EN ISO 18276:2024
(Main)Welding consumables - Tubular cored electrodes for gas-shielded and non-gas-shielded metal arc welding of high strength steels - Classification (ISO 18276:2024)
Welding consumables - Tubular cored electrodes for gas-shielded and non-gas-shielded metal arc welding of high strength steels - Classification (ISO 18276:2024)
This document specifies the requirements for classification of tubular cored electrodes with or without a gas shield for metal arc welding of high-strength steels in the as-welded condition or in the post-weld heat-treated condition with a minimum yield strength higher than 550 MPa or a minimum tensile strength higher than 590 MPa. One tubular cored electrode can be tested and classified with different shielding gases, if used with more than one.
This document is a combined specification providing classification utilizing a system based upon the yield strength and an average impact energy of 47 J of the all-weld metal, or utilizing a system based upon the tensile strength and an average impact energy of 27 J of the all-weld metal.
— Subclauses and tables which carry the suffix “system A” are applicable only to tubular cored electrodes classified under the system based upon the yield strength and an average impact energy of 47 J of the all-weld metal given in this document.
— Subclauses and tables which carry the suffix “system B” are applicable only to tubular cored electrodes classified under the system based upon the tensile strength and an average impact energy of 27 J of the all-weld metal given in this document.
— Subclauses and tables which do not have either the suffix “system A” or the suffix “system B” are applicable to all tubular cored electrodes classified under this document.
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 document, pulsed current is not used for determining the electrode classification.
Schweißzusätze - Fülldrahtelektroden zum Metall-Lichtbogenschweißen mit und ohne Schutzgas von hochfesten Stählen - Einteilung (ISO 18276:2024)
Dieses Dokument legt die Anforderungen für die Einteilung von Fülldrahtelektroden zum Metall-Lichtbogenschweißen von hochfesten Stählen mit oder ohne Gasschutz mit einer Mindeststreckgrenze über 550 MPa oder einer Mindestzugfestigkeit über 590 MPa im Schweißzustand oder nach einer Wärmenachbehandlung fest. Eine Fülldrahtelektrode kann mit verschiedenen Schutzgasen geprüft und eingeteilt werden, falls sie mit mehr als einem Schutzgas angewendet wird.
Dieses Dokument enthält gemeinsame Anforderungen zur Einteilung des reinen Schweißgutes entweder nach der Streckgrenze und der durchschnittlichen Kerbschlagarbeit von 47 J oder nach der Zugfestigkeit und der durchschnittlichen Kerbschlagarbeit von 27 J.
- Unterabschnitte und Tabellen, gekennzeichnet durch ein nachgestelltes „System A“, sind nur für Fülldrahtelektroden anwendbar, die nach der Streckgrenze und einer durchschnittlichen Kerbschlagarbeit von 47 J des reinen Schweißgutes nach diesem Dokument eingeteilt werden.
- Unterabschnitte und Tabellen, gekennzeichnet durch ein nachgestelltes „System B“, sind nur für Fülldrahtelektroden anwendbar, die nach der Zugfestigkeit und einer durchschnittlichen Kerbschlagarbeit von 27 J des reinen Schweißgutes nach diesem Dokument eingeteilt werden.
- Unterabschnitte und Tabellen, die weder ein nachgestelltes „System A“ noch „System B“ enthalten, sind für alle nach diesem Dokument eingeteilten Fülldrahtelektroden anwendbar.
Es ist bekannt, dass die Schweißeigenschaften von Fülldrahtelektroden durch die Anwendung von pulsierendem Strom beeinflusst werden können, jedoch ist in diesem Dokument pulsierender Strom nicht für die Einteilung der Fülldrahtelektroden vorgesehen.
Produits consommables pour le soudage - Fils-électrodes fourrés pour le soudage à l'arc avec ou sans gaz de protection des aciers à haute résistance - Classification (ISO 18276:2024)
Le présent document spécifie les exigences relatives à la classification des fils-électrodes fourrés pour soudage à l'arc avec ou sans gaz de protection pour l’état brut de soudage ou pour l’état traité thermiquement après soudage des aciers à haute résistance ayant une limite d'élasticité minimale supérieure à 550 MPa ou une résistance à la traction minimale supérieure à 590 MPa. Un fil-électrode peut, le cas échéant, être essayé et classifié avec différents gaz de protection.
Le présent document propose 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 du métal fondu hors dilution, soit sur la résistance à la traction et l'énergie de rupture moyenne de 27 J du métal fondu hors dilution.
