Welding consumables - Fluxes for submerged arc welding and electroslag welding - Classification (ISO 14174:2019)

This document specifies requirements for classification of fluxes for submerged arc welding and electroslag welding for joining and overlay welding using wire electrodes, tubular cored electrodes, and strip electrodes.
NOTE This document was based on EN 760:1996.

Schweißzusätze - Pulver zum Unterpulverschweißen und Elektroschlackeschweißen - Einteilung (ISO 14174:2019)

Dieses Dokument legt Anforderungen für die Einteilung von Pulver zum Unterpulverschweißen und Elektroschlackeschweißen mit Draht , Fülldraht  und Bandelektroden zum Verbindungs  und Auftragschweißen fest.
ANMERKUNG   Dieses Dokument basiert auf EN 760:1996.

Produits consommables pour le soudage - Flux pour le soudage à l'arc sous flux et le soudage sous laitier - Classification (ISO 14174:2019)

Le présent document spécifie les exigences de classification des flux pour le soudage à l'arc sous flux et le soudage sous laitier pour l'assemblage et le rechargement par soudage au moyen de fils-électrodes, de fils-électrodes fourrés et de feuillards.
NOTE Le présent document est basé sur l'EN 760:1996.

Dodajni materiali za varjenje - Praški za obločno varjenje pod praškom in pod žlindro - Razvrstitev (ISO 14174:2019)

V tem dokumentu so opredeljene zahteve za razvrščanje praškov za obločno varjenje pod praškom in pod žlindro za spajanje ter prekrivno varjenje z uporabo žičnih, strženskih in tračnih elektrod.
OPOMBA: Ta dokument temelji na standardu EN 760:1996.

General Information

Status
Published
Publication Date
14-May-2019
Technical Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
15-May-2019
Completion Date
15-May-2019

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SLOVENSKI STANDARD
SIST EN ISO 14174:2019
01-september-2019
Nadomešča:
SIST EN ISO 14174:2012
Dodajni materiali za varjenje - Praški za obločno varjenje pod praškom in pod
žlindro - Razvrstitev (ISO 14174:2019)
Welding consumables - Fluxes for submerged arc welding and electroslag welding -
Classification (ISO 14174:2019)
Schweißzusätze - Pulver zum Unterpulverschweißen und Elektroschlackeschweißen -
Einteilung (ISO 14174:2019)

Produits consommables pour le soudage - Flux pour le soudage à l'arc sous flux et le

soudage sous laitier - Classification (ISO 14174:2019)
Ta slovenski standard je istoveten z: EN ISO 14174:2019
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
SIST EN ISO 14174:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 14174:2019
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SIST EN ISO 14174:2019
EN ISO 14174
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2019
EUROPÄISCHE NORM
ICS 25.160.20 Supersedes EN ISO 14174:2012
English Version
Welding consumables - Fluxes for submerged arc welding
and electroslag welding - Classification (ISO 14174:2019)

Produits consommables pour le soudage - Flux pour le Schweißzusätze - Pulver zum Unterpulverschweißen

soudage à l'arc sous flux et le soudage sous laitier - und Elektroschlackeschweißen - Einteilung (ISO

Classification (ISO 14174:2019) 14174:2019)
This European Standard was approved by CEN on 8 May 2019.

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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14174:2019 E

worldwide for CEN national Members.
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SIST EN ISO 14174:2019
EN ISO 14174:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 14174:2019
EN ISO 14174:2019 (E)
European foreword

This document (EN ISO 14174:2019) 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 November 2019, and conflicting national standards

shall be withdrawn at the latest by November 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 14174:2012.

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 14174:2019 has been approved by CEN as EN ISO 14174:2019 without any modification.

