EN ISO 18275:2012

SLOVENSKI STANDARD
01-september-2012
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SIST EN 757:1999
'RGDMQLPDWHULDOL]DYDUMHQMH2SODãþHQHHOHNWURGH]DURþQRREORþQRYDUMHQMH
YLVRNRWUGQLKMHNHO5D]YUVWLWHY,62
Welding consumables - Covered electrodes for manual metal arc welding of high-
strength steels - Classification (ISO 18275:2011)
Schweißzusätze - Umhüllte Stabelektroden zum Lichtbogenhandschweißen von
hochfesten Stählen - Einteilung (ISO 18275:2011)
Produits consommables pour le soudage - Électrodes enrobées pour le soudage manuel
à l'arc des aciers à haute résistance - Classification (ISO 18275:2011)
Ta slovenski standard je istoveten z: EN ISO 18275:2012
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 18275
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2012
ICS 25.160.20 Supersedes EN 757:1997
English Version
Welding consumables - Covered electrodes for manual metal
arc welding of high-strength steels - Classification (ISO
18275:2011)
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 18275:2011) Einteilung (ISO 18275:2011)
This European Standard was approved by CEN on 21 April 2012.

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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18275:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
The text of ISO 18275:2011 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
18275:2012 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 November 2012, and conflicting national standards shall be withdrawn
at the latest by November 2012.
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 757:1997.
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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 18275:2011 has been approved by CEN as a EN ISO 18275:2012 without any modification.

INTERNATIONAL ISO
STANDARD 18275
Second edition
2011-05-01
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 18275:2011(E)
©
ISO 2011
ISO 18275:2011(E)
©  ISO 2011
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved

ISO 18275:2011(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Classification .2
4 Symbols and requirements .3
4.1 Symbol for the product/process .3
4.2 Symbol for tensile properties of all-weld metal .3
4.3 Symbol for impact properties of all-weld metal .4
4.4 Symbol for chemical composition of all-weld metal.5
4.5 Symbol for type of electrode covering.7
4.6 Symbol for condition of post-weld heat treatment of all-weld metal .7
4.7 Symbol for nominal electrode efficiency and type of current .8
4.8 Symbol for welding position .9
4.9 Symbol for diffusible hydrogen content of deposited metal .9
4.10 Mechanical property and composition requirements.9
5 Mechanical property tests .15
5.1 General .15
5.2 Preheating and interpass temperatures.15
5.3 Pass sequence.15
6 Chemical analysis .15
7 Fillet weld test.16
8 Rounding procedure .17
9 Retests.17
10 Technical delivery conditions .18
11 Examples of designation .18
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 18275:2011(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.
ISO 18275 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 3, Welding consumables.
This second edition cancels and replaces the first edition (ISO 18275:2005), of which it constitutes a technical
revision. It also incorporates Technical Corrigendum ISO 18275:2005/Cor.1:2007.
Requests for official interpretations of any aspect of this International Standard should be directed to the
Secretariat of ISO/TC 44/SC 3 via your national standards body. A complete listing of these bodies can be
found at www.iso.org.
iv © ISO 2011 – All rights reserved

ISO 18275:2011(E)
Introduction
This International Standard 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 International Standard. The classification in accordance with system A is
[1]
mainly based on EN 757:1997 . The classification in accordance with system B is mainly based upon
standards used around the Pacific Rim.
This International Standard 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.
INTERNATIONAL STANDARD ISO 18275:2011(E)

Welding consumables — Covered electrodes for manual metal
arc welding of high-strength steels — Classification
1 Scope
This International Standard 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 International Standard is a combined specification providing a 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.
a) Subclauses and tables which carry the suffix letter “A” are applicable only to covered 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 International Standard.
b) Subclauses and tables which carry the suffix letter “B” are applicable only to covered 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 International Standard.
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 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 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
1)
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 6947:2011, Welding and allied processes — Welding positions
ISO 14344, Welding consumables — Procurement of filler materials and fluxes

