SIST EN ISO 26304:2018
(Main)Welding consumables - Solid wire electrodes, tubular cored electrodes and electrode-flux combinations for submerged arc welding of high strength steels - Classification (ISO 26304:2017)
Welding consumables - Solid wire electrodes, tubular cored electrodes and electrode-flux combinations for submerged arc welding of high strength steels - Classification (ISO 26304:2017)
This document specifies requirements for classification of solid wire electrodes, tubular cored
electrodes, and electrode-flux combinations (the all-weld metal deposits) in the as-welded condition
and in the post-weld heat-treated condition for submerged arc welding of high strength steels with a
minimum yield strength greater than 500 MPa or a minimum tensile strength greater than 570 MPa.
One flux can be tested and classified with different electrodes. One electrode can be tested and
classified with different fluxes. The solid wire electrode is also classified separately based on its
chemical composition.
This document is a combined specification providing for classification utilizing a system based on the
yield strength and average impact energy of 47 J for the all-weld metal, or utilizing a system based on
the tensile strength and average impact energy of 27 J for the all-weld metal.
a) Clauses, subclauses and tables which carry the suffix letter “A” are applicable only to solid wire
electrodes, tubular cored electrodes and the all-weld metal deposits classified to the system based
on the yield strength and the average impact energy of 47 J for the all-weld metal obtained with
electrode-flux combinations in accordance with this document.
b) Clauses, subclauses and tables which carry the suffix letter “B” are applicable only to solid wire
electrodes, tubular cored electrodes and the all-weld metal deposits classified to the system based
on the tensile strength and the average impact energy of 27 J for the all-weld metal obtained with
electrode-flux combinations in accordance with this document.
c) Clauses, subclauses and tables which do not have either the suffix letter “A” or the suffix letter “B”
are applicable to all solid wire electrodes, tubular cored electrodes and electrode-flux combinations
classified in accordance with this document.
For comparison purposes, some tables include requirements for electrodes classified in accordance with
both systems, placing individual electrodes from the two systems, which are similar in composition and
properties, on adjacent lines in the particular table. In a particular line of the table that is mandatory in
one system, the symbol for the similar electrode from the other system is indicated in parentheses. By
appropriate restriction of the formulation of a particular electrode, it is often, but not always, possible
to produce an electrode that can be classified in both systems, in which case the electrode, or its
packaging, can be marked with the classification in either or both systems.
Schweißzusätze - Massivdrahtelektroden, Fülldrahtelektroden und Draht-Pulver-Kombinationen zum Unterpulverschweißen von hochfesten Stählen - Einteilung (ISO 26304:2017)
Produits consommables pour le soudage - Fils-électrodes pleins, fils-électrodes fourrés et couples électrodes-flux pour le soudage à l'arc sous flux des aciers à haute résistance - Classification (ISO 26304:2017)
ISO 26304:2017 spécifie les exigences relatives à la classification des fils-électrodes pleins, des fils-électrodes fourrés et des couples fils-flux (dépôts en métal fondu hors dilution) à l'état brut de soudage ou après traitement thermique après soudage des aciers à haute résistance ayant une limite d'élasticité minimale supérieure à 500 MPa ou une résistance à la traction minimale supérieure à 570 MPa. Un flux peut être soumis à essai et être classifié avec différents fils-électrodes. Un fil-électrode peut être soumis à essai et être classifié avec différents flux. Le fil-électrode plein est également classifié séparément d'après sa composition chimique.
