SIST EN ISO 13918:2018

SLOVENSKI STANDARD
SIST EN ISO 13918:2018
01-oktober-2018
1DGRPHãþD
SIST EN ISO 13918:2008
9DUMHQMHýHSLLQNHUDPLþQLREURþL]DREORþQRYDUMHQMHþHSRY,62
SRSUDYOMHQDYHU]LMD
Welding - Studs and ceramic ferrules for arc stud welding (ISO 13918:2017, Corrected
version 2018-05)
Schweißen - Bolzen und Keramikringe für das Lichtbogenbolzenschweißen (ISO
13918:2017, korrigierte Fassung 2018-05)
Soudage - Goujons et bagues céramiques pour le soudage à l'arc des goujons (ISO
13918:2017, Version corrigée 2018-05)
Ta slovenski standard je istoveten z: EN ISO 13918:2018
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
25.160.10 Varilni postopki in varjenje Welding processes
SIST EN ISO 13918:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 13918:2018

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SIST EN ISO 13918:2018


EN ISO 13918
EUROPEAN STANDARD

NORME EUROPÉENNE

January 2018
EUROPÄISCHE NORM
ICS 21.060.10; 25.160.10 Supersedes EN ISO 13918:2008
English Version

Welding - Studs and ceramic ferrules for arc stud welding
(ISO 13918:2017, Corrected version 2018-05)
Soudage - Goujons et bagues céramiques pour le Schweißen - Bolzen und Keramikringe für das
soudage à l'arc des goujons (ISO 13918:2017, Version Lichtbogenbolzenschweißen (ISO 13918:2017,
corrigée 2018-05) korrigierte Fassung 2018-05)
This European Standard was approved by CEN on 21 November 2017.

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 13918:2018 E
worldwide for CEN national Members.

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SIST EN ISO 13918:2018
EN ISO 13918:2018 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 13918:2018
EN ISO 13918:2018 (E)
European foreword
This document (EN ISO 13918:2018) 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 July 2018, and conflicting national standards shall be
withdrawn at the latest by July 2018.
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 13918:2008.
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 13918:2017, Corrected version 2018-05 has been approved by CEN as
EN ISO 13918:2018 without any modification.


3

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SIST EN ISO 13918:2018

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SIST EN ISO 13918:2018
INTERNATIONAL ISO
STANDARD 13918
Third edition
2017-11
Corrected version
2018-05
Welding — Studs and ceramic ferrules
for arc stud welding
Soudage — Goujons et bagues céramiques pour le soudage à l'arc
des goujons
Reference number
ISO 13918:2017(E)
©
ISO 2017

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SIST EN ISO 13918:2018
ISO 13918:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2017 – All rights reserved

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SIST EN ISO 13918:2018
ISO 13918:2017(E)

Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 2
5 Requirements . 3
5.1 Ordering information . 3
5.2 Dangerous substances . 3
5.3 Product requirements . 3
5.3.1 Dimensions and tolerances on dimensions, form and position . 3
5.3.2 Coating . 3
5.3.3 Materials and mechanical characteristics . 3
5.3.4 Weldability . 4
5.4 Durability . 5
6 Dimensions of studs . 5
6.1 General . 5
6.2 Fully-threaded stud (FD) . 6
6.3 Virtually fully-threaded stud (MD) . 7
6.4 Partially threaded stud (PD) . 8
6.5 Threaded stud with reduced shaft (RD) . 9
6.6 Unthreaded stud (UD) .10
6.7 Insulation pin/nail (ND) .11
6.8 Stud with internal thread (ID) .12
6.9 Shear connector (SD).13
6.10 Threaded stud with flange (PS) .14
6.11 Unthreaded stud (US) .16
6.12 Stud with internal thread (IS) .17
6.13 Threaded stud (PT) .18
6.14 Unthreaded stud (UT) .20
6.15 Stud with internal thread (IT) .21
7 Dimensions of ceramic ferrules .21
8 Manufacture .23
8.1 Fully-threaded stud (FD), virtually fully-threaded stud (MD), partially threaded
stud (PD), threaded stud with reduced shaft (RD), unthreaded stud (UD), stud
with internal thread (ID) .23
8.2 Shear connectors (SD) .23
9 Inspection .23
9.1 General .23
9.2 Chemical analysis .24
9.3 Mechanical tests .24
9.4 Sample size .24
10 Marking .24
10.1 Traceability .24
10.2 Studs .24
10.3 Ceramic ferrules .25
11 Designation .25
11.1 Studs .25
11.2 Ceramic ferrules .25
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SIST EN ISO 13918:2018
ISO 13918:2017(E)