1) To be published. (Revision of ISO 3690:2000)
ISO 18275:2011(E)
ISO 15792-1:2000+Amd.1:—, Welding consumables — Test methods — Part 1: Test methods for all-weld
metal test specimens in steel, nickel and nickel alloys
ISO 15792-3, Welding consumables — Test methods — Part 3: Classification testing of positional capacity
2)
and root penetration of welding consumables in a fillet weld
ISO 80000-1:2009, Quantities and units — Part 1: General
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. 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, with the exception of the symbol for welding
position, which is based on ISO 15792-3.
3.1A Classification by yield strength and 3.1B Classification by tensile strength
47 J impact energy and 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 the type
3) the third part gives a symbol indicating the of electrode covering, the type of current, and
impact properties of the all-weld metal (see the welding position (see Table 4B);
Table 2A);
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 (see
chemical composition of the all-weld metal (see Table 3B);
Table 3A);
5) the fifth part gives a symbol indicating the
5) the fifth part gives a symbol indicating the type condition of the post-weld heat treatment under
of electrode covering (see 4.5A); which the all-weld metal test was conducted
(see 4.6B);
6) the sixth part gives a symbol indicating post-
weld heat treatment if this is applied (see 4.6A); 6) the sixth part gives a symbol indicating that the
electrode has satisfied a requirement for 47 J
impact energy at the temperature normally
7) the seventh part gives a symbol indicating the
nominal electrode efficiency and type of current used for the 27 J requirement;
(see Table 5A);
7) the seventh part gives a symbol indicating the
8) the eighth part gives a symbol indicating the diffusible hydrogen content of the deposited
metal (see Table 7).
welding position (see Table 6A);
9) the ninth part gives a symbol indicating the
diffusible hydrogen content of the deposited
metal (see Table 7).
2) To be published. (Revision of ISO 15792-3:2000)
2 © ISO 2011 – All rights reserved

ISO 18275:2011(E)
In both systems, the electrode classification shall include all compulsory sections and may include optional
sections as outlined in 3.2A and 3.2B.
3.2 Compulsory and optional sections

3.2A Classification by yield strength and 3.2B Classification by tensile strength