La présente Norme internationale constitue une spécification mixte permettant une classification utilisant un système basé soit sur la limite d'élasticité et l'énergie de rupture moyenne de 47 J pour le métal fondu hors dilution, soit sur la résistance à la traction et l'énergie de rupture moyenne de 27 J pour le métal fondu hors dilution.
a) Les articles, les paragraphes et les tableaux qui portent le suffixe «A» ne sont applicables qu'aux fils-électrodes pleins, aux fils-électrodes fourrés et dépôts en métal fondu hors dilution classifiés d'après le système basé sur la limite d'élasticité et l'énergie de rupture moyenne de 47 J pour le métal fondu hors dilution obtenu avec des couples fils-flux conformément à la présente Norme internationale.
b) Les articles, les paragraphes et les tableaux qui portent le suffixe «B» ne sont applicables qu'aux fils-électrodes pleins, aux fils-électrodes fourrés et dépôts en métal fondu hors dilution classifiés d'après le système basé sur la résistance à la traction et l'énergie de rupture moyenne de 27 J pour le métal fondu hors dilution obtenu avec des couples fils-flux conformément à la présente Norme internationale.
c) Les articles, les paragraphes et les tableaux qui ne portent ni le suffixe «A» ni le suffixe «B» sont applicables à tous les fils-électrodes pleins, fils-électrodes fourrés et couples fil-flux classifiés conformément à la présente Norme internationale.
À des fins de comparaison, certains tableaux comportent des exigences pour des électrodes classifiées selon les deux systèmes, en plaçant des électrodes individuelles issues des deux systèmes, semblables en composition et en propriétés, sur des lignes adjacentes du tableau particulier. Sur une ligne particulière du tableau, obligatoire pour un système, le symbole pour l'électrode semblable dans l'autre système est indiqué entre parenthèses. Selon une restriction appropriée de la formulation d'une électrode particulière, il est souvent mais pas toujours possible de produire une électrode qui peut être classifiée selon les deux systèmes, auquel cas l'électrode, ou son emballage, peut être marquée avec la classification de l'un ou l'autre système.
Dodajni materiali za varjenje - Masivne žice, strženske žice in kombinacije žic in praškov za obločno varjenje visokotrdnostnih jekel pod praškom - Razvrstitev (ISO 26304:2017)
Ta dokument določa zahteve za razvrstitev masivnih žic, strženskih žic ter kombinacij žic in praškov (čisti vari), ki so namenjeni obločnemu varjenju visokotrdnostnih jekel pod praškom, v varjenem stanju in stanju po varjenju s toplotno obdelavo z minimalno mejo prožnosti več kot 500 MPa ali minimalno natezno trdnostjo več kot 570 MPa. En prašek je mogoče preskušati in razvrstiti z različnimi elektrodami. Eno elektrodo je mogoče preskušati in razvrstiti z različnimi praški. Masivna žica je razvrščena ločeno na podlagi kemične sestave.
Ta dokument je združena specifikacija, ki določa razvrstitev po sistemu na osnovi meje prožnosti in povprečne energije udarca 47 J za čiste vare ali po sistemu na osnovi natezne trdnosti in povprečne energije udarca 27 J za čiste vare.
a) Točke, podtočke in preglednice z dodano črko »A« se uporabljajo samo za masivne žice, strženske žice ter čiste vare, ki so razvrščeni po sistemu na osnovi meje prožnosti in povprečni energiji udarca 47 J za čiste vare, pridobljene s kombinacijami žic in praška v skladu s tem dokumentom.
b) Točke, podtočke in preglednice z dodano črko »B« se uporabljajo samo za masivne žice, strženske žice ter čiste vare, ki so razvrščeni po sistemu na osnovi natezne trdnosti in povprečne energije udarca 27 J za čiste vare, pridobljene s kombinacijami žic in praška v skladu s tem dokumentom.
c) Točke, podtočke in preglednice brez dodane črke »A« ali »B« se uporabljajo za vse masivne žice, strženske žice ter kombinacije žic in praškov, ki so razvrščene v skladu s tem dokumentom.