— Les paragraphes et les tableaux qui portent le suffixe «système A» ne sont applicables qu'aux fils-électrodes fourrés classifiés d'après le système basé sur la limite d'élasticité et l'énergie de rupture moyenne de 47 J du métal fondu hors dilution conformément au présent document.
— Les paragraphes et les tableaux qui portent le suffixe « système B» ne sont applicables qu'aux fils-électrodes fourrés classifiés d'après le système basé sur la résistance à la traction et l'énergie de rupture moyenne de 27 J du métal fondu hors dilution conformément au présent document.
— Les paragraphes et les tableaux qui ne portent ni le suffixe «système A», ni le suffixe «système B», sont applicables à tous les fils-électrodes fourrés classifiés conformément au présent document.
Il est reconnu que les caractéristiques d’emploi des fils-électrodes fourrés peuvent être modifiées par l’utilisation de courant pulsé mais, pour les besoins du présent document, le courant pulsé n'est pas utilisé pour la détermination de la classification d'un fil-électrode.
Dodajni in pomožni materiali za varjenje - Strženske žice za obločno varjenje nerjavnih in ognjeodpornih jekel v zaščitnem plinu in brez zaščite - Razvrščanje (ISO 18276:2024)
Standard ISO 18276:2017 določa zahteve za razvrščanje strženskih žic s plinsko zaščito ali brez nje, ki se uporabljajo za obločno varjenje visokotrdnih jekel v varjenem stanju ali stanju po varjenju s toplotno obdelavo z minimalno mejo prožnosti več kot 550 MPa ali minimalno natezno trdnostjo več kot 590 MPa. Posamezno stržensko žico je mogoče preskusiti in razvrstiti z različnimi zaščitnimi plini, če se uporablja več plinov.
Standard ISO 18276:2017 je kombinirana 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.
– Podtočke in preglednice z dodano črko »A« se uporabljajo samo za strženske žice, ki so razvrščene po sistemu na osnovi meje prožnosti in povprečne energije udarca 47 J za čiste vare, navedene v tem dokumentu.
– Podtočke in preglednice z dodano črko »B« se uporabljajo samo za strženske žice, ki so razvrščene po sistemu na osnovi meje prožnosti in povprečne energije udarca 27 J za čiste vare, navedene v tem dokumentu.
– Podtočke in preglednice brez dodane črke »A« ali »B« se uporabljajo za vse strženske žice, ki so razvrščene v skladu s tem dokumentom.
Ugotovljeno je, da je mogoče delovne značilnosti strženskih žic spremeniti z uporabo udarnega toka, toda za namene tega dokumenta se udarni tok ne uporablja za določanje razvrstitve žice.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2024
Nadomešča:
SIST EN ISO 18276:2017
Dodajni in pomožni materiali za varjenje - Strženske žice za obločno varjenje
nerjavnih in ognjeodpornih jekel v zaščitnem plinu in brez zaščite - Razvrščanje
(ISO 18276:2024)
Welding consumables - Tubular cored electrodes for gas-shielded and non-gas-shielded
metal arc welding of high strength steels - Classification (ISO 18276:2024)
Schweißzusätze - Fülldrahtelektroden zum Metall-Lichtbogenschweißen mit und ohne
Schutzgas von hochfesten Stählen - Einteilung (ISO 18276:2024)
Produits consommables pour le soudage - Fils-électrodes fourrés pour le soudage à l'arc
avec ou sans gaz de protection des aciers à haute résistance - Classification (ISO
18276:2024)
Ta slovenski standard je istoveten z: EN ISO 18276:2024
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 18276
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2024
EUROPÄISCHE NORM
ICS 25.160.20 Supersedes EN ISO 18276:2017
English Version
Welding consumables - Tubular cored electrodes for gas-
shielded and non-gas-shielded metal arc welding of high
strength steels - Classification (ISO 18276:2024)
Produits consommables pour le soudage - Fils- Schweißzusätze - Fülldrahtelektroden zum Metall-
électrodes fourrés pour le soudage à l'arc avec ou sans Lichtbogenschweißen mit und ohne Schutzgas von
gaz de protection des aciers à haute résistance - hochfesten Stählen - Einteilung (ISO 18276:2024)
Classification (ISO 18276:2024)
This European Standard was approved by CEN on 5 July 2024.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18276:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 18276:2024) 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 AFNOR.