47 J impact energy and 27 J impact energy
a) Compulsory section a) Compulsory section
This section includes the symbols for the type This section includes the symbols for the type
of product, the strength and elongation, the of product, the strength, the type of covering
impact properties, the chemical composition (which includes the type of current and the
and the type of covering, i.e. the symbols welding position), the chemical composition and
defined in 4.1, 4.2A, 4.3A, 4.4A and 4.5A. the condition of heat treatment, i.e. the symbols
defined in 4.1, 4.2B, 4.4B, 4.5B and 4.6B.
b) Optional section
b) Optional section
This section includes the symbols for post-weld This section includes the symbol for the
optional supplemental designator for 47 J
heat treatment, the weld metal recovery, the
type of current, the welding positions for which impact energy, i.e. the symbol defined in 4.3B,
and the symbol for the diffusible hydrogen
the electrode is suitable, and the symbol for
diffusible hydrogen content, i.e. the symbols content, i.e. the symbol defined in 4.9.
defined in 4.6A, 4.7A, 4.8A and 4.9.
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).
4 Symbols and requirements
4.1 Symbol for the product/process
The symbol for the covered electrode used in the manual metal arc process shall be the letter E.
4.2 Symbol for tensile properties of all-weld metal
4.2A Classification by yield strength and 4.2B Classification by tensile strength
47 J impact energy and 27 J impact energy
The symbols in Table 1A indicate the yield strength, The symbols in Table 1B indicate the tensile
tensile strength and elongation of the all-weld metal strength of the all-weld metal in the as-welded
in the as-welded condition or, if a T is added to the condition, in the post-weld heat-treated condition, or
designation, after post-weld heat treatment as in both conditions, determined in accordance with
described in 4.6, determined in accordance with Clause 5. The yield strength and elongation
Clause 5. requirements depend upon the specific chemical
composition, heat treatment condition and covering
type, as well as upon 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.
ISO 18275:2011(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 Minimum tensile strength
b
yield
strength elongation
Symbol Symbol
a
strength
MPa MPa % MPa
59 590
55 550 610 to 780 18
62 620
62 620 690 to 890 18
69 690
69 690 760 to 960 17
76 760
79 790 880 to 1 080 16
78 780
89 890 980 to 1 180 15
83 830
a
For yield strength, the lower yield strength (R ) shall be
eL
used when yielding occurs, otherwise the 0,2 % proof strength
(R ) shall be used.
p0,2
b
The gauge length is equal to five times the test specimen
diameter.
4.3 Symbol for impact properties of all-weld metal
4.3A Classification by yield strength and 4.3B Classification by tensile strength
47 J impact energy and 27 J impact energy
The symbols in Table 2A indicate the temperature at There is no specific symbol for impact properties.
which an average impact energy of 47 J is achieved The complete classification in Table 8B determines
under the conditions given in Clause 5. Three test the temperature at which an impact energy of 27 J
specimens shall be tested. Only one individual value is achieved in the as-welded condition or in the
may be lower than 47 J, but it shall not be lower post-weld heat-treated condition under the
than 32 J. When an all-weld metal has been conditions given in Clause 5. Five test specimens
classified for a certain temperature, this shall be tested. The lowest and highest values
automatically covers any higher temperature in obtained shall be disregarded. Two of the three
Table 2A. remaining values shall be greater than the specified
27 J level, one of the three may be lower but shall
Table 2A — Symbol for impact properties
not be less than 20 J. The average of the three
of all-weld metal
remaining values shall be at least 27 J.
(Classification by yield strength
and 47 J impact energy)
The addition of the optional symbol U, immediately
after the symbol for condition of heat treatment,
Temperature for minimum average

indicates that the supplemental requirement of 47 J
Symbol impact energy 47 J
impact energy at the normal 27 J impact test
ºC
temperature has also been satisfied. For the 47 J

Z No requirements
impact requirement, the number of specimens
tested and values obtained shall meet the
A +20
requirements of 4.3A.
2 −20
−30
4 −40
−50
6 −60
−70
8 −80
4 © ISO 2011 – All rights reserved

ISO 18275:2011(E)
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.
4.4 Symbol for chemical composition of all-weld metal
4.4A Classification by yield strength and 4.4B Classification by tensile strength
47 J impact energy and 27 J impact energy
The symbols in Table 3A indicate the chemical The symbols in Table 3B indicate the principal
composition of the all-weld metal, determined in alloying elements, and sometimes the nominal alloy
accordance with Clause 6. level of the most significant alloy element, of the all-
weld metal, determined in accordance with
Clause 6. The symbol for chemical composition
does not immediately follow the symbol for strength,
but follows the symbol for covering type. The
complete compulsory classification designation,
given in 4.10B, determines the exact chemical
composition requirements for a particular electrode
classification.
Table 3A — Symbol for chemical composition Table 3B — Symbol for chemical composition
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)