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SIST EN ISO 14174:2019
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SIST EN ISO 14174:2019
INTERNATIONAL ISO
STANDARD 14174
Third edition
2019-04
Welding consumables — Fluxes
for submerged arc welding and
electroslag welding — Classification
Produits consommables pour le soudage — Flux pour le soudage à
l'arc sous flux et le soudage sous laitier — Classification
Reference number
ISO 14174:2019(E)
ISO 2019
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SIST EN ISO 14174:2019
ISO 14174:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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 2019 – All rights reserved
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SIST EN ISO 14174:2019
ISO 14174:2019(E)
Contents Page

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

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

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

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

4 Classification ............................................................................................................................................................................................................ 1

5 Symbols .......................................................................................................................................................................................................................... 2

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

5.2 Symbol for method of manufacture ...................................................................................................................................... 2

5.3 Symbol for type of flux, characteristic chemical constituents ........................................................................ 2

5.4 Symbol for applications, flux class ......................................................................................................................................... 2

5.4.1 General...................................................................................................................................................................................... 2

5.4.2 Flux class 1 ............................................................................................................................................................................ 3

5.4.3 Flux classes 2 and 2B ................................................................................................................................................... 3

5.4.4 Flux class 3 ............................................................................................................................................................................ 3

5.4.5 Flux class 4 ............................................................................................................................................................................ 3

5.5 Symbol for metallurgical behaviour ..................................................................................................................................... 5

5.5.1 General...................................................................................................................................................................................... 5

5.5.2 Metallurgical behaviour, flux class 1 ............................................................................................................... 5

5.5.3 Metallurgical behaviour, flux classes 2 and 2B ...................................................................................... 5

5.5.4 Metallurgical behaviour, flux class 3 ............................................................................................................... 6

5.5.5 Metallurgical behaviour, flux class 4 ............................................................................................................... 6

5.5.6 Determination of symbols for metallurgical behaviour ................................................................. 6

5.6 Symbol for type of current ............................................................................................................................................................ 7

5.7 Symbol for diffusible hydrogen content in deposited weld metal (class 1 fluxes only) ......... .. 7

6 Particle size range ............................................................................................................................................................................................... 8

7 Rounding procedure ......................................................................................................................................................................................... 8

8 Retest ................................................................................................................................................................................................................................ 8

9 Technical delivery conditions ................................................................................................................................................................. 9

10 Marking .......................................................................................................................................................................................................................... 9

11 Designation ................................................................................................................................................................................................................ 9

Annex A (informative) Characteristic chemical constituents of flux — Example of

determination from elemental analysis ....................................................................................................................................11

Annex B (informative) Description of flux types ...................................................................................................................................13

Bibliography .............................................................................................................................................................................................................................16

© ISO 2019 – All rights reserved iii
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SIST EN ISO 14174:2019
ISO 14174:2019(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 on 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 the following

URL: 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.

This third edition cancels and replaces the second edition (ISO 14174:2012), which has been technically

revised. The main changes compared to the previous edition are as follows:
— Subclause 5.4.3 now clarifies burn-out;
— ISO 18724 has been added to Clause 2;
— Table 3 has been expanded;
— Table 5 for flux class 2, welding current and voltage have been revised;
— an example of a Z option has been added;

— information on IIW Round robin testing of fluxes has been added to Annex B and as a bibliographical

reference;
— Clause B.16 has been corrected to include CaF (to align with EN 760).

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.

iv © ISO 2019 – All rights reserved
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SIST EN ISO 14174:2019
INTERNATIONAL STANDARD ISO 14174:2019(E)
Welding consumables — Fluxes for submerged arc welding
and electroslag welding — Classification
1 Scope

This document specifies requirements for classification of fluxes for submerged arc welding and

electroslag welding for joining and overlay welding using wire electrodes, tubular cored electrodes,

and strip electrodes.
NOTE This document was based on EN 760:1996.
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 3690, Welding and allied processes — Determination of hydrogen content in arc weld metal

ISO 14171, Welding consumables — Solid wire electrodes, tubular cored electrodes and electrode/flux

combinations for submerged arc welding of non alloy and fine grain steels — Classification

ISO 14343, Welding consumables — Wire electrodes, strip electrodes, wires and rods for arc welding of

stainless and heat resisting steels — Classification

ISO 18274, Welding consumables — Solid wire electrodes, solid strip electrodes, solid wires and solid rods

for fusion welding of nickel and nickel alloys — Classification

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

3 Terms and definitions
No terms and definitions are listed in this document.

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 http: //www .electropedia .org/
4 Classification

Fluxes for submerged arc welding and electroslag welding for joining and overlay welding are granular,

fusible products of mainly mineral origin, which are manufactured by various methods. Fluxes

influence the chemical composition and the mechanical properties of the weld metal.