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 2025, and conflicting national standards shall
be withdrawn at the latest by January 2025.
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 18276:2017.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 18276:2024 has been approved by CEN as EN ISO 18276:2024 without any modification.
International
Standard
ISO 18276
Third edition
Welding consumables — Tubular
2024-07
cored electrodes for gas-shielded
and non-gas-shielded metal arc
welding of high strength steels —
Classification
Produits consommables pour le soudage — Fils-électrodes
fourrés pour le soudage à l'arc avec ou sans gaz de protection des
aciers à haute résistance — Classification
Reference number
ISO 18276:2024(en) © ISO 2024
ISO 18276:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 18276:2024(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification . 2
4.1 General .2
4.2 Classification systems .2
4.3 Compulsory and optional sections in classifications .3
5 Symbols and requirements . 4
5.1 Symbol for the product or process .4
5.2 Symbol for tensile properties of all-weld metal .4
5.3 Symbol for impact properties of all-weld metal .5
5.4 Symbol for chemical composition of all-weld metal.6
5.5 Symbol for type of electrode core – Classification by yield strength and 47 J impact
energy – System A . .10
5.6 Symbol for usability characteristics of the electrodes – Classification by tensile
strength and 27 J impact energy – System B .10
5.7 Symbol for shielding gas .11
5.8 Symbol for welding position .11
5.9 Symbol for hydrogen content of deposited metal.11
5.10 Symbol for conditions of post-weld heat treatment . 12
5.10.1 Classification by yield strength and 47 J impact energy – System A . 12
5.10.2 Classification by tensile strength and 27 J impact energy – System B . 12
6 Rounding procedure .12
7 Mechanical tests .12
7.1 General . 12
7.2 Preheating and interpass temperatures . 12
7.3 Pass sequence . 13
7.4 Post-weld heat treatment (PWHT) condition .14
7.4.1 Classification by yield strength and 47 J impact energy – System A .14
7.4.2 Classification by tensile strength and 27 J impact energy – System B .14
8 Chemical analysis . . 14
9 Retesting . 14
10 Technical delivery conditions .15
11 Examples of designations .15
11.1 General . 15
11.2 Example 1 - Classification by yield strength and 47 J impact energy – System A . 15
11.3 Example 2 - Classification by tensile strength and 27 J impact energy – System B . 15
11.4 Example 3 – Classification by yield strength and 47 J impact energy - System A .16
11.5 Example 4 – Classification by tensile strength and 27 J impact energy – System B .17
Annex A (informative) Classification systems . 19
Annex B (informative) Description of composition designations for electrodes in the
classification system based upon tensile strength and average impact energy of 27 J –
System B .22
Annex C (informative) Description of types of electrode core in the classification system based
upon yield strength and average impact energy of 47 J – System A .23
iii
ISO 18276:2024(en)
Annex D (informative) Descriptions of types of usability characteristics in the classification
system based upon tensile strength and average impact energy of 27 J – System B .24
Annex E (informative) Notes on hydrogen content .26
Bibliography .27
iv
ISO 18276:2024(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of 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 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, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 121, Welding and allied processes, in accordance with the Agreement on
technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 18276:2017), which has been technically
revised.
The main changes are as follows:
— document has been reformatted in single column format. Some clauses and subclauses have been merged
or separated and some tables have been merged;
— dated normative references have been updated to the latest editions;
— Tables 3A and 3B have been revised and merged and is now Table 6;
— sub-clause 5.7 has been revised and is now 5.8;
— Clause 11 contains new designation examples.
Any feedback or questions on this document should be directed to the user’s
national standards body. A complete listing of these bodies can be found at
www.iso.org/members.html. Official interpretations of ISO/TC 44 documents, where they exist, are
available from this page: https://committee.iso.org/sites/tc44/home/interpretation.html.
v
ISO 18276:2024(en)
Introduction
This document proposes a classification system for tubular cored electrodes in terms of the tensile
properties, impact properties, chemical composition of the all-weld metal, type of electrode core, shielding
gas and welding position. The ratio of yield strength to tensile strength of the weld metal is generally higher
than that of the parent metal. 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 metal. Where the
application requires matching tensile strength, therefore, selection of the consumable should be made by
reference to columns 3 and 7 of Table 3.
Note that the mechanical properties of all-weld metal test specimens used to classify tubular cored
electrodes differ from those obtained with production joints because of differences in welding procedure,
such as electrode size, width of weave, welding position and parent metal composition.
