SIST EN ISO 26304:2011
(Main)Welding consumables - Solid wire electrodes, tubular cored electrodes and electrode-flux combinations for submerged arc welding of high strength steels - Classification (ISO 26304:2008, including Cor 1:2009)
Welding consumables - Solid wire electrodes, tubular cored electrodes and electrode-flux combinations for submerged arc welding of high strength steels - Classification (ISO 26304:2008, including Cor 1:2009)
This International Standard specifies requirements for classification of solid wire electrodes, tubular cored electrodes, and electrode/flux combinations (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 upon the yield strength and average impact energy of 47 J for all-weld metal, or utilizing a system based upon the tensile strength and average impact energy of 27 J for all-weld metal.
1) Paragraphs and tables which carry the suffix letter “A” are applicable only to solid wire electrodes,
tubular cored electrodes and all-weld metal deposits classified to the system based upon the yield
strength and the average impact energy of 47 J for all-weld metal obtained with electrode/flux
combinations in accordance with this International Standard.
2) Paragraphs and tables which carry the suffix letter “B” are applicable only to solid wire electrodes,
tubular cored electrodes and all-weld metal deposits classified to the system based upon the tensile
strength and the average impact energy of 27 J for all-weld metal obtained with electrode/flux
combinations in accordance with this International Standard.
3) Paragraphs 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 International Standard.
Schweißzusätze - Massivdrahtelektroden, Fülldrahtelektroden und Drahtpulver-Kombinationen zum Unterpulverschweißen von hochfesten Stählen - Einteilung (ISO 26304:2008)
Diese Internationale Norm legt Anforderungen zur Einteilung von Massivdrahtelektroden, Fülldrahtelektroden und Draht/Pulver-Kombinationen (reines Schweißgut) im Schweißzustand und nach Wärmenachbehandlung zum Unterpulverschweißen von hochfesten Stählen mit einer Mindeststreckgrenze über 500 MPa oder einer Mindestzugfestigkeit über 570 MPa fest. Ein Pulver kann mit verschiedenen Massivdraht-/Fülldrahtelektroden geprüft und eingestuft werden. Eine Drahtelektrode kann mit verschiedenen Schweißpulvern geprüft und eingeteilt werden. Die Massivdrahtelektrode kann auch gesondert nach ihrer chemischen Zusammensetzung eingeteilt werden.
Diese Norm enthält eine gemeinsame Spezifikation zur Einteilung entweder nach der Streckgrenze und der durchschnittlichen Kerbschlagarbeit von 47 J des reinen Schweißgutes oder nach der Zugfestigkeit und der durchschnittlichen Kerbschlagarbeit von 27 J des reinen Schweißgutes.
1) Abschnitte und Tabellen, gekennzeichnet durch ein nachgestelltes “A”, können nur für Massiv- -drahtelektroden, Fülldrahtelektroden und reines Schweißgut angewendet werden, die nach der Streckgrenze und der durchschnittlichen Kerbschlagarbeit von 47 J des reinen Schweißgutes eingeteilt werden, das mit einer Draht/Pulver-Kombination nach dieser Internationalen Norm hergestellt wurde.
2) Abschnitte und Tabellen, gekennzeichnet durch ein nachgestelltes “B”, können nur für Massiv- -drahtelektroden, Fülldrahtelektroden und reines Schweißgut angewendet werden, die nach der Zugfestigkeit und der durchschnittlichen Kerbschlagarbeit von 27 J des reinen Schweißgutes eingeteilt werden, das mit einer Draht/Pulver-Kombination nach dieser Internationalen Norm hergestellt wurde.
Abschnitte und Tabellen, die kein nachgestelltes “A” oder “B” enthalten, sind für alle Massivdraht¬elektroden, Fülldrahtelektroden und Draht/Pulver-Kombinationen anwendbar, die nach dieser Internationalen Norm eingeteilten werden.
