SIST EN ISO 13918:2008
Welding - Studs and ceramic ferrules for arc stud welding (ISO 13918:2008)
Welding - Studs and ceramic ferrules for arc stud welding (ISO 13918:2008)
This International Standard specifies: requirements for studs and ceramic ferrules for arc stud welding; dimensions, materials, mechanical properties and, when required, conditions of evaluation of conformity.
Schweißen - Bolzen und Keramikringe für das Lichtbogenbolzenschweißen (ISO 13918:2008)
Diese Internationale Norm legt Anforderungen für Bolzen und Keramikringe für das Lichtbogenbolzen¬schweißen fest.
Diese Internationale Norm legt Maße, Werkstoffe, mechanische Eigenschaften und, wenn erforderlich, Bedin-gungen für die Konformitätsbewertung fest.
Tabelle 1 zeigt Bolzentypen und die Kurzzeichen für Bolzen und Keramikringe, die in dieser Internationalen Norm verwendet werden.
Soudage - Goujons et bagues céramiques pour le soudage a l'arc des goujons (ISO 13918:2008)
L'ISO 13918:2008 spécifie ce qui suit:
les exigences relatives aux goujons et aux bagues en céramique dans le cadre du soudage des goujons;
les dimensions, les matériaux constitutifs et les propriétés mécaniques des goujons.
Varjenje - Čepi in keramični obroči za obločno varjenje čepov (ISO 13918:2008)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 13918:2008
01-september-2008
1DGRPHãþD
SIST EN ISO 13918:1999
9DUMHQMHýHSLLQNHUDPLþQLREURþL]DREORþQRYDUMHQMHþHSRY ,62
Welding - Studs and ceramic ferrules for arc stud welding (ISO 13918:2008)
Schweißen - Bolzen und Keramikringe für das Lichtbogenbolzenschweißen (ISO
13918:2008)
Soudage - Goujons et bagues céramiques pour le soudage a l'arc des goujons (ISO
13918:2008)
Ta slovenski standard je istoveten z: EN ISO 13918:2008
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
25.160.10 Varilni postopki in varjenje Welding processes
SIST EN ISO 13918:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 13918:2008
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SIST EN ISO 13918:2008
EUROPEAN STANDARD
EN ISO 13918
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2008
ICS 21.060.10; 25.160.10 Supersedes EN ISO 13918:1998
English Version
Welding - Studs and ceramic ferrules for arc stud welding (ISO
13918:2008)
Soudage - Goujons et bagues céramiques pour le soudage Schweißen - Bolzen und Keramikringe für das
à l'arc des goujons (ISO 13918:2008) Lichtbogenbolzenschweißen (ISO 13918:2008)
This European Standard was approved by CEN on 16 January 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13918:2008: E
worldwide for CEN national Members.
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SIST EN ISO 13918:2008
EN ISO 13918:2008 (E)
Contents Page
Foreword.3
2
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SIST EN ISO 13918:2008
EN ISO 13918:2008 (E)
Foreword
This document (EN ISO 13918:2008) has been prepared by Technical Committee ISO/TC 44 "Welding and
allied processes" in collaboration with 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 2008, and conflicting national standards shall be withdrawn
at the latest by November 2008.
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 ISO 13918:1998.
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, 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 and the United Kingdom.
Endorsement notice
The text of ISO 13918:2008 has been approved by CEN as a EN ISO 13918:2008 without any modification.