ab
Chemical composition
Chemical composition
% (by mass)
Alloy symbol Alloy symbol
Principal alloy Nominal level
Mn Ni Cr Mo
element(s) % (by mass)
MnMo 1,4 to 2,0 — — 0,3 to 0,6 Mn 1,5
3 M2
Mn1Ni 1,4 to 2,0 0,6 to 1,2 — — Mo 0,4
1NiMo 1,4 0,6 to 1,2 — 0,3 to 0,6 Mn 2,0
4 M2
1,5NiMo 1,4 1,2 to 1,8 — 0,3 to 0,6 Mo 0,4
2NiMo 1,4 1,8 to 2,6 — 0,3 to 0,6 Mn 1,5
3 M3
Mn1NiMo 1,4 to 2,0 0,6 to 1,2 — 0,3 to 0,6 Mo 0,5
Mn2NiMo 1,4 to 2,0 1,8 to 2,6 — 0,3 to 0,6 Ni 0,5
N1M1
Mn2NiCrMo 1,4 to 2,0 1,8 to 2,6 0,3 to 0,6 0,3 to 0,6 Mo 0,2
Mn2Ni1CrMo 1,4 to 2,0 1,8 to 2,6 0,6 to 1,0 0,3 to 0,6 Ni 1,0
N2M1
c
Any other agreed composition Mo 0,2
Z
a
If not specified, Mo < 0,2; Ni < 0,3; Cr < 0,2; V < 0,05;
Ni 1,5
Nb < 0,05; Cu < 0,3; 0,03 u C u 0,10; P < 0,025; S < 0,020; N3M1
Mo 0,2
Si < 0,80.
b
Single values are maxima. Ni 1,5
N3M2
c
Consumables for which the chemical composition is not
Mo 0,4
listed shall be symbolized similarly and prefixed by the letter Z.
The chemical composition ranges are not specified and it is

possible that two electrodes with the same Z classification are

not interchangeable.
ISO 18275:2011(E)
Table 3B (continued)
Chemical composition
Alloy symbol
Principal alloy Nominal level
element(s) % (by mass)
Ni 2,0
N4M1
Mo 0,2
Ni 2,0
N4M2
Mo 0,4
Ni 2,0
N4M3
Mo 0,5
Ni 2,5
N5M1
Mo 0,2
Ni 2,5
N5M4
Mo 0,6
Ni 4,5
N9M3
Mo 0,5
N13L Ni 6,5
Ni 1,5
N3CM1
Cr 0,2
Mo 0,2
Ni 1,8
N4CM2
Cr 0,3
Mo 0,4
Ni 2,0
N4C2M1 Cr 0,7
Mo 0,3
Ni 2,0
N4C2M2 Cr 1,0
Mo 0,4
Ni 2,5
N5CM3
Cr 0,3
Mo 0,5
Ni 3,5
N7CM3
Cr 0,3
Mo 0,5
Mn 1,2
P1 Ni 1,0
Mo 0,5
Mn 1,3
P2 Ni 1,0
Mo 0,5
a
G Any other agreed composition
a
Consumables for which the chemical composition is not
listed shall be symbolized similarly and prefixed by the letter G.
The chemical composition ranges are not specified and it is
possible that two electrodes with the same G classification are
not interchangeable.
6 © ISO 2011 – All rights reserved

ISO 18275:2011(E)
4.5 Symbol for type of electrode covering
4.5A Classification by yield strength and 4.5B Classification by tensile strength
47 J impact energy and 27 J impact energy
Most electrodes of this type have a basic covering The type of covering of a covered electrode
and the symbol for this shall be B. depends substantially on the types of slag-forming
component. The type of covering also determines
the positions suitable for welding and the type of
For cellulosic and other electrode coverings, consult
ISO 2560:2009, 4.5A. current, in accordance with Table 4B.
NOTE A description of the characteristics of each of

the types of covering is given in Annex B.
Table 4B — Symbol for type of covering

(Classification by tensile strength
and 27 J impact energy)
Type of Welding
b
Symbol Type of current
a
covering positions
10 Cellulosic All
d.c. (+)
11 Cellulosic All a.c. or d.c. (+)

c
13 Rutile
All a.c. or d.c. (+)
c
15 Basic
All d.c. (+)
c
16 Basic
a.c. or d.c. (+)
All
c
Basic + iron a.c. or d.c. (+)
All
powder
d
45 Basic d.c. (+)
All
NOTE A description of the characteristics of each of the
types of covering is given in Annex C.
a
Positions are defined in ISO 6947.
b
Alternating current = a.c.; direct current = d.c.; electrode
positive = (+); electrode positive or electrode negative = (±).
c
The indication “all positions” may or may not include
vertical down welding. This shall be specified in the
manufacturer's trade literature.
d
Excluding vertical up welding.