Za namene primerjave nekatere preglednice vključujejo zahteve za elektrode, ki so razvrščene v skladu z obema sistemoma, pri čemer so posamezne elektrode iz dveh sistemov, ki so si podobne po sestavi in lastnostih, navedene v sosednjih vrsticah v posamezni preglednici. V posamezni vrstici preglednice, ki je obvezna za en sistem, je simbol za podobno elektrodo iz drugega sistema naveden v navednicah. Z ustrezno omejitvijo formulacije posamezne elektrode je pogosto, vendar ne vedno, mogoče
izdelati elektrodo, ki jo je mogoče uvrstiti v oba sistema. V tem primeru se elektrodo ali njeno embalažo lahko označi s simboli za razvrstitev v enega ali oba sistema.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 26304:2018
01-oktober-2018
1DGRPHãþD
SIST EN ISO 26304:2011
'RGDMQLPDWHULDOL]DYDUMHQMH0DVLYQHåLFHVWUåHQVNHåLFHLQNRPELQDFLMHåLFLQ
SUDãNRY]DREORþQRYDUMHQMHYLVRNRWUGQRVWQLKMHNHOSRGSUDãNRP5D]YUVWLWHY ,62
Welding consumables - Solid wire electrodes, tubular cored electrodes and electrode-flux
combinations for submerged arc welding of high strength steels - Classification (ISO
26304:2017)
Schweißzusätze - Massivdrahtelektroden, Fülldrahtelektroden und Draht-Pulver-
Kombinationen zum Unterpulverschweißen von hochfesten Stählen - Einteilung (ISO
26304:2017)
Produits consommables pour le soudage - Fils-électrodes pleins, fils-électrodes fourrés
et couples électrodes-flux pour le soudage à l'arc sous flux des aciers à haute résistance
- Classification (ISO 26304:2017)
Ta slovenski standard je istoveten z: EN ISO 26304:2018
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
SIST EN ISO 26304:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 26304:2018
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SIST EN ISO 26304:2018
EN ISO 26304
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2018
EUROPÄISCHE NORM
ICS 25.160.20 Supersedes EN ISO 26304:2011
English Version
Welding consumables - Solid wire electrodes, tubular
cored electrodes and electrode-flux combinations for
submerged arc welding of high strength steels -
Classification (ISO 26304:2017)
Produits consommables pour le soudage - Fils- Schweißzusätze - Massivdrahtelektroden,
électrodes pleins, fils-électrodes fourrés et couples Fülldrahtelektroden und Draht-Pulver-Kombinationen
électrodes-flux pour le soudage à l'arc sous flux des zum Unterpulverschweißen von hochfesten Stählen -
aciers à haute résistance - Classification (ISO Einteilung (ISO 26304:2017)
26304:2017)
This European Standard was approved by CEN on 9 January 2018.
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 26304:2018 E
worldwide for CEN national Members.
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SIST EN ISO 26304:2018
EN ISO 26304:2018 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 26304:2018
EN ISO 26304:2018 (E)
European foreword
This document (EN ISO 26304:2018) 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 August 2018, and conflicting national standards shall
be withdrawn at the latest by August 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 26304:2011.
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 26304:2017 has been approved by CEN as EN ISO 26304:2018 without any modification.
3
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SIST EN ISO 26304:2018
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SIST EN ISO 26304:2018
INTERNATIONAL ISO
STANDARD 26304
Third edition
2017-11
Welding consumables — Solid wire
electrodes, tubular cored electrodes
and electrode-flux combinations
for submerged arc welding of high
strength steels — Classification
Produits consommables pour le soudage — Fils-électrodes pleins, fils-
électrodes fourrés et couples électrodes-flux pour le soudage à l'arc
sous flux des aciers à haute résistance — Classification
Reference number
ISO 26304:2017(E)
©
ISO 2017
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SIST EN ISO 26304:2018
ISO 26304:2017(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 26304:2018
ISO 26304:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification . 2
4.1 General . 2
5 Symbols and requirements . 3
5.1 General . 3
5.2 Symbol for the product or process . 3
5.3 Symbols for the tensile properties of the all-weld metal deposit . 4
5.4 Symbol for the impact properties of the all-weld metal. 5
5.5 Symbol for the type of welding flux . 5
5.6 Symbol for the chemical composition of solid wire electrodes and of the all-weld
metal from tubular cored electrode-flux combinations . 5
5.7 Symbol for the post-weld heat treatment .12
5.8 Optional symbol for hydrogen content of deposited metal .13
6 Mechanical tests .14
6.1 Tensile and impact tests .14
6.2 Preheating and interpass temperature .14
6.3 Welding conditions and pass sequence .14
7 Chemical analysis .16
8 Rounding procedure .16
9 Retests .16
10 Technical delivery conditions .16
11 Examples of designation .16
Annex A (informative) Possible risk of weld metal hydrogen cracking .20
Bibliography .21
© ISO 2017 – All rights reserved iii
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SIST EN ISO 26304:2018
ISO 26304:2017(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 26304:2011), which has been technically
revised. The main changes compared to the previous edition are as follows:
— the chemical compositions of a number of solid wire electrodes and all-weld metal from tubular
cored electrode-flux combinations have been changed;
— H2 and H4 are now options for hydrogen content;
— an example of a Z designation has been added to Clause 11.
