SIST EN ISO 18275:2018
(Main)Welding consumables - Covered electrodes for manual metal arc welding of high-strength steels - Classification (ISO 18275:2018)
Welding consumables - Covered electrodes for manual metal arc welding of high-strength steels - Classification (ISO 18275:2018)
This document specifies requirements for classification of covered electrodes and deposited metal
in the as-welded condition and in the post-weld heat-treated condition for manual metal arc welding
of high-strength steels with a minimum yield strength greater than 500 MPa or a minimum tensile
strength greater than 570 MPa.
This document is a combined specification providing a classification utilizing a system based on the
yield strength and an average impact energy of 47 J of the all-weld metal, or utilizing a system based on
the tensile strength and an average impact energy of 27 J of the all-weld metal.
a) Subclauses and tables which carry the suffix letter “A” are applicable only to covered electrodes
classified under the system based on the yield strength and an average impact energy of 47 J of the
all-weld metal given in this document.
b) Subclauses and tables which carry the suffix letter “B” are applicable only to covered electrodes
classified under the system based on the tensile strength and an average impact energy of 27 J of
the all-weld metal given in this document.
c) Subclauses and tables which do not have either the suffix letter “A” or the suffix letter “B” are
applicable to all covered electrodes classified under this document.
Schweißzusätze - Umhüllte Stabelektroden zum Lichtbogenhandschweißen von hochfesten Stählen - Einteilung (ISO 18275:2018)
Diese Internationale Norm legt die Anforderungen für die Einteilung von umhüllten Stabelektroden und dem aufgetragenen Schweißgut im Schweißzustand und im Zustand nach der Wärmenachbehandlung zum Licht¬bogenhandschweißen von hochfesten Stählen mit einer Mindeststreckgrenze von über 500 MPa oder einer Mindestzugfestigkeit von über 570 MPa fest.
Diese Internationale Norm enthält eine gemeinsame Spezifikation zur Einteilung mit Hilfe eines Systems, das auf der Streckgrenze und einer durchschnittlichen Kerbschlagarbeit von 47 J des reinen Schweißgutes basiert oder mit Hilfe eines Systems, das auf der Zugfestigkeit und einer durchschnittlichen Kerbschlagarbeit von 27 J des reinen Schweißgutes basiert.
a) Unterabschnitte und Tabellen, gekennzeichnet durch ein nachgestelltes „A“, können nur für umhüllte Stabelektroden angewendet werden, die nach der Streckgrenze und einer durchschnittlichen Kerbschlagarbeit von 47 J des reinen Schweißgutes nach dieser Internationalen Norm eingeteilt werden.
b) Unterabschnitte und Tabellen, gekennzeichnet durch ein nachgestelltes „B“, können nur für umhüllte Stabelektroden angewendet werden, die nach der Zugfestigkeit und einer durchschnittlichen Kerbschlagarbeit von 27 J des reinen Schweißgutes nach dieser Internationalen Norm eingeteilt werden.
c) Unterabschnitte und Tabellen, die kein nachgestelltes „A“ oder „B“ enthalten, sind für alle nach dieser Internationalen Norm eingeteilten umhüllten Stabelektroden anwendbar.
Produits consommables pour le soudage - Électrodes enrobées pour le soudage manuel à l'arc des aciers à haute résistance - Classification (ISO 18275:2018)
Le présent document spécifie les exigences relatives à la classification des électrodes enrobées et du métal déposé à l'état brut de soudage ou traité thermiquement après soudage, en soudage manuel à l'arc 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.