4.6 Symbol for condition of post-weld heat treatment of all-weld metal
4.6A Classification by yield strength and 4.6B Classification by tensile strength

47 J impact energy and 27 J impact energy
The letter T indicates that strength, elongation and If the electrode has been classified in the as-welded
impact properties in the classification of the condition, the symbol A shall be added to the
deposited metal are obtained after a post-weld heat classification. If the electrode has been classified in
treatment between 560 °C and 600 °C for 1 h. The the post-weld heat-treated condition, the
test piece shall be left in the furnace to cool down to temperature of the post-weld heat treatment shall be
300 °C. 620 °C ± 15 °C, or 580 °C ± 15 °C in the case of
chemical composition N13L, and the symbol P shall
be added to the classification. If the electrode has
been classified in both conditions, the symbol AP
shall be added to the classification. See Table 9B
for the use of A and P in specific classifications.
ISO 18275:2011(E)
The furnace shall be at a temperature not higher
than 300 °C when the test assembly is placed in it.
The heating rate, from that point to the specified
holding temperature, shall not exceed 300 °C/h.
When the holding time has been completed, the
assembly shall be allowed to cool in the furnace to a
temperature below 300 °C at a rate not exceeding
200 °C/h. The assembly may be removed from the
furnace at any temperature below 300 °C, and
allowed to cool in still air to room temperature.

4.7 Symbol for nominal electrode efficiency and type of current
4.7A Classification by yield strength and 4.7B Classification by tensile strength
47 J impact energy and 27 J impact energy
The symbols in Table 5A indicate the nominal There is no specific symbol for nominal electrode
electrode efficiency, determined in accordance with efficiency and type of current. Type of current is
ISO 2401 with the type of current shown in included in the symbol for type of covering
Table 5A. (Table 4B). Nominal electrode efficiency is not
addressed.
Table 5A — Symbol for nominal electrode
efficiency and type of current
(Classification by yield strength
and 47 J impact energy)
Nominal electrode
a
Symbol
efficiency Type of current
%
1 u105
a.c. + d.c.
2 d.c.
u105
3 > 105 u 125 a.c. + d.c.
d.c.
> 105 u 125
> 125 u 160 a.c. + d.c.
6 d.c.
> 125 u 160
7 >160 a.c. + d.c.
>160 d.c.
a
In order to demonstrate operability on a.c., tests shall be
carried out with no load voltage higher than 65 V.

8 © ISO 2011 – All rights reserved

ISO 18275:2011(E)
4.8 Symbol for welding position
4.8A Classification by yield strength 4.8B Classification by tensile strength
and 47 J impact energy and 27 J impact energy
The symbols in Table 6A for welding positions There is no specific symbol for welding position. The
indicate the positions for which the electrode is welding position requirements are included with the
tested in accordance with ISO 15792-3. symbol for type of covering (Table 4B).

Table 6A — Symbol for welding position
(Classification by yield strength
and 47 J impact energy)
Welding positions in accordance
Symbol
with ISO 6947:2011
1 PA, PB, PC, PD, PE, PF, PG
2 PA, PB, PC, PD, PE, PF
3 PA, PB
4 PA
5 PA, PB, PG
4.9 Symbol for diffusible hydrogen content of deposited metal
The symbols in Table 7 indicate the diffusible hydrogen content determined in the metal deposited from an
electrode of size 4,0 mm in accordance with the method given in ISO 3690. The current used shall be 70 % to
90 % of the maximum value recommended by the manufacturer. Electrodes recommended for use with a.c.
shall be tested using a.c. Electrodes recommended for d.c. only shall be tested using d.c. with the electrode
positive [d.c.(+)].
The manufacturer shall provide information on the recommended type of current and drying conditions for
achieving the diffusible hydrogen levels.
Table 7 — Symbol for diffusible hydrogen content of deposited metal
Diffusible hydrogen content
Symbol max.
ml/100 g of deposited weld metal
H5 5
H10 10
H15 15
See Annex D for additional information about diffusible hydrogen.
4.10 Mechanical property and composition requirements
4.10A Classification by yield strength 4.10B Classification by tensile strength
and 47 J impact energy and 27 J impact energy
The mechanical property and chemical composition The mechanical property and chemical composition
requirements are determined from the symbols with requirements are only determined from the complete
reference to Tables 1A, 2A and 3A. No additional compulsory section of the electrode designation.
information is required. Mechanical property requirements are specified in
Table 8B. Chemical composition requirements are
specified in Table 9B.
ISO 18275:2011(E)
Table 8B — Mechanical property requirements
(Classification by tensile strength and 27 J impact energy)
ab
Tensile Yield strength Minimum Temperature of
a c
Classification, strength elongation Charpy V notch
a
compulsory section  determination