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 26304:2008, Cor 1:2009 inclus)
L'ISO 26304:2008 sp�cifie les exigences relatives � la classification des fils-�lectrodes pleins, des fils-�lectrodes fourr�s et des couples fils-flux (d�p�ts en m�tal fondu hors dilution) � l'�tat brut de soudage ou apr�s traitement thermique apr�s soudage, pour le soudage � l'arc sous flux des aciers � haute r�sistance ayant soit une limite d'�lasticit� minimale sup�rieure � 500 MPa, soit une r�sistance � la traction minimale sup�rieure � 570 MPa. Un flux peut �tre classifi� avec diff�rents fils-�lectrodes. Un fil-�lectrode peut-�tre soumis aux essais et �tre classifi� avec diff�rents flux. Le fil-�lectrode plein est �galement classifi� s�par�ment d'apr�s sa composition chimique.
L'ISO 26304:2008 propose une sp�cification mixte permettant une classification utilisant un syst�me fond� soit sur la limite d'�lasticit� et l'�nergie de rupture moyenne de 47 J pour le m�tal fondu hors dilution, soit sur la r�sistance � la traction et l'�nergie de rupture moyenne de 27 J pour le m�tal fondu hors dilution.
Dodajni in potrošni materiali za varjenje - Žice, strženske žice in kombinacije žic in praškov za varjenje visokotrdnih jekel po EPP - Razvrstitev (ISO 26304:2008, vključno s popravkom 1:2009)
Ta mednarodni standard določa zahteve za razvrstitev žic, strženskih žic in kombinacije žic/praškov (depozitov čistega vara) v varjenem stanju in s toplotno obdelavo po varjenju pri obločnem varjenju pod praškom visokotrdnih jekel z minimalno mejo prožnosti nad 500 MPa ali minimalno natezno trdnostjo nad 570 MPa. En prašek je lahko preskušen in razvrščen z različnimi žicami. Ena žica je lahko preskušena in razvrščena z različnimi praški. Žica se razvrsti tudi ločeno na osnovi kemične sestave. Ta dokument podaja kombinirano specifikacijo, ki omogoča razvrstitev z uporabo sistema na osnovi meje prožnosti in povprečne udarne energije čistega vara 47 J ali z uporabo sistema na podlagi natezne trdnosti in povprečne udarne energije čistega vara 27 J.
1) Odstavki in razpredelnice, ki so označeni z dodatno črko »A«, veljajo le za žice, strženske žice in depozite čistega vara, razvrščene po sistemu na osnovi meje prožnosti in povprečne udarne energije čistega vara 47 J, dobljene s kombinacijami žic/praškov v skladu s tem mednarodnim standardom.
2) Odstavki in razpredelnice, označeni z dodatno črko »B«, veljajo le za žice, strženske žice in depozite čistega vara, razvrščene po sistemu na osnovi natezne trdnosti in povprečne udarne energije čistega vara 27 J, dobljene s kombinacijami žic/praškov v skladu s tem mednarodnim standardom.