The classification in accordance with system A is mainly based on EN 12535. The classification in accordance
with system B is mainly based upon standards used around the Pacific Rim.
vi
International Standard ISO 18276:2024(en)
Welding consumables — Tubular cored electrodes for gas-
shielded and non-gas-shielded metal arc welding of high
strength steels — Classification
1 Scope
This document specifies the requirements for classification of tubular cored electrodes with or without a
gas shield for metal arc welding of high-strength steels in the as-welded condition or in the post-weld heat-
treated condition with a minimum yield strength higher than 550 MPa or a minimum tensile strength higher
than 590 MPa. One tubular cored electrode can be tested and classified with different shielding gases, if
used with more than one.
This document is a combined specification providing classification utilizing a system based upon the yield
strength and an average impact energy of 47 J of the all-weld metal, or utilizing a system based upon the
tensile strength and an average impact energy of 27 J of the all-weld metal.
— Subclauses and tables which carry the suffix “system A” are applicable only to tubular cored electrodes
classified under the system based upon the yield strength and an average impact energy of 47 J of the
all-weld metal given in this document.
— Subclauses and tables which carry the suffix “system B” are applicable only to tubular cored electrodes
classified under the system based upon the tensile strength and an average impact energy of 27 J of the
all-weld metal given in this document.
— Subclauses and tables which do not have either the suffix “system A” or the suffix “system B” are applicable
to all tubular cored electrodes classified under this document.
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 document, pulsed current is not used for determining the
electrode classification.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 544, Welding consumables — Technical delivery conditions for filler materials and fluxes — Type of product,
dimensions, tolerances and markings
ISO 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 6947, Welding and allied processes — Welding positions
ISO 13916, Welding — Measurement of preheating temperature, interpass temperature and preheat
maintenance temperature
ISO 14175, Welding consumables — Gases and gas mixtures for fusion welding and allied processes
ISO 14344, Welding consumables — Procurement of filler materials and fluxes
ISO 18276:2024(en)
ISO 15792-1, Welding consumables — Test methods — Part 1: Preparation of all-weld metal test pieces and
specimens in steel, nickel and nickel alloys
ISO 80000-1:2022, Quantities and units — Part 1: General
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Classification
4.1 General
Classification designations are based upon two approaches to indicate the tensile properties and the impact
properties of the all-weld metal obtained with 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 subclauses. In most cases, a given commercial product can be classified under both systems. Then,
either or both classification designations can be used for the product. Annex A gives figures that explain
how the classification systems are structured. Annex B gives information on composition designations for
electrodes in the classification system based upon tensile strength and average impact energy of 27 J.
The classification includes all-weld metal properties obtained with a tubular cored electrode and appropriate
shielding gas combination as given in 4.2. With the exception of the symbol for welding position, the
classification of gas-shielded tubular cored electrodes is based on an electrode size of 1,2 mm or, if this size
is not manufactured, the next largest diameter manufactured and the classification of self-shielded tubular
cored electrodes is based on a diameter of 2,4 mm or the largest diameter manufactured if less than 2,4 mm.
4.2 Classification systems
Each classification system, A and B, is split into nine parts as given in Table 1.
ISO 18276:2024(en)
Table 1 — Parts of the classification systems, A and B
Classification system
Part of classifi-
System A System B
cation designa-
Classification by yield strength and 47 J im- Classification by tensile strength and 27 J
tion
pact energy impact energy
1 T indicates a tubular cored electrode.
symbol indicating the strength and elongation of the all-weld metal in the as-welded or post-weld
heat-treated condition (see Table 3).
symbol indicating the impact properties of the symbol indicating the impact properties of the
all-weld metal (see Table 4 and 5). all-weld metal (see Table 4 and 5).
The symbol “U”, added as an optional supple-
mental designator at or near the end of the
complete tubular cored electrode designation,
indicates that the deposit meets an average
optional requirement of 47 J at the designated
Charpy test temperature.
symbol indicating the chemical composition of symbol indicating the usability characteristics
the all-weld metal (see Table 6) of the electrode (see Table 8)
symbol indicating the type of electrode core (see symbol indicating the welding position (see
Table 7). Table 9).
6 symbol indicating the shielding gas (see 5.7)
symbol indicating the welding position (see symbol indicating the classification tests were
Table 9). conducted in the:
a) as-welded condition (A) or
b) post-weld heat-treated condition (P)
symbol indicating the hydrogen content of the symbol indicating the chemical composition of
deposited metal (see Table 10). the all-weld metal (see Table 6)
symbol indicating the post-weld heat treatment symbol indicating the hydrogen content of the
if this is applied (see 5.10.1). deposited metal (see Table 10).