Le présent document fournit une spécification mixte permettant une classification utilisant un système basé soit sur la limite d'élasticité et une énergie de rupture moyenne de 47 J pour le métal fondu hors dilution, soit sur la résistance à la traction et une énergie de rupture moyenne de 27 J pour le métal fondu hors dilution.
a) Les paragraphes et les tableaux qui portent le suffixe «A» sont applicables uniquement aux électrodes enrobées classifiées d'après le système basé sur la limite d'élasticité et une énergie de rupture moyenne de 47 J pour le métal fondu hors dilution donné dans le présent document.
b) Les paragraphes et les tableaux qui portent le suffixe «B» sont applicables uniquement aux électrodes enrobées classifiées d'après le système basé sur la résistance à la traction et une énergie de rupture moyenne de 27 J pour le métal fondu hors dilution donné dans le présent document.
c) Les paragraphes et les tableaux qui ne portent ni le suffixe «A» ni le suffixe «B» sont applicables à toutes les électrodes enrobées classifiées selon le présent document.
Dodajni materiali za varjenje - Oplaščene elektrode za ročno obločno varjenje visokotrdnostnih jekel - Razvrstitev (ISO 18275:2018)
Ta dokument določa zahteve za razvrstitev oplaščenih elektrod ter pretaljene kovine v varjenem stanju in stanju po varjenju s toplotno obdelavo za obločno varjenje visokotrdnih jekel z minimalno mejo prožnosti, večjo od 500 MPa, ali minimalno natezno trdnostjo, večjo od 570 MPa.
Ta dokument 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.
a) Podtočke in preglednice z dodano črko »A« se uporabljajo samo za oplaščene elektrode, ki so razvrščene po sistemu, ki temelji na meji prožnosti in povprečni energiji udarca 47 J za čiste vare, navedene v tem dokumentu.
b) Podtočke in preglednice z dodano črko »B« se uporabljajo samo za oplaščene elektrode, ki so razvrščene po sistemu, ki temelji na natezni trdnosti in povprečni energiji udarca 27 J za čiste vare, navedene v tem dokumentu.
c) Podtočke in preglednice brez dodane črke »A« ali »B« se uporabljajo za vse elektrode, ki so razvrščene v skladu s tem dokumentom.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 18275:2018
01-november-2018
1DGRPHãþD
SIST EN ISO 18275:2012
'RGDMQLPDWHULDOL]DYDUMHQMH2SODãþHQHHOHNWURGH]DURþQRREORþQRYDUMHQMH
YLVRNRWUGQRVWQLKMHNHO5D]YUVWLWHY ,62
Welding consumables - Covered electrodes for manual metal arc welding of high-
strength steels - Classification (ISO 18275:2018)
Schweißzusätze - Umhüllte Stabelektroden zum Lichtbogenhandschweißen von
hochfesten Stählen - Einteilung (ISO 18275:2018)
Produits consommables pour le soudage - Électrodes enrobées pour le soudage manuel
à l'arc des aciers à haute résistance - Classification (ISO 18275:2018)
Ta slovenski standard je istoveten z: EN ISO 18275:2018
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
SIST EN ISO 18275:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 18275:2018
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SIST EN ISO 18275:2018
EN ISO 18275
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2018
EUROPÄISCHE NORM
ICS 25.160.20 Supersedes EN ISO 18275:2012
English Version
Welding consumables - Covered electrodes for manual
metal arc welding of high-strength steels - Classification
(ISO 18275:2018)
Produits consommables pour le soudage - Électrodes Schweißzusätze - Umhüllte Stabelektroden zum
enrobées pour le soudage manuel à l'arc des aciers à Lichtbogenhandschweißen von hochfesten Stählen -
haute résistance - Classification (ISO 18275:2018) Einteilung (ISO 18275:2018)
This European Standard was approved by CEN on 20 September 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 18275:2018 E
worldwide for CEN national Members.
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SIST EN ISO 18275:2018
EN ISO 18275:2018 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 18275:2018
EN ISO 18275:2018 (E)
European foreword
This document (EN ISO 18275:2018) 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 March 2019, and conflicting national standards shall
be withdrawn at the latest by March 2019.
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 18275:2012.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
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 18275:2018 has been approved by CEN as EN ISO 18275:2018 without any modification.