%
MPa MPa °C
E5916-3 M2 A and/or P 590 490 16 −20
E5916-N1M1 A and/or P 590 490 16 −20
E5916-N5M1 A and/or P 590 490 16 −60
E5918-N1M1 A and/or P 590 490 16 −20
E6210-G A and/or P 620 530 15 —
E6210-P1 A 620 530 15 −30
E6211-G A and/or P 620 530 15 —
E6213-G A and/or P 620 530 12 —
E6215-G A and/or P 620 530 15 —
E6216-G A and/or P 620 530 15 —
E6218-G A and/or P 620 530 15 —
E6215-N13L P 620 530 15 −115
E6215-3 M2 P 620 530 15 −50
E6216-3 M2 A and/or P 620 530 15 −20
E6216-N1M1 A and/or P 620 530 15 −20
E6216-N2M1 A and/or P 620 530 15 −20
E6216-N4M1 A and/or P 620 530 15 −40
E6216-N5M1 A and/or P 620 530 15 −60
E6218-3 M2 P 620 530 15 −50
E6218-3 M3 P 620 530 15 −50
E6218-N1M1 A and/or P 620 530 15 −20
E6218-N2M1 A and/or P 620 530 15 −20

d
E6218-N3M1 A 620 540 to 620 21 −50
E6218-P2 A 620 530 15 −30
E6245-P2 A 620 530 15 −30
E6910-G A and/or P 690 600 14 —
E6911-G A and/or P 690 600 14 —
E6913-G A and/or P 690 600 11 —
E6915-G A and/or P 690 600 14 —
E6916-G A and/or P 690 600 14 —
E6918-G A and/or P 690 600 14 —
E6915-4 M2 P 690 600 14 −50
10 © ISO 2011 – All rights reserved

ISO 18275:2011(E)
Table 8B (continued)
ab
Tensile Yield strength Minimum Temperature of
a c
Classification, strength elongation Charpy V notch
a
compulsory section  determination

MPa MPa % °C
E6916-4 M2 P 690 600 14 −50
E6916-N3CM1 A 690 600 14 −20
E6916-N4M3 A and/or P 690 600 14 −20
E6916-N7CM3 A 690 600 14
−60
E6918-4 M2 P 690 600 14
−50
E6945-P2 A 690 600 14 −30
d
E6918-N3M2 A 690 18 −50
610 to 690
E7610-G A and/or P 760 670 13 —
E7611-G A and/or P 760 670 13 —
E7613-G A and/or P 760 670 11 —
E7615-G A and/or P 760 670 13 —
E7616-G A and/or P 760 670 13 —
E7618-G A and/or P 760 670 13 —

d
E7618-N4M2 A 760 18
680 to 760 −50
E7816-N4CM2 A 780 690 13 −20
E7816-N4C2M1 A 780 690 13
−40
E7816-N5M4 A 780 690 13
−60
E7816-N5CM3 A and/or P 780 690 13 −20

E7816-N9M3 A 780 690 13 −80
E8310-G A and/or P 830 740 12 —
E8311-G A and/or P 830 740 12 —
E8313-G A and/or P 830 740 10 —
E8315-G A and/or P 830 740 12 —
E8316-G A and/or P 830 740 12 —
E8318-G A and/or P 830 740 12 —

d
E8318-N4C2M2 A 830 16
745 to 830 −50
a
Single values are minima. Not specified = —.
b
For yield strength, the lower yield strength (R ) shall be used when yielding occurs, otherwise, the 0,2 % proof strength (R ) shall
eL p0,2
be used.
c
The gauge length is equal to five times the specimen diameter.
d
For 2,4 mm electrodes, the upper limit may be 35 MPa greater.