Electrodes can be classified under any number of classifications for either or both the as-welded and post-
weld heat-treated condition.
In both systems, the electrode classification shall include all the compulsory section and can include the
optional section, as given in 4.3.
4.3 Compulsory and optional sections in classifications
Table 2 gives the compulsory and optional sections in each classification system, A and B.
ISO 18276:2024(en)
Table 2 — Compulsory and optional sections in classifications
Classification system
System A System B
Section
Classification by yield strength and 47 J im- Classification by tensile strength and 27 J
pact energy impact energy
symbols for the: symbols for the:
a) type of product (see 5.1); a) type of product (see 5.1);
b) strength and elongation (see 5.2); b) strength and elongation in the as-welded
condition or post-weld heat-treated
c) impact properties (see 5.3);
condition (see 5.2);
d) chemical composition (see 5.4);
c) welding positions for which the electrode is
Compulsory
suitable (see 5.8);
e) type of electrode core (see 5.5);
d) usability characteristics (see 5.6);
f) shielding gas (see 5.7); and
e) shielding gas (see 5.7);
g) post-weld heat treatment (see 5.10).
f) impact properties (se 5.3); and
g) chemical composition (see 5.4).
symbols for: a) symbol “U” to indicate that the weld metal
will have an average of 47 J impact energy at
a) the welding positions for which the
the classification test temperature (see 5.3);
Optional electrode is suitable (see 5.8); and
and
b) hydrogen content (see 5.9).
b) the symbol for hydrogen content (see 5.9).
The designation, compulsory section and any chosen elements of the optional section shall be used on
packages and in the manufacturer's literature and data sheets.
5 Symbols and requirements
5.1 Symbol for the product or process
The symbol for the tubular cored electrodes used in the metal arc welding process is the letter T.
5.2 Symbol for tensile properties of all-weld metal
The symbols in Table 3 give the, tensile properties of the all-weld metal, determined in accordance with
Clause 7.
ISO 18276:2024(en)
Table 3 — Symbols for tensile properties of all-weld metal
System A — System B —
Classification by yield strength and 47 J impact ener- Classification by tensile strength and 27 J impact
gy energy
Minimum Minimum Tensile Minimum
Tensile Minimum
b
yield yield strength elongation
b
strength elongation
Symbol Symbol
a a
strength strength
MPa %
MPa %
MPa MPa
55 550 640 to 820 18 59 490 590 to 790 16
62 620 700 to 890 18 62 530 620 to 820 15
69 690 770 to 940 17 69 600 690 to 890 14
79 790 880 to 1 080 16 76 680 760 to 960 13
89 890 940 to 1 180 15 78 680 780 to 980 13
96 960 ≥ 1 180 14 83 745 830 to 1 030 12
a
For yield strength, the lower yield (R ) is used when yielding occurs, otherwise the 0,2 % proof strength (R ) is used.
eL p0,2
b
Gauge length is equal to five times the test specimen diameter.
5.3 Symbol for impact properties of all-weld metal
Table 4 gives the requirements for impact properties of the all-weld metal, determined in accordance with
Clause 7.
Table 4 — Requirements for impact properties of all-weld metal
Symbol System A — System B —
Classification by yield strength and 47 J impact Classification by tensile strength and 27 J im-
energy pact energy
Indicates the temperature at which an impact en- Indicates the temperature at which impact energy
ergy of 47 J is achieved under the conditions given of 27 J is achieved in the as-welded condition or
in Clause 7. in the post-weld heat-treated condition under the
conditions given in Clause 7.
Three test specimens shall be tested. Only one in- Five test specimens shall be tested. The lowest and
dividual value can be lower than 47 J but not lower highest values obtained shall be disregarded. Two
than 32 J. of the three remaining values shall be greater than
the specified 27 J level; one of the three can be
See
lower but shall not be less than 20 J. The average of
Table 5
the three remaining values shall be at least 27 J.
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 require-
ment of 5.3, System A.
When an all-weld metal has been classified for a certain temperature, it automatically covers any higher
temperature in Table 5.