3) Odstavki in razpredelnice brez dodatne črke »A« ali »B« veljajo za vse žice, strženske žice in kombinacije žic/praškov, razvrščene v skladu s tem mednarodnim standardom.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 26304:2011
01-maj-2011
1DGRPHãþD
SIST EN 14295:2004
'RGDMQLLQSRWURãQLPDWHULDOL]DYDUMHQMHäLFHVWUåHQVNHåLFHLQNRPELQDFLMHåLFLQ
SUDãNRY]DYDUMHQMHYLVRNRWUGQLKMHNHOSR(335D]YUVWLWHY ,62
YNOMXþQRVSRSUDYNRP
Welding consumables - Solid wire electrodes, tubular cored electrodes and electrode-flux
combinations for submerged arc welding of high strength steels - Classification (ISO
26304:2008, including Cor 1:2009)
Schweißzusätze - Massivdrahtelektroden, Fülldrahtelektroden und Drahtpulver-
Kombinationen zum Unterpulverschweißen von hochfesten Stählen - Einteilung (ISO
26304:2008)
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 26304:2008, Cor 1:2009 inclus)
Ta slovenski standard je istoveten z: EN ISO 26304:2009
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
SIST EN ISO 26304:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 26304:2011
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SIST EN ISO 26304:2011
EUROPEAN STANDARD
EN ISO 26304
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2009
ICS 25.160.20 Supersedes EN 14295:2003
English Version
Welding consumables - Solid wire electrodes, tubular cored
electrodes and electrode-flux combinations for submerged arc
welding of high strength steels - Classification (ISO 26304:2008,
including Cor 1:2009)
Produits consommables pour le soudage - Fils-électrodes Schweißzusätze - Massivdrahtelektroden,
pleins, fils-électrodes fourrés et couples électrodes-flux Fülldrahtelektroden und Draht/Pulver-Kombinationen zum
pour le soudage à l'arc sous flux des aciers à haute Unterpulverschweißen von hochfesten Stählen - Einteilung
résistance - Classification (ISO 26304:2008, Cor 1:2009 (ISO 26304:2008, einschließlich Cor 1:2009)
inclus)
This European Standard was approved by CEN on 6 August 2009.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 26304:2009: E
worldwide for CEN national Members.
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SIST EN ISO 26304:2011
EN ISO 26304:2009 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 26304:2011
EN ISO 26304:2009 (E)
Foreword
The text of ISO 26304:2008, including Cor 1:2009 has been prepared by Technical Committee ISO/TC 44
“Welding and allied processes” of the International Organization for Standardization (ISO) and has been taken
over as EN ISO 26304:2009 by Technical Committee CEN/TC 121 “Welding” 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 January 2010, and conflicting national standards shall be withdrawn at
the latest by January 2010.
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 14295:2003.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 26304:2008, including Cor 1:2009 has been approved by CEN as a EN ISO 26304:2009
without any modification.
3
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SIST EN ISO 26304:2011
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SIST EN ISO 26304:2011
INTERNATIONAL ISO
STANDARD 26304
First edition
2008-11-15
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 26304:2008(E)
©
ISO 2008
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SIST EN ISO 26304:2011
ISO 26304:2008(E)
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Published in Switzerland
ii © ISO 2008 – All rights reserved
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SIST EN ISO 26304:2011
ISO 26304:2008(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 Symbols for the tensile properties of the all-weld metal deposit . 3
4.3 Symbol for the impact properties of all-weld metal . 4
4.4 Symbol for the type of welding flux. 5
4.5 Symbol for the chemical composition of solid wire electrodes and of all-weld metal from
tubular cored electrode/flux combinations. 5
4.6 Symbol for the post weld heat treatment .10
4.7 Symbol for hydrogen content of deposited metal. 12
4.8 Rounding off procedure. 12
5 Mechanical tests . 12
5.1 General. 12
5.2 Preheating and interpass temperature. 12
5.3 Welding conditions and pass sequence . 13
6 Chemical analysis. 14
7 Retests . 14
8 Technical delivery conditions . 14
9 Examples of designation . 14
Annex A (informative) Possible risk of weld metal hydrogen cracking. 17
Bibliography . 18
© ISO 2008 – All rights reserved iii
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SIST EN ISO 26304:2011
ISO 26304:2008(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 26304 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 3, Welding consumables.