3
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SIST EN ISO 18275:2018
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SIST EN ISO 18275:2018
INTERNATIONAL ISO
STANDARD 18275
Third edition
2018-08
Welding consumables — Covered
electrodes for manual metal arc
welding of high-strength steels —
Classification
Produits consommables pour le soudage — Électrodes enrobées
pour le soudage manuel à l'arc des aciers à haute résistance —
Classification
Reference number
ISO 18275:2018(E)
©
ISO 2018
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SIST EN ISO 18275:2018
ISO 18275:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
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
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
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SIST EN ISO 18275:2018
ISO 18275:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
4.1 General . 2
4.2 Compulsory and optional sections . 3
5 Symbols and requirements . 3
5.1 Symbol for the product/process . 3
5.2 Symbol for tensile properties of all-weld metal . 3
5.3 Symbol for impact properties of all-weld metal . 4
5.4 Symbol for chemical composition of all-weld metal. 5
5.5 Symbol for type of electrode covering . 7
5.6 Symbol for condition of post-weld heat treatment of all-weld metal . 8
5.7 Symbol for electrode efficiency and type of current . 9
5.8 Symbol for welding position . 9
5.9 Symbol for diffusible hydrogen content of deposited metal . .10
5.10 Mechanical property and composition requirements .10
6 Mechanical property tests .16
6.1 General .16
6.2 Preheating and interpass temperatures .16
6.3 Pass sequence .16
7 Chemical analysis .16
8 Rounding procedure .17
9 Retests .17
10 Technical delivery conditions .17
11 Examples of designation .17
Annex A (informative) Classification systems .20
Annex B (informative) Description of types of electrode covering — Classification by yield
strength and 47 J impact energy .23
Annex C (informative) Description of types of electrode covering — Classification by tensile
strength and 27 J impact energy .24
Annex D (informative) Notes on diffusible hydrogen .26
Annex E (informative) Description of chemical composition symbols — Classification by
yield strength and 47 J impact energy .27
Annex F (informative) Description of chemical composition symbols — Classification by
tensile strength and 27 J impact energy .28
Bibliography .29
© ISO 2018 – All rights reserved iii
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SIST EN ISO 18275:2018
ISO 18275:2018(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 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.
Any feedback, question or request for official interpretation related to 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/members .html. Official interpretations, where they
exist, are available from this page: https: //committee .iso .org/sites/tc44/home/interpretation .html.
This third edition cancels and replaces the second edition (ISO 18275:2011), which has been technically
revised. The main changes compared to the previous edition are as follows:
— fillet weld testing has been removed from the document;
— requirements for diffusible hydrogen removal treatment have been revised;
— new classifications have been added: NiCrCu, E6218-N4M2 P;
— post-weld heat treatment details have been clarified on the B-side;
— Clauses 7, 8 and 9 have been updated to reflect agreed text for all ISO/TC 44/SC 3 standards.
iv © ISO 2018 – All rights reserved
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SIST EN ISO 18275:2018
ISO 18275:2018(E)
Introduction
This document recognizes that there are two somewhat different approaches in the global market to
classifying a given electrode, 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 757:1997. The classification in accordance with system B is mainly based on
standards used around the Pacific Rim.
This document provides a classification system for covered electrodes for high-strength steels in terms
of the tensile properties, impact properties and chemical composition of the all-weld metal, as well as
the type of electrode covering. The ratio of yield strength 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 does not necessarily ensure that the weld metal tensile strength matches that of
the parent metal. Therefore, where the application requires matching tensile strength, selection of the
consumable should be made by reference to column 3 of Table 1A or column 2 of Table 8B.
It should be noted that the mechanical properties of all-weld metal test specimens used to classify
covered electrodes can vary from those obtained in production joints because of differences in welding
procedure such as electrode size, width of weave, welding position, and parent metal composition.
© ISO 2018 – All rights reserved v
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SIST EN ISO 18275:2018
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SIST EN ISO 18275:2018
INTERNATIONAL STANDARD ISO 18275:2018(E)
Welding consumables — Covered electrodes for manual
metal arc welding of high-strength steels — Classification
1 Scope
This document specifies requirements for classification of covered electrodes and deposited metal
in the as-welded condition and in the post-weld heat-treated condition for manual metal arc welding
of high-strength steels with a minimum yield strength greater than 500 MPa or a minimum tensile
strength greater than 570 MPa.