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 26304:2018
ISO 26304:2017(E)
Introduction
This document recognizes that there are two somewhat different approaches in the global market to
classifying a given solid wire electrode, tubular cored electrode, and electrode-flux combination, 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 originally based on EN 14295.
The classification in accordance with system B is mainly based on standards used around the Pacific
Rim. Future revisions aim to merge the two approaches into a single classification system.
This document provides a classification for the designation of solid wire electrodes in terms of their
chemical composition, tubular cored electrodes in terms of the deposit composition obtained with a
particular submerged arc flux, and, where required, electrode-flux combinations in terms of the yield
strength, tensile strength, elongation, and impact properties of the all-weld metal deposit. The ratio
of yield to tensile strength of weld metal is generally higher than that of parent material. Users should
note that matching weld metal yield strength to parent metal yield strength does not necessarily ensure
that the weld metal tensile strength matches that of the parent material. Thus, where the application
requires matching tensile strength, selection of the consumable should be made by reference to
column 3 of Table 1A or Table 1B, as appropriate.
Although combinations of electrodes and fluxes supplied by individual companies can have the same
classification, it is possible that the combination of an electrode with a flux from one manufacturer
and the same electrode with the flux from another manufacturer — both fluxes having the same
classification — might not be interchangeable unless verified in accordance with this document. Two
tubular cored wires of the same classification can likewise produce different results with the same flux.
The mechanical properties of the all-weld metal test specimens used to classify the electrode-
flux combinations vary from those obtained in production joints because of differences in welding
procedures such as electrode size, width of weave, welding position, and material composition.
© ISO 2017 – All rights reserved v
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SIST EN ISO 26304:2018
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SIST EN ISO 26304:2018
INTERNATIONAL STANDARD ISO 26304:2017(E)
Welding consumables — Solid wire electrodes, tubular
cored electrodes and electrode-flux combinations
for submerged arc welding of high strength steels —
Classification
1 Scope
This document specifies requirements for classification of solid wire electrodes, tubular cored
electrodes, and electrode-flux combinations (the all-weld metal deposits) in the as-welded condition
and in the post-weld heat-treated condition for submerged arc welding of high strength steels with a
minimum yield strength greater than 500 MPa or a minimum tensile strength greater than 570 MPa.
One flux can be tested and classified with different electrodes. One electrode can be tested and
classified with different fluxes. The solid wire electrode is also classified separately based on its
chemical composition.
This document is a combined specification providing for classification utilizing a system based on the
yield strength and average impact energy of 47 J for the all-weld metal, or utilizing a system based on
the tensile strength and average impact energy of 27 J for the all-weld metal.
a) Clauses, subclauses and tables which carry the suffix letter “A” are applicable only to solid wire
electrodes, tubular cored electrodes and the all-weld metal deposits classified to the system based
on the yield strength and the average impact energy of 47 J for the all-weld metal obtained with
electrode-flux combinations in accordance with this document.
b) Clauses, subclauses and tables which carry the suffix letter “B” are applicable only to solid wire
electrodes, tubular cored electrodes and the all-weld metal deposits classified to the system based
on the tensile strength and the average impact energy of 27 J for the all-weld metal obtained with
electrode-flux combinations in accordance with this document.
c) Clauses, subclauses and tables which do not have either the suffix letter “A” or the suffix letter “B”
are applicable to all solid wire electrodes, tubular cored electrodes and electrode-flux combinations
classified in accordance with this document.