Requests for official interpretations of technical aspects of this International Standard should be directed to the
Secretariat of ISO/TC 44/SC 3 via the user's national standardization body; a listing of these bodies can be
found at www.iso.org.
iv © ISO 2008 – All rights reserved
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SIST EN ISO 26304:2011
ISO 26304:2008(E)
Introduction
This International Standard provides a classification in order to designate 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. The ratio of yield to tensile strength of weld
metal is generally higher than that of parent metal. Users should note that matching weld metal yield strength
to parent metal yield strength will not necessarily ensure that the weld metal tensile strength matches that of
the parent material. Where the application requires matching tensile strength therefore, 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 may have the same grading,
the combination of an electrode with a flux from one manufacturer versus the flux from another manufacturer,
both fluxes having the same classification, may not be interchangeable unless verified according to this
International Standard. Two tubular cored wires of the same classification may likewise produce different
results with the same flux.
It should be noted that the mechanical properties of all-weld metal test specimens used to classify the
electrode/flux combinations will vary from those obtained in production joints because of differences in welding
procedure such as electrode size, width of weave, welding position and material composition.
ISO 26304 was prepared with assistance from the International Institute of Welding, Commission II. It
recognizes that there are two somewhat different approaches in the global market to classifying a given 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 according to this International Standard. The classification according to
system A is mainly based on EN 14295. The classification according to system B is mainly based upon
standards used around the Pacific Rim. Future revisions will aim to merge the two approaches into a single
classification system.
© ISO 2008 – All rights reserved v
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SIST EN ISO 26304:2011
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SIST EN ISO 26304:2011
INTERNATIONAL STANDARD ISO 26304:2008(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 International Standard specifies requirements for classification of solid wire electrodes, tubular cored
electrodes, and electrode/flux combinations (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 upon the yield
strength and average impact energy of 47 J for all-weld metal, or utilizing a system based upon the tensile
strength and average impact energy of 27 J for all-weld metal.
1) Paragraphs and tables which carry the suffix letter “A” are applicable only to solid wire electrodes,
tubular cored electrodes and all-weld metal deposits classified to the system based upon the yield
strength and the average impact energy of 47 J for all-weld metal obtained with electrode/flux
combinations in accordance with this International Standard.
2) Paragraphs and tables which carry the suffix letter “B” are applicable only to solid wire electrodes,
tubular cored electrodes and all-weld metal deposits classified to the system based upon the tensile
strength and the average impact energy of 27 J for all-weld metal obtained with electrode/flux
combinations in accordance with this International Standard.
3) Paragraphs 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 International Standard.
2 Normative references
The following referenced documents are indispensable for the application 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 31-0:1992, Quantities and units — Part 0: General principles
ISO 544, Welding consumables — Technical delivery conditions for welding filler metals — Type of product,
dimensions, tolerances and marking
ISO 3690, Welding and allied processes — Determination of hydrogen content in ferritic steel arc weld metal
ISO 6847, Welding consumables — Deposition of a weld metal pad for chemical analysis
ISO 13916, Welding — Guidance on the measurement of preheating temperature, interpass temperature and
preheat maintenance temperature
© ISO 2008 – All rights reserved 1
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SIST EN ISO 26304:2011
ISO 26304:2008(E)
ISO 14174, Welding consumables — Fluxes for submerged arc welding — Classification
ISO 14344, Welding and allied processes — Flux and gas shielded electrical welding processes —
Procurement guidelines for consumables
ISO 15792-1:2000, Welding consumables — Test methods — Part 1: Test methods for all-weld metal test
specimens in steel, nickel and nickel alloys
3 Classification
Classification designations are based upon 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 also 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 particular flux.
The two designation approaches include additional designators for some other classification requirements, but
not all, as will be clear from the following sections. 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 all-weld metal properties obtained with a specific electrode/flux combination as
given below. A solid wire electrode shall be classified according to its chemical composition in Table 4.
A tubular cored electrode shall be classified according to the all-weld metal deposit composition in Table 5,
obtained with a particular 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 4 as appropriate.