Bibliography .26
iv © ISO 2017 – All rights reserved

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SIST EN ISO 13918:2018
ISO 13918:2017(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 10, Quality management in the field of welding.
This third edition cancels and replaces the second edition (ISO 13918:2008), which has been technically
revised.
The main changes compared to the previous edition are as follows:
a) everything according conformity evaluation has been deleted from this document;
b) fully-threaded stud (FD), virtually fully-threaded stud (MD) and insulation pin/nail (ND) have been
introduced;
c) threaded stud has been renamed to partially threaded stud (PD);
d) abbreviation P for pitch has been introduced;
e) that a stud may consist of two different materials combined by friction welding has been introduced
in 5.3.3.1;
f) value for CEV (CEV ≤ 0,38) in Table 2 has been changed;
g) SD3 materials according ISO 15510 have been introduced in Table 2;
h) PT, UT and IT materials according ISO/TR 15608 have been introduced in Table 2;
i) where applicable, the dimensions d and h are now for guidance only.
3 4
j) “y ” has been changed to “y + 2P” in Table 5, column l ;
min 2
k) “y + 1” has been changed to “y + 2P in Table 6, column d ”;
min 1
l) “α ± 2,5°” has been changed to “α ± 7°” in Table 6,column d ;
1
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SIST EN ISO 13918:2018
ISO 13918:2017(E)

m) “α ± 2,5°” has been changed to “α ± 7°” in Table 9, column D ;
6
n) “b” has been changed to “b + 2P” and values for M 5 and M 8 have been changed to 7,5 mm and
12 mm in Table 9, column D ;
6
o) the column header “d − 0,4” has been changed to “d ± 0,4” in Table 10;
1 1
p) “α ± 2,5”has been changed to “α ± 7” in Table 10;
q) the column header “b ” has been changed to “b + 2P” in Table 13;
min min
r) the column header “b” has been changed to “b + 2P” in Table 16;
min
s) a nominal diameter (d ± 0,1) of 8 mm has been introduced with an internal thread diameter (D ) of
1 6
M5 and M6 in Table 16;
t) in all tables for the dimensions of ceramic ferrules, the values for the nominal diameter (D ), the
7
grip diameter (d ), the base diameter (d ) and the height (h ) have been deleted;
8 9 2
u) Table 17 has been introduced;
v) a note that stud and ceramic ferrule are generally a coordinated system from the same manufacturer
has been introduced in Clause 7;
w) 10.1 has been introduced;
x) Annex A has been deleted;
y) figures, normative references and layout have been editorially revised.
Requests for official interpretations of any aspect of this document should be directed to the Secretariat
of ISO/TC 44 via your national standards body. A complete listing of these bodies can be found at www
.iso .org.
This corrected version of ISO 13918:2017 incorporates the following correction:
b
— footnote in Table 11 has been modified.
vi © ISO 2017 – All rights reserved

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SIST EN ISO 13918:2018
ISO 13918:2017(E)

Introduction
The range of types of studs specified in this document represents customary applications.
This document can be used in all fields of the metal-working industry.
© ISO 2017 – All rights reserved vii