The classification of the fluxes is divided into seven parts:
1) the first part gives a symbol indicating the product/process (see 5.1);

2) the second part gives a symbol indicating the method of manufacture (see 5.2);

3) the third part gives a symbol indicating the type of flux, characteristic chemical constituents

(see Table 1);
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SIST EN ISO 14174:2019
ISO 14174:2019(E)

4) the fourth part gives a symbol indicating the applications, flux class (see 5.4);

5) the fifth part gives a symbol indicating the metallurgical behaviour (see 5.5);

6) the sixth part gives a symbol indicating the type of current (see 5.6);

7) the seventh part gives a symbol indicating the diffusible hydrogen content of deposited weld metal

(see Table 6) — only applicable for class 1 fluxes.
The classification is divided into two sections.

a) the compulsory section, which includes the symbols for process, method of manufacture,

characteristic chemical constituents, and applications, i.e. the symbols defined in 5.1, 5.2, 5.3 and 5.4.

b) the optional section, which includes the symbols for the metallurgical behaviour, type of current,

and diffusible hydrogen, i.e. the symbols defined in 5.5, 5.6 and 5.7.
5 Symbols
5.1 Symbol for the product/process

The symbol for the flux used in submerged arc welding for joining and overlay welding shall be the letter

S and for the flux used in electroslag welding for joining and overlay welding shall be the letters ES.

5.2 Symbol for method of manufacture
The symbol below indicates the method of manufacture:
— F: fused flux;
— A: agglomerated flux;
— M: mixed flux.

Fused fluxes are made by melting and granulating. Agglomerated fluxes are bound, granular mixtures

of finer raw materials. Mixed fluxes comprise all fluxes which, after fusing or agglomerating, are mixed

with one or more additional components or fluxes.
For particle size requirements in marking, see Clause 6.
5.3 Symbol for type of flux, characteristic chemical constituents

The symbols in Table 1 indicate the type of flux in accordance with the characteristic chemical

constituents. Elemental analysis shall be performed on representative samples of the flux. Any suitable

analytical technique may be used, but in cases of dispute reference shall be made to established

methods. Based on the elemental analysis of the flux, the characteristic chemical constituents of the

flux can be determined.

Examples of such determinations are shown in Annex A and descriptions of flux types are given in

Annex B.
5.4 Symbol for applications, flux class
5.4.1 General
A given flux may carry more than one class as specified in 5.4.2 to 5.4.5.
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SIST EN ISO 14174:2019
ISO 14174:2019(E)
5.4.2 Flux class 1

These are fluxes for submerged arc welding of non-alloy and fine grain steels, high-strength steels,

creep-resisting steels, and atmospheric corrosion-resisting steels.

In general, the fluxes do not contain alloying elements, other than Mn and Si, thus the weld metal

analysis is predominantly influenced by the composition of the wire/strip electrode and metallurgical

reactions. The fluxes are suitable for joint welding and/or overlay welding. In the case of joint welding,

some fluxes can be applied for both multi-run and single-run and/or two-run technique.

In the flux designation, the digit 1 indicates class 1.
5.4.3 Flux classes 2 and 2B

These are fluxes for joint welding of stainless and heat-resisting steels and/or nickel and nickel alloys

and corrosion-resistant overlay welding . Fluxes of these classes can contain alloying elements

compensating for the burn-out (elements lost to the slag).

In the flux designation, the digit 2 is used to indicate class 2 fluxes mainly suited for joint welding, but

which can also be used for strip cladding. 2B is used for fluxes especially designed for strip cladding.

5.4.4 Flux class 3

These are fluxes mainly for hard-facing overlay welding by transfer of alloying elements from the flux,

such as C, Cr or Mo.
In the flux designation, the digit 3 indicates class 3.
5.4.5 Flux class 4

These are other fluxes for which classes 1 to 3 are not applicable, e.g. fluxes for copper alloys.

In the flux designation, the digit 4 indicates class 4.
a,b
Table 1 — Symbol for type of flux, characteristic chemical constituents
Symbol Characteristic chemical Limit of constituent
(description) constituents % (by mass)
MS MnO + SiO ≥50
(Manganese-silicate) CaO ≤15
CS CaO + MgO + SiO ≥55
(Calcium-silicate) CaO + MgO ≥15
CG CaO + MgO 5 to 50
(Calcium-magnesium) CO ≥2
Fe ≤10
CB CaO + MgO 30 to 80
(Calcium-magnesium basic) CO ≥2
Fe ≤10
Calculations can be made as shown in Annex A.