3.1A Classification by yield strength and 47 J 3.1B 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/process to be identified; product/process to be identified;
2) the second part gives a symbol indicating 2) the second part gives a symbol indicating
the tensile properties of all-weld metal the strength and elongation of the all-weld
(see Table 1A); metal in either the as-welded or the post
weld heat treated condition (see Table 1B);
3) the third part gives a symbol indicating the 3) the third part gives a symbol indicating the
impact properties of all-weld metal impact properties of all-weld metal in the
(see Table 2); 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 designated impact test
temperature;
4) the fourth part gives a symbol indicating 4) the fourth part gives a symbol indicating
the type of flux used (see Table 3); the type of flux used (see Table 3);
2 © ISO 2008 – All rights reserved
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SIST EN ISO 26304:2011
ISO 26304:2008(E)
5) the fifth part gives a symbol indicating the 5) the fifth part gives a symbol indicating the
chemical composition of the solid wire chemical composition of the solid wire
electrode used (see Table 4) or of the all- electrode used (see Table 4), or of the
weld metal deposited by a tubular cored all-weld metal deposited by a tubular cored
electrode/flux combination (see Table 5); electrode/flux combination (see Table 5);
6) the sixth part gives a symbol indicating the 6) the sixth part gives a symbol indicating the
stress relief treatment in case this is diffusible hydrogen content of the weld
applied; metal obtained in accordance with
ISO 3690.
7) the seventh part gives a symbol indicating
the diffusible hydrogen content of the weld
metal obtained in accordance with
ISO 3690.
4 Symbols and requirements
A solid wire electrode can be classified separately based upon its chemical composition, as specified in
Table 4. The all-weld metal deposit composition and mechanical properties obtained with a particular solid
wire electrode or tubular cored electrode will vary somewhat depending upon the flux used. Accordingly, the
classification of the all-weld metal deposit obtained with a particular solid wire electrode or tubular cored
electrode may be different for different fluxes. However, deposit composition is only a classification
requirement for tubular cored electrode/flux combinations.
4.1 Symbol for the product/process
The symbol for the electrode/flux combination and/or weld deposit produced by a solid wire electrode or by a
tubular cored electrode using the submerged arc welding process with a particular flux, shall be the letter S
placed at the beginning of the designation.
4.1A Classification by yield strength and 47 J 4.1B Classification by tensile strength and
impact energy 27 J impact energy
The symbol for the solid wire electrode for use in the The symbol for the solid wire electrode for use in the
submerged arc welding process shall be the letter S submerged arc welding process shall be the
placed at the beginning of the solid wire electrode letters SU placed at the beginning of the solid wire
designation. electrode designation.
The symbol for the tubular cored electrode for use in The symbol for the tubular cored electrode for use in
the submerged arc welding process shall be the the submerged arc welding process shall be the
letter T placed at the beginning of the tubular cored letters TU placed at the beginning of the tubular
electrode designation. cored electrode designation.
4.2 Symbols for the tensile properties of the all-weld metal deposit
4.2A Classification by yield strength and 47 J 4.2B Classification by tensile strength and
impact energy 27 J impact energy
The symbol in Table 1A indicates yield strength, The symbols in Table 1B indicate the tensile
tensile strength and elongation of the all-weld metal strength, yield strength and elongation of the all-
in the as-welded condition or after stress relief weld metal in the as-welded condition or in the post
treatment as described in 4.6, determined in weld heat treated condition determined in
accordance with Clause 5. accordance with 5.1B, with a particular flux.
© ISO 2008 – All rights reserved 3
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SIST EN ISO 26304:2011
ISO 26304:2008(E)
Table 1A — Symbol for the tensile properties
Table 1B — Symbol for the tensile properties
(classification by yield strength and
(classification by tensile strength and
47 J impact energy)
27 J impact energy)
a b b b
Minimum Tensile Minimum Minimum Tensile Minimum
a
Symbol yield strength strength elongation Symbol yield strength strength elongation
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
83X 740 830 to 1 030 12
a
For yield strength, the lower yield (ReL) shall be used when
a
yielding occurs, otherwise the 0,2% proof strength (Rp 0,2)
X is “A” or “P”, where “A” indicates testing in the as-welded
shall be used.
condition and “P” indicates testing in the post weld heat-treated
condition
b
Gauge length is five times the test specimen diameter.
b
Yield strength at 0,2 % offset and gauge length is five times
the test specimen diameter.