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SIST EN ISO 13918:2018

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SIST EN ISO 13918:2018
INTERNATIONAL STANDARD ISO 13918:2017(E)
Welding — Studs and ceramic ferrules for arc stud welding
1 Scope
This document specifies the following:
— requirements for studs and ceramic ferrules for arc stud welding;
— dimensions, materials and mechanical properties.
Table 1 shows types of studs and the symbols for studs and ceramic ferrules that are covered by this
document.
Table 1 — Types of studs and symbols for studs and ceramic ferrules
a
Welding technique Type of stud Symbol for Symbol for
studs ceramic ferrules
Fully-threaded stud FD UF
b
Virtually fully-threaded stud MD MF
Partially threaded stud PD PF
Drawn arc stud
Threaded stud with reduced shaft RD RF
welding with
ceramic ferrule or
Unthreaded stud UD UF
shielding gas
Insulation pin/nail ND UF
Stud with internal thread ID UF
Shear connector SD UF/DF
Threaded stud with flange PS —
Short-cycle drawn
Unthreaded stud US —
arc stud welding
Stud with internal thread IS —
Threaded stud PT —
Stud welding with
Unthreaded stud UT —
tip ignition
Stud with internal thread IT —
a
Further types of stud and ceramic ferrules can be specified as required for special applications.
b
Also called MPF, stud with a nearly full thread and a minimum length of the unthreaded part.
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 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws
and studs with specified property classes — Coarse thread and fine pitch thread
ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners — Part 1: Bolts, screws
and studs
ISO 4042, Fasteners — Electroplated coatings
ISO 4759-1, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B and C
ISO 6947, Welding and allied processes — Welding positions
© ISO 2017 – All rights reserved 1

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SIST EN ISO 13918:2018
ISO 13918:2017(E)

ISO 15510, Stainless steels — Chemical composition
ISO/TR 15608, Welding — Guidelines for a metallic materials grouping system
ISO 16120-2, Non-alloy steel wire rod for conversion to wire — Part 2: Specific requirements for general
purpose wire rod
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 Symbols and abbreviated terms
b length of the thread
c depth of the crack in the head
d
d nominal diameter
1
d diameter at the weld area
2
d diameter of the weld collar
3
d diameter of the ignition tip
4
d head diameter of shear connector
5
D internal thread diameter
6
h height of the flange
1
h height of the head on shear connector
3
h height of the weld collar
4
h height of the thread run-out part of stud types PS and PT
5
l overall length of the stud (excluding aluminium ball or ignition tip)
1
l nominal length of the stud
2
l length of the ignition tip
3
P pitch
y length of the unthreaded part
α face angle
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SIST EN ISO 13918:2018
ISO 13918:2017(E)

5 Requirements
5.1 Ordering information
At the time of order, the manufacturer shall obtain the following information:
a) a reference to this document if the purchaser demands compliance;
b) quantities to be delivered;
c) complete product designation;
d) other requirements as agreed with the purchaser (e.g. low-temperature requirements).
5.2 Dangerous substances
Materials used in products shall not release any dangerous substances in excess of the maximum levels
permitted in the relevant regulations of the state of destination.
5.3 Product requirements
5.3.1 Dimensions and tolerances on dimensions, form and position
Dimensions and tolerances on dimensions form and position shall be in accordance with the
requirements given in Clause 6.
For coated threaded studs, the tolerances shall apply before coating.
Studs shall be free of defects which can affect the application.
5.3.2 Coating
Unless otherwise specified, studs PS, US, IS, PT, UT, IT of property class 4.8 shall be supplied with
electroplated copper coating (C1E).
5.3.3 Materials and mechanical characteristics
5.3.3.1 General
The materials listed in Table 2 shall be used, under the provisions of 5.3.4.
The mechanical characteristics of the studs shall comply with the specifications in Table 2.
Studs may consist of two different materials combined by friction welding (dual-material stud).
NOTE The welding part corresponds to the parent metal to avoid problems with dissimilar materials in
fusion welding, the rest generally consists of high alloy steel for enhanced corrosion resistance.
5.3.3.2 Shear strength
Shear strength shall be checked by testing the minimum tensile strength of the studs.
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SIST EN ISO 13918:2018
ISO 13918:2017(E)