ISO 18275:2011(E)
Table 9B — Chemical composition requirements
(Classification by tensile strength and 27 J impact energy)
a
Chemical composition, % (by mass)
Classification,
compulsory section
C Si Mn P S Ni Cr Mo Others
E5916-3 M2 A 1,00 to 0,25 to
0,12 0,60 0,03 0,03 0,90 — —
and/or P 1,75 0,45
E5916-N1M1 A 0,70 to 0,30 to 0,10 to
0,12 0,80 0,03 0,03 — —
and/or P 1,50 1,00 0,40
E5916-N5M1 A 0,60 to 2,00 to
0,12 0,80 0,03 0,03 — 0,30 —
and/or P 1,20 2,75
E5918-N1M1 A 0,70 to 0,30 to 0,10 to
0,12 0,80 0,03 0,03 — —
and/or P 1,50 1,00 0,40
b
V: 0,10
E6210-G A
b b b b b
— — —
0,80 1,00 0,50 0,30 0,20
and/or P
b
Cu: 0,20
E6210–P1 A 0,20 0,60 1,20 0,03 0,03 1,00 0,30 0,50 V: 0,10
b
V: 0,10
E6211-G A
b b b b b
— — —
0,80 1,00 0,50 0,30 0,20
and/or P
b
Cu: 0,20
b
V: 0,10
E6213-G A
b b b b b
— 0,80 1,00 — — 0,50 0,30 0,20
and/or P
b
Cu: 0,20
b
V: 0,10
E6215-G A
b b b b b
— — —
0,80 1,00 0,50 0,30 0,20
and/or P
b
Cu: 0,20
b
V: 0,10
E6216-G A
b b b b b
— 0,80 1,00 — — 0,50 0,30 0,20
and/or P
b
Cu: 0,20
b
V: 0,10
E6218-G A
b b b b b
— — —
0,80 1,00 0,50 0,30 0,20
and/or P
b
Cu: 0,20
0,90 to
E6218-P2 A 0,12 0,80 0,03 0,03 1,00 0,20 0,50 V: 0,05
1,70
0,40 to 6,00 to
E6215-N13L P 0,05 0,50 0,03 0,03 — — —
1,00 7,25
1,00 to 0,25 to
E6215-3 M2 P 0,12 0,60 0,03 0,03 0,90 — —
1,75 0,45
E6216-3 M2 A 1,00 to 0,20 to
0,12 0,60 0,03 0,03 0,90 — —
and/or P 1,75 0,50
E6216-N1M1 A 0,70 to 0,30 to 0,10 to
0,12 0,80 0,03 0,03 — —
and/or P 1,50 1,00 0,40
E6216-N2M1 A 0,70 to 0,80 to 0,10 to
0,12 0,80 0,03 0,03 — —
and/or P 1,50 1,50 0,40
E6216-N4M1 A 0,75 to 1,30 to 0,10 to
0,12 0,80 0,03 0,03 — —
and/or P 1,35 2,30 0,30
E6216-N5M1 A 0,60 to 2,00 to
0,12 0,80 0,03 0,03 — 0,30 —
and/or P 1,20 2,75
1,00 to 0,25 to
E6218-3 M2 P 0,12 0,80 0,03 0,03 0,90 — —
1,75 0,45
1,00 to 0,40 to
E6218-3 M3 P 0,12 0,80 0,03 0,03 0,90 — —
1,80 0,65
12 © ISO 2011 – All rights reserved