4.3 Symbol for the impact properties of all-weld metal
The symbol in Table 2 indicates the temperature at which an average impact energy of 47 J or 27 J is
achieved under the conditions given in Clause 5 in the as-welded condition or after post weld heat treatment.
4.3A Classification by yield strength and 47 J 4.3B Classification by tensile strength and
impact energy 27 J impact energy
Three test specimens shall be tested. The average Five test specimens shall be tested. The lowest and
value shall be at least 47 J. Only one individual highest values obtained shall be disregarded. Two
value may be lower than 47 J but not lower than of the three remaining values shall be greater than
32 J. the specified 27 J level, one of the three may be
lower but shall not be less than 20 J. The average of
the three remaining values shall be at least 27 J.
The addition of the optional symbol U, immediately
after the symbol for condition of heat treatment,
indicates that the supplemental requirement of 47 J
impact energy at the normal 27 J impact test
temperature has also been satisfied. For the 47 J
impact requirement, the number of specimens
tested and values obtained shall meet the
requirement of 4.3A.
4 © ISO 2008 – All rights reserved
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SIST EN ISO 26304:2011
ISO 26304:2008(E)
Table 2 — Symbol for the impact properties of all-weld metal
Temperature for minimum
a, b b
average impact energy of 47 J or 27 J
Symbol
°C
Z No requirements
a b
A or Y + 20
0 0
2 − 20
3 − 30
4 − 40
5 − 50
6 − 60
a
When classified in accordance with 4.3A.
b
When classified in accordance with 4.3B.
4.4 Symbol for the type of welding flux
The symbols in Table 3 indicate the types of welding flux in accordance with ISO 14174.
Table 3 — Symbol for type of welding flux
Type of flux Symbol
Manganese-silicate MS
Calcium-silicate CS
Calcium-magnesium CG
Calcium-magnesium-basic CB
Calcium-magnesium-iron CI
Calcium-magnesium-iron-basic IB
Zirconium-silicate ZS
Rutile-silicate RS
Aluminate-rutile AR
Aluminate-basic AB
Aluminate-silicate AS
Aluminate-fluoride-basic AF
Fluoride-basic FB
Any other type Z
4.5 Symbol for the chemical composition of solid wire electrodes and of all-weld metal from
tubular cored electrode/flux combinations
The symbol in Table 4 indicates the chemical composition of the solid wire electrode, determined under the
conditions given in Clause 6.
© ISO 2008 – All rights reserved 5
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SIST EN ISO 26304:2011
ISO 26304:2008(E)
The symbol in Table 5 indicates the chemical composition of the all-weld metal deposit obtained with the
tubular cored electrode and a particular flux, determined under the conditions given in Clause 6.
Table 4 — Chemical composition requirements for solid wire electrodes
Symbol for chemical
a
Chemical composition % (by mass)
composition
ISO 26304-A, ISO 26304-B,
Classification Classification
by yield by tensile
b
C Si Mn P S Cr Ni Mo Cu V Other
strength and strength and
47 J impact 27 J impact
energy energy
0,10 1,70 0,40 0,40
c, d
SUN1M3 to 0,20 to 0,025 0,025 — to to 0,35 — —
0,18 2,40 0,80 0,65
0,05 1,20 0,75 0,10
c, d
SUN2M1 0,12 to to 0,020 0,020 0,20 to to 0,35
0,30 1,60 1,25 0,30
0,80 0,80 0,40
c, d
SUN2M3 0,15 0,25 to 0,020 0,020 0,20 to to 0,40
1,40 1,20 0,65
1,30 0,80
...
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