ISO 18276:2024(en)
Table 5 — Symbol for impact properties of all-weld metal
Temperature for minimum average im-
a b
pact 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
7 −70
8 −80
a
Classification by yield strength and 47 J impact energy (see Table 4).
b
Classification by tensile strength and 27 J impact energy (see
Table 4).
5.4 Symbol for chemical composition of all-weld metal
The symbols in Table 6 indicate the chemical composition of the all-weld metal, determined in accordance
with Clause 8.
ISO 18276:2024(en)
Table 6 — Symbol for chemical composition of all-weld metal
System A - Classification by yield strength and 47 J impact energy
a, b
Chemical composition, % (by mass)
Symbol
d
C Mn Si P S Ni Cr Mo Other
Ti 0,08
MnMo 0,03 to 0,10 1,4 to 2,0 0,90 0,020 0,020 0,3 0,2 0,3 to 0,6
B 0,005
Mn1Ni 0,03 to 0,10 1,4 to 2,0 0,90 0,020 0,020 0,6 to1,2 0,2 0,2 B 0,005
Mn1,5Ni 0,03 to 0,10 1,1 to 1,8 0,90 0,020 0,020 1,3 to 1,8 0,2 0,2 B 0,005
Mn2,5Ni 0,03 to 0,10 1,1 to 2,0 0,90 0,020 0,020 2,1 to 3,0 0,2 0,2 B 0,005
1NiMo 0,03 to 0,10 1,4 0,90 0,020 0,020 0,6 to 1,2 0,2 0,3 to 0,6 —
1,5NiMo 0,03 to 0,10 1,4 0,90 0,020 0,020 1,2 to 1,8 0,2 0,3 to 0,7 —
2NiMo 0,03 to 0,10 1,4 0,90 0,020 0,020 1,8 to 2,6 0,2 0,3 to 0,7 —
Mn1NiMo 0,03 to 0,10 1,4 to 2,0 0,90 0,020 0,020 0,6 to 1,2 0,2 0,3 to 0,7 —
Mn2NiMo 0,03 to 0,10 1,4 to 2,0 0,90 0,020 0,020 1,8 to 2,6 0,2 0,3 to 0,7 —
Mn2NiCrMo 0,03 to 0,10 1,4 to 2,0 0,90 0,020 0,020 1,8 to 2,6 0,3 to 0,6 0,3 to 0,6 —
Mn2Ni1CrMo 0,03 to 0,10 1,4 to 2,0 0,90 0,020 0,020 1,8 to 2,6 0,6 to 1,0 0,3 to 0,6 —
c
Z Any other agreed composition
System B - Classification by tensile strength and 27 J impact energy
e, f
Symbol Chemical composition, % (by mass)
d, g
C Mn Si P S Ni Cr Mo Other
V 0,05
1N3M1 0,15 1,00 0,80 0,030 0,030 1,00 to 2,00 0,15 0,35
Al 1,8
3M2 0,12 1,25 to 2,00 0,80 0,030 0,030 — — 0,25 to 0,55 —
3M3 0,12 1,00 to 1,75 0,80 0,030 0,030 — — 0,40 to 0,65 —
a
Single values shown in this table are maximum values.
b
Cu ≤ 0,3, Nb ≤ 0,05, V ≤ 0,05.
c
Consumables for which the chemical composition is not listed in this table shall be symbolized similarly and prefixed by the letter Z. The chemical composition ranges are not
specified, therefore it is possible that two electrodes with the same Z classification are not interchangeable.
d
Analysis for B is required to be reported if intentionally added or if it is known to be present at levels greater than 0,001 0 %.
e
The weld metal shall be analysed for the specific elements for which values are shown in this table. If the presence of other elements is indicated in the course of this work, the
amount of those elements shall be determined to ensure that their total (excluding iron) does not exceed 0,50 % (by mass).
f
Al ≤ 1,8 for self-shielded electrodes.
g
Consumables for which the chemical composition is not listed in this table shall be symbolized by the letter G. In order to meet the alloy requirements of G, the all-weld metal
shall contain at least one of the elements. Additional chemical-composition requirements may be agreed between purchaser and supplier. The chemical composition ranges are not
specified and therefore it is possible that two products with the a G classification are not interchangeable.