A description of the characteristics of each of the types of flux is given in Annex B.

Fluxes for which the chemical composition is not listed shall be symbolized by the letter Z. The chemical

composition ranges are not specified and it is possible that two fluxes with the same Z classification are not

interchangeable.

1) Not all fluxes suitable for use with stainless steel filler metal are also suitable for nickel and nickel alloy filler

metal.
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SIST EN ISO 14174:2019
ISO 14174:2019(E)
Table 1 (continued)
Symbol Characteristic chemical Limit of constituent
(description) constituents % (by mass)
CG-I CaO + MgO 5 to 45
(Calcium-magnesium with iron) CO ≥2
Fe 15 to 60
CB-I CaO + MgO 10 to 70
(Calcium-magnesium basic CO ≥2
with iron)
Fe 15 to 60
GS MgO + SiO ≥42
(Magnesium-silicate) Al O ≤20
2 3
CaO + CaF ≤14
ZS ZrO + SiO + MnO ≥45
2 2
(Zirconium-silicate) ZrO ≥15
RS TiO + SiO ≥50
2 2
(Rutile-silicate) TiO ≥20
AR Al O + TiO ≥40
2 3 2
(Aluminate-rutile)
BA Al O + CaF + SiO ≥55
2 3 2 2
(Basic-alumina) CaO ≥8
SiO ≤20
AAS Al O + SiO ≥50
2 3 2
(Acid-aluminium-silicate) CaF + MgO ≥20
AB Al O + CaO + MgO ≥40
2 3
(Aluminate-basic) Al O ≥20
2 3
CaF ≤22
AS Al O + SiO + ZrO ≥40
2 3 2 2
(Aluminate-silicate) CaF + MgO ≥30
ZrO ≥5
AF Al O + CaF ≥70
2 3 2
(Aluminate-fluoride-basic)
FB CaO + MgO + CaF + MnO ≥50
(Fluoride-basic) SiO ≤20
CaF ≥15
Z Any other agreed composition
Calculations can be made as shown in Annex A.

A description of the characteristics of each of the types of flux is given in Annex B.

Fluxes for which the chemical composition is not listed shall be symbolized by the letter Z. The chemical

composition ranges are not specified and it is possible that two fluxes with the same Z classification are not

interchangeable.
4 © ISO 2019 – All rights reserved
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SIST EN ISO 14174:2019
ISO 14174:2019(E)
5.5 Symbol for metallurgical behaviour
5.5.1 General

The metallurgical behaviour of a flux is characterized by the contribution (pick-up and/or burn-out) of

alloying elements. Concerning fluxes for joining, the contribution is the difference between the chemical

composition of the all-weld metal deposit and the composition of the specified electrode. Concerning

fluxes for overlay welding, the contribution is the difference between the chemical composition of the

deposited weld metal of the last bead/layer and the chemical composition of the specified wire/strip

electrode.
5.5.2 Metallurgical behaviour, flux class 1

For determining the pick-up and burn-out behaviour, a wire electrode ISO 14171-A – S2 or ISO 14171-B –

SU22 shall be used in accordance with 5.5.6. The pick-up or burn-out of the elements Si and Mn shall be

stated in this sequence.

The symbols in Table 2 indicate the metallurgical behaviour of a welding flux class 1.

Table 2 — Symbol for metallurgical behaviour of class 1 fluxes
Contribution from flux on all-weld metal
Metallurgical behaviour Symbol
% (by mass)
1 >0,7
2 0,5 to 0,7
Burn-out
3 0,3 to 0,5
4 0,1 to 0,3
Neutral 5 0,0 to 0,1
6 0,1 to 0,3
7 0,3 to 0,5
Pick-up
8 0,5 to 0,7
9 >0,7
For Si, symbols 1, 2, 3 and 4 are not used.
5.5.3 Metallurgical behaviour, flux classes 2 and 2B

For determining the pick-up or burn-out behaviour, wire or strip electrodes shall be selected in

accordance with Table 3 and shall be used in accordance with 5.5.6.

The pick-up or burn-out of the elements C, Si, Cr, and Nb shall be stated in this sequence. If the flux adds

other elements, these shall be indicated by stating the corresponding chemical symbols (e.g. Ni, Mo)

immediately after the symbols for C, Si, Cr, and Nb.

