shown in the table are maximum values.
c
  Cu ≤ 0,3; Nb ≤ 0,1.
d
  The weld metal shall be analysed for the specific elements for which values are shown in this table. Other elements listed without specified values shall be reported if
intentionally added. The total of those latter unspecified elements and all other elements not intentionally added shall not exceed 0,50 %.
e
  Cu 0,50.
f
  Nb: 0,02 to 0,10; N: 0,02 to 0,07; Cu ≤ 0,25; Al ≤ 0,04, Mn + Ni = 1,40 max.
g
  Nb: 0,01 to 0,08; N: 0,02 to 0,07; Cu ≤ 0,25; Al ≤ 0,04.
h
  Consumables for which the chemical composition is not listed in this table shall be symbolized similarly and prefixed by the letter Z or G. The chemical composition ranges
are not specified and therefore it is possible that two electrodes with the same Z classification are not interchangeable.

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SIST EN ISO 17634:2015
ISO 17634:2015(E)

© ISO 2015 – All rights reserved 5
Table 1 (continued)
a
Chemical composition
b
symbol for classification Chemical composition (percentage mass fraction)
according to
Tensile
Chemical Strength and
composition chemical C Mn Si P S Ni Cr Mo V
c
ISO 17634-A composition
d
ISO 17634-B
CrMo 2L (2C1ML) 0,05 0,40 to 1,30 0,80 0,020 0,020 0,3 2,00 to 2,50 0,90 to 1,30 0,03
(CrMo 2L) 2C1ML 0,05 1,25 0,80 0,030 0,030 — 2,00 to 2,50 0,90 to 1,20 —
2C1MH 0,10 to 0,15 1,25 0,80 0,030 0,030 — 2,00 to 2,50 0,90 to 1,20 —
CrMo 5 (5CM) 0,03 to 0,12 0,40 to 1,30 0,80 0,020 0,025 0,3 4,0 to 6,0 0,40 to 0,70 0,03
(CrMo 5) 5CM 0,05 to 0,12 1,25 1,00 0,025 0,030 0,40 4,0 to 6,0 0,45 to 0,65 —
5CML 0,05 1,25 1,00 0,025 0,030 0,40 4,0 to 6,0 0,45 to 0,65 —
e
9C1M 0,05 to 0,12 1,25 1,00 0,040 0,030 0,40 8,0 to 10,5 0,85 to 1,20 —
e
9C1ML 0,05 1,25 1,00 0,040 0,030 0,40 8,0 to 10,5 0,85 to 1,20 —
f
9C1MV 0,08 to 0,13 1,20 0,50 0,020 0,015 0,80 8,0 to 10,5 0,85 to 1,20 0,15 to 0,30
g
9C1MV1 0,05 to 0,12 1,25 to 2,00 0,50 0,020 0,015 1,00 8,0 to 10,5 0,85 to 1,20 0,15 to 0,30
h
Z G Any other agreed composition
a
  A designation in parentheses [e.g. (CrMo1) or (1CM)] indicates a near match in the other designation system, but not an exact match. The correct designation for a given
composition range is the one without parentheses. A given product can, by having a more restricted chemical composition which fulfils both sets of designation requirements, be
assigned both designations independently provided that the mechanical property requirements of Table 2 are also satisfied.
b
  Single values shown in the table are maximum values.
c
  Cu ≤ 0,3; Nb ≤ 0,1.
d
  The weld metal shall be analysed for the specific elements for which values are shown in this table. Other elements listed without specified values shall be reported if
intentionally added. The total of those latter unspecified elements and all other elements not intentionally added shall not exceed 0,50 %.
e
  Cu 0,50.
f
  Nb: 0,02 to 0,10; N: 0,02 to 0,07; Cu ≤ 0,25; Al ≤ 0,04, Mn + Ni = 1,40 max.
g
  Nb: 0,01 to 0,08; N: 0,02 to 0,07; Cu ≤ 0,25; Al ≤ 0,04.
h
  Consumables for which the chemical composition is not listed in this table shall be symbolized similarly and prefixed by the letter Z or G. The chemical composition ranges
are not specified and therefore it is poss
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