ISO 18276:2024(en)
Table 6 (continued)
4M2 0,15 1,65 to 2,25 0,80 0,030 0,030 — — 0,25 to 0,55 —
V 0,05
4N1M2 0,15 1,00 to 2,50 0,80 0,030 0,030 0,40 to 1,00 0,20 0,50
Al 1,8
V 0,05
4N3M2 0,15 1,50 to 2,75 0,80 0,030 0,030 0,75 to 2,00 0,20 0,50
Al 1,8
4N4M2 0,12 1,25 to 2,25 0,80 0,030 0,030 1,75 to 2,75 0,20 0,50 Cu 0,50
N1M2 0,15 1,00 to 2,00 0,80 0,030 0,030 0,40 to 1,00 0,20 0,50 V 0,05
V 0,05
N2 0,15 1,00 to 2,00 0,40 0,030 0,030 0,50 to 1,50 0,20 0,20
Al 1,8
N2M1 0,15 2,25 0,80 0,030 0,030 0,40 to 1,50 0,20 0,35 V 0,05
N2M2 0,15 2,25 0,80 0,030 0,030 0,40 to 1,50 0,20 0,20 to 0,65 V 0,05
N3C1M2 0,10 to 0,25 0,60 to 1,60 0,80 0,030 0,030 0,75 to 2,00 0,20 to 0,70 0,15 to 0,55 V 0,05
V 0,05
N3M1 0,15 0,50 to 1,75 0,80 0,030 0,030 1,00 to 2,00 0,15 0,35
Al 1,8
N3M2 0,15 0,75 to 2,25 0,80 0,030 0,030 1,25 to 2,60 0,15 0,25 to 0,65 V 0,05
N4M1 0,12 2,25 0,80 0,030 0,030 1,75 to 2,75 0,20 0,35 V 0,05
N4M2 0,15 2,25 0,80 0,030 0,030 1,75 to 2,75 0,20 0,20 to 0,65 V 0,05
N4M21 0,12 1,25 to 2,25 0,80 0,030 0,030 1,75 to 2,75 0,20 0,50 —
N4C1M2 0,15 1,20 to 2,25 0,80 0,030 0,030 1,75 to 2,60 0,20 to 0,60 0,20 to 0,65 V 0,03
N4C2M2 0,15 2,25 0,80 0,030 0,030 1,75 to 2,75 0,60 to 1,00 0,20 to 0,65 V 0,05
a
Single values shown in this table are maximum values.
b
Cu ≤ 0,3, Nb ≤ 0,05, V ≤ 0,05.
c
Consumables for which the chemical composition is not listed in this table shall be symbolized similarly and prefixed by the letter Z. The chemical composition ranges are not
specified, therefore it is possible that two electrodes with the same Z classification are not interchangeable.
d
Analysis for B is required to be reported if intentionally added or if it is known to be present at levels greater than 0,001 0 %.
e
The weld metal shall be analysed for the specific elements for which values are shown in this table. If the presence of other elements is indicated in the course of this work, the
amount of those elements shall be determined to ensure that their total (excluding iron) does not exceed 0,50 % (by mass).
f
Al ≤ 1,8 for self-shielded electrodes.
g
Consumables for which the chemical composition is not listed in this table shall be symbolized by the letter G. In order to meet the alloy requirements of G, the all-weld metal
shall contain at least one of the elements. Additional chemical-composition requirements may be agreed between purchaser and supplier. The chemical composition ranges are not
specified and therefore it is possible that two products with the a G classification are not interchangeable.
ISO 18276:2024(en)
Table 6 (continued)
V 0,05
N5M2 0,07 0,50 to 1,50 0,60 0,015 0,015 1,30 to 3,75 0,20 0,50
Cu 0,06
N6C1M4 0,12 2,25 0,80 0,030 0,030 2,50 to 3,50 1,00 0,40 to 1,00 V 0,05
g g g g g g g
G 1,75 min. 0,80 min. 0,030 0,030 0,50 min. 0,30 min. 0,20 min. V 0,10 min.
a
Single values shown in this table are maximum values.
b
Cu ≤ 0,3, Nb ≤ 0,05, V ≤ 0,05.
c
Consumables for which the chemical composition is not listed in this table shall be symbolized similarly and prefixed by the letter Z. The chemical composition ranges are not
specified, therefore it is possible that two electrodes with the same Z classification are not interchangeable.
d
Analysis for B is required to be reported if intentionally added or if it is known to be present at levels greater than 0,001 0 %.
e
The weld metal shall be analysed for the specific elements for which values are shown in this table. If the presence of other elements is indicated in the course of this work, the
amount of those elements shall be determined to ensure that their total (excluding iron) does not exceed 0,50 % (by mass).
f
Al ≤ 1,8 for self-shielded electrodes.
g
Consumables for which the chemical composition is not listed in this table shall be symbolized by the letter G. In order to meet the alloy requirements of G, the all-weld metal
shall contain at least one of the elements. Additional chemical-composition requirements may be agreed between purchaser and supplier. The chemical composition ranges are not
specified and therefore it is possible that two products with the a G classification are not interchangeable.