The symbols in Table 4 indicate the metallurgical behaviour for class 2 and class 2B fluxes.

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SIST EN ISO 14174:2019
ISO 14174:2019(E)

Table 3 — Electrodes used for determination of metallurgical behaviour for class 2 and class

2B fluxes
Electrode to be used
Product/
Class ISO 18274 ISO 18274
process a a
ISO 14343-A ISO 14343-B
(numerical) (chemical)
S 2 S 19 9 L SS308L N/A N/A
ES 2 S 19 9 L SS308L N/A N/A
S 2B B 19 9 L BS 308L N/A N/A
ES 2B B 19 9 L BS 308L N/A N/A
S 2 N/A N/A S Ni 6625 S NiCr22Mo9Nb
ES 2 N/A N/A S Ni 6625 S NiCr22Mo9Nb
S 2B N/A N/A B Ni 6625 S NiCr22Mo9Nb
ES 2B N/A N/A B Ni 6625 S NiCr22Mo9Nb

To determine carbon burn-out, electrodes with minimum 0,04 % (by mass) C shall be used. To determine niobium

burn-out, 19 9 Nb/347 electrodes shall be used.
N/A Not applicable.
5.5.4 Metallurgical behaviour, flux class 3

The pick-up of alloying elements shall be indicated by stating the corresponding chemical symbols (e.g.

C, Cr, Mo) and approximate amount without the % symbol. For determining the pick-up behaviour a

wire electrode, ISO 14171-A – S2 or ISO 14171-B – SU22, shall be used in accordance with 5.5.6.

5.5.5 Metallurgical behaviour, flux class 4

The pick-up of alloying elements shall be indicated by stating the corresponding chemical symbols.

Table 4 — Symbols for metallurgical behaviour for class 2 and class 2B fluxes
Contribution from flux on all-weld metal
Metallurgical
% (by mass)
Symbol
behaviour
C Si Cr Nb
1 >0,020 >0,7 >2,0 >0,20
2 symbol not used 0,5 to 0,7 1,5 to 2,0 0,15 to 0,20
Burn-out
3 0,010 to 0,020 0,3 to 0,5 1,0 to 1,5 0,10 to 0,15
4 symbol not used 0,1 to 0,3 0,5 to 1,0 0,05 to 0,10
Neutral 5 0,000 to 0,010 0,0 to 0,1 0,0 to 0,5 0,00 to 0,05
6 symbol not used 0,1 to 0,3 0,5 to 1,0 0,05 to 0,10
7 0,010 to 0,020 0,3 to 0,5 1,0 to 1,5 0,10 to 0,15
Pick-up
8 symbol not used 0,5 to 0,7 1,5 to 2,0 0,15 to 0,20
9 >0,020 >0,7 >2,0 >0,20
5.5.6 Determination of symbols for metallurgical behaviour

For the determination of symbols for class 1 and 2 fluxes, a weld metal pad shall be prepared in

accordance with Table 5. For class 3 and 4 fluxes, the weld pad shall be prepared as recommended by

the manufacturer.

The surface oxide on the sampling portion of the specimen for chemical analysis shall be removed by

machining or grinding. When taking chips from a milling, a shaping or a drilling machine, the use of

cutting fluid shall be avoided. The specimen for chemical analysis shall be taken from the weld metal of

the highest layer. The specimen shall not include the start or the crater.
6 © ISO 2019 – All rights reserved
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SIST EN ISO 14174:2019
ISO 14174:2019(E)

Any suitable analytical technique may be used, but in cases of dispute reference shall be made to

established methods.
Table 5 — Welding conditions for preparation of a weld metal pad
Product/process S ES
Flux class 1 2 2B 2B
Electrode dimension, mm 4,0 3,0 60 × 0,5 60 × 0,5
Runs per layer 2 1
Number of layers 8 3 2
Length of weld deposit, mm ≥200
Electrode extension, mm 30 ± 5 27 ± 3
Type of current Direct current electrode positive (DCEP)
Welding current, A 580 ± 20 480 ± 20 750 ± 25 1 250 ± 30
Welding voltage, V 29 ± 2 29 ± 2 28 ± 2 25 ± 2
Weldin
...

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