For comparison purposes, some tables include requirements for electrodes classified in accordance with
both systems, placing individual electrodes from the two systems, which are similar in composition and
properties, on adjacent lines in the particular table. In a particular line of the table that is mandatory in
one system, the symbol for the similar electrode from the other system is indicated in parentheses. By
appropriate restriction of the formulation of a particular electrode, it is often, but not always, possible
to produce an electrode that can be classified in both systems, in which case the electrode, or its
packaging, can be marked with the classification in either or both systems.
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 3690, Welding and allied processes — Determination of hydrogen content in arc weld metal
ISO 6847, Welding consumables — Deposition of a weld metal pad for chemical analysis
© ISO 2017 – All rights reserved 1
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SIST EN ISO 26304:2018
ISO 26304:2017(E)
ISO 13916, Welding — Guidance on the measurement of preheating temperature, interpass temperature
and preheat maintenance temperature
ISO 14174, Welding consumables — Fluxes for submerged arc welding and electroslag welding —
Classification
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 https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Classification
4.1 General
Classification designations are based on two approaches to indicate the tensile properties and the
impact properties of the all-weld metal obtained with a given electrode-flux combination. The two
designation approaches include additional designators for the chemical composition of a solid wire
electrode or the chemical composition of the all-weld metal deposit obtained with a tubular cored
electrode and a specific flux. The two designation approaches include additional designators for some
other classification requirements, but not all, as is clear from the following clauses. A given commercial
product may be classified to the classification requirements in both systems; then either or both
classification designations may be used for the product.
The classification includes the all-weld metal properties obtained with a specific electrode-flux
combination as given in 4.1A and 4.1B. A solid wire electrode shall be classified in accordance with its
chemical composition in Table 3.
A tubular cored electrode shall be classified in accordance with the all-weld metal deposit composition
in Table 4, obtained with a specific flux.
When the solid wire electrode or tubular cored electrode is classified in combination with a flux for
submerged arc welding, the classification shall be prefixed with a symbol in accordance with Clause 5 as
appropriate.
4.1A Classification by yield strength and 47 J 4.1B Classification by tensile strength and
impact energy 27 J impact energy
The classification is divided into seven parts: The classification is divided into six parts:
1) the first part gives a symbol indicating the 1) the first part gives a symbol indicating the
product or process to be identified; product or process to be identified;
2 © ISO 2017 – All rights reserved
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SIST EN ISO 26304:2018
ISO 26304:2017(E)
2) the second part gives a symbol indicating 2) the second part gives a symbol indicating the
the tensile properties of the all-weld metal (see strength and elongation of the all-weld metal in
Table 1A); either the as-welded or the post-weld heat-treat-
ed condition (see Table 1B);
3) the third part gives a symbol indicating the im- 3) the third part gives a symbol indicating
pact properties of the all-weld metal (see Table 2); the impact properties of the all-weld metal in
the same condition as specified for the tensile
strength (see Table 2). The letter “U” after this
designator indicates that the deposit meets an
average optional requirement of 47 J at the des-
ignated impact test temperature;
4) the fourth part gives a symbol indicating the 4) the fourth part gives a symbol indicating the
type of flux used (see 5.4); type of flux used (see 5.4);
5) the fifth part gives a symbol indicating the 5) the fifth part gives a symbol indicating the
chemical composition of the solid wire electrode chemical composition of the solid wire elec-
used (see Table 3) or of the all-weld metal deposit- trode used (see Table 3), or of the all-weld metal
ed by a tubular cored electrode-flux combination deposited by a tubular cored electrode-flux
(see Table 4); combination (see Table 4);
6) the sixth part gives a symbol indicating the 6) the sixth part gives an optional symbol
stress relief treatment if this is applied; indicating the diffusible hydrogen content of
the weld metal determined in accordance with
ISO 3690.