ISO 18276:2024(en)
5.5 Symbol for type of electrode core – Classification by yield strength and 47 J impact
energy – System A
The symbols in Table 7 indicate the different types of tubular cored electrode relative to their core
composition and slag characteristics. Manufacturers shall provide information on recommended polarity.
Table 7 — Symbol for type of electrode core –
Classification by yield strength and 47 J impact energy – System A
Symbol Characteristics
R Slow-freezing rutile slag
P Fast-freezing rutile slag
B Basic
M Metal powder
Z Other types
NOTE A description of the characteristics of each of the types
of core is given in Annex C.
5.6 Symbol for usability characteristics of the electrodes – Classification by tensile strength
and 27 J impact energy – System B
The symbols in Table 8 indicate the usability characteristics of the electrode.
Table 8 — Usability characteristics –
Classification by tensile strength and 27 J impact energy – System B
Usability Shielding Operating Transfer Type of Welding
Characteristics
a
designator gas polarity of droplet core position
Low spatter loss, flat to slightly convex
T1 Required DC (+) Spray type Rutile 0 or 1
bead and high deposition rates
Slightly convex bead, a thin slag with-
out completely covering the weld
Globular Lime-fluo-
T5 Required DC (+) 0 or 1 bead, good impact properties and hot
type ride
and cold crack resistance compared
with “T1”
Small
Not re- Not speci- High deposition rates and excellent
T7 DC (−) droplet to 0 or 1
quired fied resistance to hot cracking
spray type
Small
Not re- Not speci- Very good low-temperature impact
T8 DC (−) droplet or 0 or 1
quired fied properties
spray type
Not recommended on thicknesses
Not re- Not speci- greater than 19 mm without main-
T11 DC (−) Spray type 0 or 1
quired fied taining preheat and interpass tem-
perature control
Very fine
Core consisting of metal alloys and
T15 Required DC (+) droplet Metal 0 or 1
iron powder, and minimal slag cover
spray type
b
TG As agreed between purchaser and supplier
a
See Table 5B.
b
For electrodes that are not covered by any current usability designator.
NOTE A description of the usability characteristics of the electrodes is given in Annex D.
ISO 18276:2024(en)
5.7 Symbol for shielding gas
The symbols for shielding gases shall be in accordance with ISO 14175, except that the symbol NO shall be
used for non-gas shielded tubular cored electrodes.
5.8 Symbol for welding position
The symbols in Table 9 indicate the positions for which the electrode is suitable for classification to
ISO 18276-A (System A) or ISO 18276-B (System B).
a
Table 9 — Symbols for welding position
System A – System B –
Symbol Classification by yield strength and Classification by tensile strength and
47 J impact energy 27 J impact energy
0 — PA and PB
1 PA, PB, PC, PD, PE, PF and PG PA, PB, PC, PD, PE, PF or PG, or both
2 PA, PB, PC, PD, PE and PF —
3 PA and PB —
4 PA —
5 PA, PB and PG —
a
Welding positions given in the Key are in accordance with ISO 6947.
Key
PA flat position
PB horizontal vertical position
PC horizontal position
PD horizontal overhead position
PE overhead position
PF vertical up position
PG vertical down position
NOTE A dash indicates not applicable.
5.9 Symbol for hydrogen content of deposited metal
The symbols in Table 10 indicate the hydrogen content determined in accordance with the method given in
ISO 3690. Annex E gives additional information on hydrogen content.
Table 10 — Symbol for hydrogen content of deposited metal
Hydrogen content
max.
Symbol
in ml/100 g of deposited metal
H5 5
H10 10
H15 15
When the hydrogen symbol is included in the designation, the manufacturer shall state in its literature what
restrictions need to be placed on the conditions of storage and on current, arc voltage, electrode extension,
polarity and shielding gas to remain within this limit.
ISO 18276:2024(en)
5.10 Symbol for conditions of post-weld heat treatment
5.10.1 Classification by yield strength and 47 J impact energy – System A
The letter T indicates that strength, elongation and impact properties in the classification of the all-weld
metal fulfil the clas
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...