This document is a combined specification providing a classification utilizing a system based on the
yield strength and an average impact energy of 47 J of the all-weld metal, or utilizing a system based on
the tensile strength and an average impact energy of 27 J of the all-weld metal.
a) Subclauses and tables which carry the suffix letter “A” are applicable only to covered electrodes
classified under the system based on the yield strength and an average impact energy of 47 J of the
all-weld metal given in this document.
b) Subclauses and tables which carry the suffix letter “B” are applicable only to covered electrodes
classified under the system based on the tensile strength and an average impact energy of 27 J of
the all-weld metal given in this document.
c) Subclauses and tables which do not have either the suffix letter “A” or the suffix letter “B” are
applicable to all covered electrodes classified under this document.
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 2401, Covered electrodes — Determination of the efficiency, metal recovery and deposition coefficient
ISO 2560:2009, Welding consumables — Covered electrodes for manual metal arc welding of non-alloy and
fine grain steels — Classification
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 14344, Welding consumables — Procurement of filler materials and fluxes
ISO 15792-1, Welding consumables — Test methods — Part 1: Test methods for all-weld metal test
specimens in steel, nickel and nickel alloys
ISO 80000-1:2009, Quantities and units — Part 1: General
3 Terms and definitions
No terms and definitions are listed in this document.
© ISO 2018 – All rights reserved 1
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SIST EN ISO 18275:2018
ISO 18275:2018(E)
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at https: //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. 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
in both systems. Then either or both classification designations can be used for the product.
The classification is based on an electrode diameter of 4,0 mm.
Classification is as follows:
4.1A Classification by yield strength and 4.1B Classification by tensile strength and
47 J impact energy 27 J impact energy
The classification is divided into nine parts: The classification is divided into seven 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 the 2) the second part gives a symbol indicating the
strength and elongation of the all-weld metal strength of the all-weld metal (see Table 1B);
(see Table 1A);
3) the third part gives a symbol indicating
3) the third part gives a symbol indicating the the type of electrode covering, the type
impact properties of the all-weld metal (see of current, and the welding position (see
Table 2A); Table 4B);
4) the fourth part gives a symbol indicating the 4) the fourth part gives a symbol indicating the
chemical composition of the all-weld metal chemical composition of the all-weld metal
(see Table 3A); (see Table 3B);
5) the fifth part gives a symbol indicating the 5) the fifth part gives a symbol indicating the
type of electrode covering (see 5.5A); condition of the post-weld heat treatment
under which the all-weld metal test was
6) the sixth part gives a symbol indicating
conducted (see 5.6B);
post-weld heat treatment if this is applied
(see 5.6A); 6) the sixth part gives a symbol indicating that
the electrode has satisfied a requirement
7) the seventh part gives a symbol indicating
for 47 J impact energy at the temperature
the nominal electrode efficiency and type of
normally used for the 27 J requirement;
current (see Table 5A);
7) the seventh part gives a symbol indicating
8) the eighth part gives a symbol indicating the
the diffusible hydrogen content of the
welding position (see Table 6A);
deposited metal (see Table 7).
9) the ninth part gives a symbol indicating the
diffusible hydrogen content of the deposited
metal (see Table 7).
In both systems, the electrode classification shall include all compulsory sections and may include
optional sections as outlined in 4.2A and 4.2B.