7) the seventh part gives an optional symbol indi-
cating the diffusible hydrogen content of the weld
metal determined in accordance with ISO 3690.
5 Symbols and requirements
5.1 General
A solid wire electrode can be classified separately based on its chemical composition, as specified in
Table 3. The all-weld metal deposit composition and mechanical properties obtained with a particular
solid wire electrode or tubular cored electrode vary somewhat depending on the flux used. Accordingly,
the classification of the all-weld metal deposit obtained with a particular solid wire electrode or
tubular cored electrode can be different for different fluxes. However, deposit composition is only a
classification requirement for tubular cored electrode-flux combinations.
5.2 Symbol for the product or process
The symbol for the electrode-flux combination or weld deposit produced by a solid wire electrode or
by a tubular cored electrode using the submerged arc welding process with a specific flux, shall be the
letter “S” placed at the beginning of the designation.
© ISO 2017 – All rights reserved 3
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SIST EN ISO 26304:2018
ISO 26304:2017(E)
5.2A Classification by yield strength and 47 J 5.2B Classification by tensile strength and
impact energy 27 J impact energy
The symbol for the solid wire electrode for use The symbol for the solid wire electrode for use in
in the submerged arc welding process shall be the submerged arc welding process shall be the
the letter “S” placed at the beginning of the solid letters “SU” placed at the beginning of the solid
wire electrode designation. wire electrode designation.
The symbol for the tubular cored electrode for The symbol for the tubular cored electrode for use
use in the submerged arc welding process shall in the submerged arc welding process shall be the
be the letter “T” placed at the beginning of the letters “TU” placed at the beginning of the tubular
tubular cored electrode designation. cored electrode designation.
5.3 Symbols for the tensile properties of the all-weld metal deposit
5.3A Classification by yield strength and 5.3B Classification by tensile strength and
47 J impact energy 27 J impact energy
The symbols in Table 1A indicate the yield The symbols in Table 1B indicate the tensile
strength, tensile strength, and elongation of the strength, yield strength, and elongation of the
all-weld metal in the as-welded condition or after all-weld metal in the as-welded condition or in
stress relief treatment in accordance with 5.6A, the post-weld heat-treated condition in accord-
determined in accordance with Clause 6 (A-side). ance with 5.6B, determined in accordance with
Clause 6 (B-side).
Table 1A — Symbol for the tensile Table 1B — Symbol for the tensile
properties (Classification by yield strength and properties (Classification by tensile strength and
47 J impact energy) 27 J impact energy)
a
Minimum Minimum
b
Tensile Minimum Tensile Minimum
a a
Symbol yield Symbol yield
c
strength elongation strength elongation
b
strength strength
MPa MPa % MPa MPa %
55 550 640 to 820 18 59X 490 590 to 790 16
62 620 700 to 890 18 62X 500 620 to 820 15
69 690 770 to 940 17 69X 550 690 to 890 14
79 790 880 to 1 080 16 76X 670 760 to 960 13
89 890 940 to 1 180 15 78X 670 780 to 980 13
a
For yield strength, the lower yield strength,
R , is used when yielding occurs, otherwise the 83X 740 830 to 1 030 12
eL
0,2 % proof strength, R , is used.
p0,2
b a
Gauge length is equal to five times the test X is “A” or “P”, where “A” indicates testing in the
specimen diameter. as-welded condition and “P” indicates testing in the
post-weld heat-treated condition.
b
For yield strength, the 0,2 % proof strength,
R , is used.
p0,2
c
Gauge length is equal to five times the test spec-
imen diameter.
4 © ISO 2017 – All rights reserved
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SIST EN ISO 26304:2018
ISO 26304:2017(E)
5.4 Symbol for the impact properties of the all-weld metal
The symbols in Table 2 indicate the temperature at which an average impact energy of 47 J or 27 J is
achieved under the conditions given in Clause 6 in the as-we
...
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