ISO 18275:2011(E)
Table 9B (continued)
a
Chemical composition, % (by mass)
Classification,
compulsory section
C Si Mn P S Ni Cr Mo Others
E6218-N1M1 A 0,70 to 0,30 to 0,10 to
0,12 0,80 0,03 0,03 — —
and/or P 1,50 1,00 0,40
E6218-N2M1 A 0,70 to 0,80 to 0,10 to
0,12 0,80 0,03 0,03 — —
and/or P 1,50 1,50 0,40
0,60 to 1,40 to
E6218-N3M1 A 0,10 0,80 0,030 0,030 0,15 0,35 V: 0,05
1,25 1,80
0,90 to
E6245-P2 A 0,12 0,80 0,03 0,03 1,00 0,20 0,50 V: 0,05
1,70
b
V: 0,10
E6910-G A
b b b b b
— — —
0,80 1,00 0,50 0,30 0,20
and/or P
b
Cu: 0,20
b
V: 0,10
E6911-G A
b b b b b
— 0,80 1,00 — — 0,50 0,30 0,20

and/or P
b
Cu: 0,20
b
V: 0,10
E6913-G A
b b b b b
— — —
0,80 1,00 0,50 0,30 0,20
and/or P
b
Cu: 0,20
b
V: 0,10
E6915-G A
b b b b b
— — —
0,80 1,00 0,50 0,30 0,20
and/or P
b
Cu: 0,20
b
V: 0,10
E6916-G A
b b b b b
— 0,80 1,00 — — 0,50 0,30 0,20
and/or P
b
Cu: 0,20
b
V: 0,10
E6918-G A
b b b b b
— — —
0,80 1,00 0,50 0,30 0,20
and/or P
b
Cu: 0,20
1,65 to 0,25 to
E6915-4 M2 P 0,15 0,60 0,03 0,03 0,90 — —
2,00 0,45
1,65 to 0,25 to
E6916-4 M2 P 0,15 0,60 0,03 0,03 0,90 — —
2,00 0,45
1,20 to 1,20 to 0,10 to 0,10 to
E6916-N3CM1 A 0,12 0,80 0,03 0,03 —
1,70 1,70 0,30 0,30
E6916-N4M3 A 0,70 to 1,50 to 0,35 to
0,12 0,80 0,03 0,03 — —
and/or P 1,50 2,50 0,65
0,80 to 3,00 to 0,10 to 0,30 to
E6916-N7CM3 A 0,12 0,80 0,03 0,03 —
1,40 3,80 0,40 0,60
1,65 to 0,25 to
E6918-4 M2 P 0,15 0,80 0,03 0,03 0,90 — —
2,00 0,45
0,75 to 1,40 to 0,25 to
E6918-N3M2 A 0,10 0,60 0,030 0,030 0,35 V: 0,05
1,70 2,10 0,50
0,90 to
E6945-P2 A 0,12 0,80 0,03 0,03 1,00 0,20 0,50 V: 0,05
1,70
b
V: 0,10
E7610-G A
b b b b b
— — —
0,80 1,00 0,50 0,30 0,20
and/or P b
Cu: 0,20
b
V: 0,10
E7611-G A
b b b b b
— 0,80 1,00 — — 0,50 0,30 0,20
and/or P
b
Cu: 0,20
ISO 18275:2011(E)
Table 9B (continued)
a
Chemical composition, % (by mass)
Classification,
compulsory section
C Si Mn P S Ni Cr Mo Others
b
V: 0,10
E7613-G A
b b b b b
— 0,80 1,00 — — 0,50 0,30 0,20

and/or P
b
Cu: 0,20
b
V: 0,10
E7615-G A
b b b b b
— — —
0,80 1,00 0,50 0,30 0,20
and/or P
b
Cu: 0,20
b
V: 0,10
E7616-G A
b b b b b
— 0,80 1,00 — — 0,50 0,30 0,20
and/or
...