ISO/PRF 14341

DRAFT INTERNATIONAL STANDARD
ISO/DIS 14341
ISO/TC 44/SC 3 Secretariat: ANSI
Voting begins on: Voting terminates on:
2019-10-28 2020-01-20
Welding consumables — Wire electrodes and weld
deposits for gas shielded metal arc welding of non alloy
and fine grain steels — Classification

Produits consommables pour le soudage — Fils-électrodes et métaux d'apport déposés en soudage à l'arc

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

Foreword ......................................................................................................................................................................... iv

Introduction..................................................................................................................................................................... v

1 Scope .......................................................................................................................................................................... 1

2 Normative references .......................................................................................................................................... 1

3 Terms and definitions .......................................................................................................................................... 1

4 Classification ........................................................................................................................................................... 2

5 Symbols and requirements ................................................................................................................................ 2

5.1 Symbol for product/process .............................................................................................................................. 2

5.2 Symbol for strength and elongation of all-weld metal ............................................................................. 3

5.3 Symbol for impact properties of all-weld metal ......................................................................................... 3

5.4 Symbol for shielding gas ..................................................................................................................................... 4

5.5 Symbol for chemical composition of wire electrodes............................................................................... 5

6 Mechanical tests .................................................................................................................................................. 11

6.1 Preheating and interpass temperatures .................................................................................................... 11

6.2 Welding conditions and pass sequence ...................................................................................................... 12

6.3 Post-weld heat-treated (PWHT) condition ................................................................................................ 13

7 Chemical analysis ............................................................................................................................................... 13

8 Rounding procedure .......................................................................................................................................... 13

9 Retests .................................................................................................................................................................... 14

10 Technical delivery conditions ........................................................................................................................ 14

11 Examples of designation .................................................................................................................................. 14

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

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

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

Any trade name used in this document is information given for the convenience of users and does not

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

This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes],

Any feedback or questions on this document should be directed to the user’s national standards body. A

Official interpretations of TC 44 documents, where they exist, are available from this page:

This third edition cancels and replaces the third edition (ISO 14341:2010), which has been technically

This document recognizes that there are two somewhat different approaches in the global market to

classifying a given wire electrode, and allows for either or both to be used, to suit a particular market

need. Application of either type of classification designation (or both where suitable) identifies a product

This document provides a classification in order to designate wire electrodes in terms of their chemical

composition and, where required, in terms of the yield strength, tensile strength and elongation of the

all-weld metal. 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 material.

Therefore, where the application requires matching tensile strength, selection of the consumable should

It should be noted that the mechanical properties of all-weld metal test specimens used to classify the

electrodes vary from those obtained in production joints because of differences in welding procedures

such as electrode size, width of weave, welding position and material composition.

This document specifies requirements for classification of wire electrodes and weld deposits in the as-

welded condition and in the post-weld heat-treated condition for gas shielded metal arc welding of non

alloy and fine grain steels with a minimum yield strength of up to 500 MPa or a minimum tensile strength

of up to 570 MPa. One wire electrode can be tested and classified with different shielding gases.

This document constitutes a combined specification providing classification utilizing a system based

upon the yield strength and the average impact energy of 47 J of all-weld metal, or utilizing a system

based upon the tensile strength and the average impact energy of 27 J of all-weld metal.

a) Clauses and tables which carry the suffix letter “A” are applicable only to wire electrodes classified

to the system based upon the yield strength and the average impact energy of 47 J of all-weld metal in

b) Clauses and tables which carry the suffix letter “B” are applicable only to wire electrodes classified

to the system based upon the tensile strength and the average impact energy of 27 J of all-weld metal in

c) Clauses and tables which have neither the suffix letter “A” nor the suffix letter “B” are applicable to

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

ISO 13916, Welding — Measurement of preheating temperature, interpass temperature and preheat

ISO 14175:2008, Welding consumables — Gases and gas mixtures for fusion welding and allied processes

ISO 15792-1:2000, Welding consumables — Test methods — Part 1: Test methods for all-weld metal test

specimens in steel, nickel and nickel alloys. Amended by ISO 15792-1:2000/Amd 1:2011

ISO 80000-1:2009, Quantities and units — Part 1: General. Corrected by ISO 80000-1:2009/Cor 1:2011

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

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.

A wire electrode shall be classified according to its chemical composition as in Table 3A or Table 3B. A

weld deposit shall be classified with additional symbols according to the mechanical properties of its all-

4A Classification by yield strength and 47 J 4B Classification by tensile strength and 27 J

The classification is divided into five parts: The classification is divided into five parts:

1) the first part gives a symbol indicating the 1) the first part gives a symbol indicating the

2) the second part gives a symbol indicating 2) the second part gives a symbol indicating

the strength and elongation of the all-weld metal the strength and elongation of the all-weld metal

3) the third part gives a symbol indicating 3) the third part gives a symbol indicating

the impact properties of the all-weld metal (see the impact properties of the all-weld metal in the

4) the fourth part gives a symbol indicating 4) the fourth part gives a symbol indicating

5) the fifth part gives a symbol indicating the 5) the fifth part gives a symbol indicating the

chemical composition of the wire electrode used chemical composition of the wire electrode used

The symbol for a weld deposit produced by gas shielded metal arc welding shall be the letter G placed at

The symbol for a wire electrode for use in gas shielded metal arc welding shall be the letter G placed at

5.2A Classification by yield strength and 47 J 5.2B Classification by tensile strength and

The symbols in Table 1A indicate the yield The symbols in Table 1B indicate the yield

strength, tensile strength, and elongation of the strength, tensile strength, and elongation of the

all-weld metal in the as-welded condition all-weld metal in the as-welded condition or in the

determined in accordance with Clause 6. post-weld heat-treated condition determined in

5.3A Classification by yield strength and 47 J 5.3B Classification by tensile strength and

The symbols in Table 2 indicate the temperature The symbols in Table 2 indicate the temperature

at which an impact energy of 47 J is achieved at which an impact energy of 27 J is achieved

Three test specimens shall be tested. Only one Five test specimens shall be tested. The lowest

individual value may be lower than 47 J but not and highest values obtained shall be disregarded.