Table 2 — Materials and mechanical characteristics of finished studs
Symbol Material/ Standard Mechanical properties
material group/ of the finished stud
property class
c
FD 4.8 ISO 898-1 See ISO 898-1
MD
PD
A2-50, A2-70, A4-50,
RD
c
ISO 3506-1 See ISO 3506-1
A4-70, A5-50, A5-70
UD
ID
2
ISO 16120-2 R < 450 N/mm
m
Mild steel, copper coated
C2E
ND
Austenitic stainless steel
2
ISO 15510 R < 700 N/mm
m
Material group 1 with the
limits:
2
R ≥ 450 N/mm
m
a
C ≤ 0,2 %
2
SD1 R ≥ 350 N/mm
eH
a A ≥ 15 %
5
CEV ≤ 0,38
a,b
Al ≥ 0,02 %
ISO/TR 15608
Material group 1 with the
2
R = 400 N/mm to
m
limits:
2
550 N/mm
a
C ≤ 0,2 %
2
SD2 R ≥ 235 N/mm
eH
2
R ≥ 235 N/mm
a p0,2
CEV ≤ 0,35
A ≥ 20 %
5
a,b
Al ≥ 0,02 %
2
R = 500 N/mm to
m
X5CrNi18-10 2
780 N/mm
SD3 ISO 15510
2
R ≥ 350 N/mm
p0,2
X6CrNi18-12
A ≥ 25 %
5
c
4.8 ISO 898-1 See ISO 898-1
PS
US
A2-50, A2-70, A4-50,
c
ISO 3506-1 See ISO 3506-1
IS
A4-70, A5-50, A5-70
c
4.8 ISO 898-1 See ISO 898-1
PT
A2-50, A2-70, A4-50,
c
ISO 3506-1 See ISO 3506-1
A4-70, A5-50, A5-70
UT
2
Group 32 ISO/TR 15608 R ≥ 370 N/mm
m

2
Group 21 ISO/TR 15608 R ≥ 100 N/mm
m
IT
2
Group 22.3 ISO/TR 15608 R ≥ 230 N/mm
m
a
Values from the ladle analysis.
b
If other elements for killing are used, they shall be reported in the inspection document.
c
Only weldable materials shall be used for studs.
5.3.4 Weldability
Only weldable materials shall be used for studs.
Non-alloyed steel studs are weldable if the hardness increase is low. In general, this is the case when
the carbon content is ≤0,20 %. Free-cutting steel studs are generally not weldable. Killed materials
shall be used.
Austenitic stainless steel studs are generally weldable. Free-cutting stainless steel studs are generally
not weldable.
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SIST EN ISO 13918:2018
ISO 13918:2017(E)

5.4 Durability
The durability of studs is dependent on their use and the environmental exposure to which they are
subject.
The mechanical durability of studs is ensured for a reasonable economic working life if the studs comply
with the requirements of this document.
6 Dimensions of studs
6.1 General
Nominal dimensions are listed in Tables 3 to 16. Other lengths of studs and threads may be used by
agreement between contracting parties. Divergence in outline shape, finish or dimensions shall be
permitted, provided the welding area complies with the specifications of the said tables.
The length after welding, l , is a design value. By proper control of the welding, it is possible to keep
2
variations in l to within ±1 mm. Under special conditions, for example, through-deck stud welding, l
2 2
may be constantly different from the nominal value.
The form of the central part of the stud tip comprised inside the diameter d /3 for stud types FD, UD,
1
SD (d /3 for stud types MD, PD, RD, ID) shall be at the manufacturer's discretion. The tip shall be at the
2
manufacturer's discretion in the case of flux in the form of a press-fitted aluminium ball (e.g. fl
...