2 © ISO 2018 – All rights reserved
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SIST EN ISO 18275:2018
ISO 18275:2018(E)
4.2 Compulsory and optional sections
4.2A Classification by yield strength and 4.2B Classification by tensile strength and
47 J impact energy 27 J impact energy
a) Compulsory section a) Compulsory section
This section includes the symbols for the type of This section includes the symbols for the type
product, the strength and elongation, the impact of product, the strength, the type of covering
properties, the chemical composition and the (which includes the type of current and the
type of covering, i.e. the symbols defined in 5.1, welding position), the chemical composition and
5.2A, 5.3A, 5.4A and 5.5A. the condition of heat treatment, i.e. the symbols
defined in 5.1, 5.2B, 5.4B, 5.5B and 5.6B.
b) Optional section b) Optional section
This section includes the symbols for post-weld This section includes the symbol for the optional
heat treatment, the weld metal recovery, the supplemental designator for 47 J impact energy,
type of current, the welding positions for which i.e. the symbol defined in 5.3B, and the symbol
the electrode is suitable, and the symbol for for the diffusible hydrogen content, i.e. the sym-
diffusible hydrogen content, i.e. the symbols bol defined in 5.9.
defined in 5.6A, 5.7A, 5.8A and 5.9.
The designation (see Clause 11) shall be used on packages and in the manufacturer's literature and
data sheets. Figure A.1 gives a schematic representation of the designation of electrodes classified by
yield strength and 47 J impact energy (system A). Figure A.2 gives a schematic representation of the
designation of electrodes classified by tensile strength and 27 J impact energy (system B).
5 Symbols and requirements
5.1 Symbol for the product/process
The symbol for the covered electrode used in the manual metal arc process shall be the letter E.
5.2 Symbol for tensile properties of all-weld metal
5.2A Classification by yield strength and 47 J 5.2B Classification by tensile strength and
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 of the all-weld metal in the as-welded
all-weld metal in the as-welded condition or, if condition, in the post-weld heat-treated condi-
a T is added to the designation, after post-weld tion, or in both conditions, determined in ac-
heat treatment as described in 5.6, determined cordance with Clause 6. The yield strength and
in accordance with Clause 6. elongation requirements depend on the specific
chemical composition, heat treatment condi-
tion and covering type, as well as on the tensile
strength requirements, as given for the complete
classification in Table 8B.
NOTE Post-weld heat treatment (sometimes referred to as stress relief heat treatment) can alter the
mechanical properties of the weld from those obtained in the as-welded condition.
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SIST EN ISO 18275:2018
ISO 18275:2018(E)
Table 1A — Symbol for tensile properties Table 1B — Symbol for tensile strength
of all-weld metal of all-weld metal
(Classification by yield strength (Classification by tensile strength
and 47 J impact energy) and 27 J impact energy)
Minimum tensile
Minimum Tensile Minimum
strength
b
yield strength elongation
Symbol Symbol
a
strength
MPa MPa %
MPa
55 550 610 to 780 18 59 590
62 620 690 to 890 18 62 620
69 690 760 to 960 17 69 690
79 790 880 to 1 080 16 76 760
89 890 980 to 1 180 15 78 780
83 830
a
For yield strength, the lower yield strength
(R ) shall be used when yielding occurs, otherwise
eL
the 0,2 % proof strength (R ) shall be used.
p0,2
b
The gauge length is equal to five times the test
specimen diameter.
5.3 Symbol for impact properties of all-weld metal
5.3A Classification by yield strength and 47 J 5.3B Classification by tensile strength and
impact energy 27 J impact energy
The symbols in Table 2A indicate the tempera- There is no specific symbol for impact proper-
ture at which an average impact energy of 47 J is ties. The complete classification in Table 8B
achieved under the conditions given in Clause 6. determines the temperature at which an impact
Three test specimens shall be tested. Only one energy of 27 J is achieved in the as-welded condi-
individual value may be lower than 47 J, but it tion or in the post-weld heat-treated condition
shall not be lower than 32 J. When an all-weld under the conditions given in Clause 6. Five test
metal has been classified for a certain tempera- specimens shall be tested. The lowest and highest
ture, this automatically covers any higher tem- values obtained shall be disregarded. Two of the
perature in Table 2A. three remaining values shall be greater than 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, imme-
diately 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 requirements of 5.3A.
4 © ISO 2018 – All rights res
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