3
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SIST EN ISO 13918:2008
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SIST EN ISO 13918:2008
INTERNATIONAL ISO
STANDARD 13918
Second edition
2008-02-15
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 13918:2008(E)
©
ISO 2008
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SIST EN ISO 13918:2008
ISO 13918:2008(E)
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© ISO 2008
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ii © ISO 2008 – All rights reserved
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SIST EN ISO 13918:2008
ISO 13918:2008(E)
Contents Page
Foreword. v
Introduction . vi
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
5.4 Durability . 5
6 Testing for conformity evaluation. 5
6.1 General. 5
6.2 Testing for dangerous substances . 5
6.3 Testing of dimensional requirements of the studs . 5
6.4 Testing of mechanical characteristics of studs . 5
6.5 Weldability . 6
7 Evaluation of conformity. 6
7.1 General. 6
7.2 Initial type testing . 6
7.3 Factory production control (FPC) . 7
8 Documentation of test results . 9
9 Dimensions of studs. 10
9.1 General. 10
9.2 Threaded stud (PD). 10
9.3 Threaded stud with reduced shaft (RD). 12
9.4 Unthreaded stud (UD). 13
9.5 Stud with internal thread (ID). 14
9.6 Shear connector (SD) . 15
9.7 Threaded stud with flange (PS) . 16
9.8 Unthreaded stud (US). 18
9.9 Stud with internal thread (IS). 19
9.10 Threaded stud (PT) . 20
9.11 Unthreaded stud (UT) . 21
9.12 Stud with internal thread (IT). 22
10 Dimensions of ceramic ferrules . 23
10.1 General. 23
10.2 Ceramic ferrule for threaded stud (PF). 23
10.3 Ceramic ferrule for unthreaded stud and shear connector (UF) . 24
10.4 Ceramic ferrule for threaded stud with reduced shaft (RF). 25
11 Manufacture and finish. 25
11.1 Threaded studs (PD), unthreaded studs (UD), threaded studs with reduced shaft (RD). 25
11.2 Shear connectors (SD) . 25
12 Inspection . 26
12.1 General. 26
12.2 Chemical analysis. 26
© ISO 2008 – All rights reserved iii
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SIST EN ISO 13918:2008
ISO 13918:2008(E)
12.3 Mechanical tests . 26
12.4 Sample size. 26
13 Marking. 27
13.1 Studs . 27
13.2 Ceramic ferrules. 27
14 Designation. 27
14.1 Studs . 27
14.2 Ceramic ferrules. 28
Annex A (informative) Mass of studs. 29
Bibliography . 32
iv © ISO 2008 – All rights reserved
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SIST EN ISO 13918:2008
ISO 13918:2008(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.
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.
ISO 13918 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 10, Unification of requirements in the field of metal welding.
This second edition cancels and replaces the first edition (ISO 13918:1998), which has been technically
revised.
© ISO 2008 – All rights reserved v
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SIST EN ISO 13918:2008
ISO 13918:2008(E)
Introduction
The range of types of studs specified in this International Standard represents customary applications.
This International Standard can be used in all fields of the metal-working industry.
vi © ISO 2008 – All rights reserved
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SIST EN ISO 13918:2008
INTERNATIONAL STANDARD ISO 13918:2008(E)
Welding — Studs and ceramic ferrules for arc stud welding
1 Scope
This International Standard specifies:
⎯ requirements for studs and ceramic ferrules for arc stud welding;
⎯ dimensions, materials, mechanical properties and, when required, conditions of evaluation of conformity.
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 Symbol for Symbol for
Type of stud
studs ceramic ferrules
threaded stud (pitch) PD PF
threaded stud with reduced shaft RD RF
Drawn arc stud welding
with ceramic ferrule or
unthreaded stud UD UF
shielding gas
stud with internal thread ID UF
shear connector SD UF
threaded stud with flange (pitch) PS —
Short-cycle drawn arc
unthreaded stud US —
stud welding
stud with internal thread IS —
threaded stud (pitch) PT —
Stud welding with tip
unthreaded stud UT —
ignition
stud with internal thread IT —
a
Further types of stud and ceramic ferrules can be specified as required for special applications.
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 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws
and studs
ISO 3506-1, Mechanical properties of corrosion-resistant stainless-steel fasteners — Part 1: Bolts, screws and
studs
ISO 4042, Fasteners — Electroplated coatings
© ISO 2008 – All rights reserved 1
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SIST EN ISO 13918:2008
ISO 13918:2008(E)
ISO 4759-1, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B and C
ISO 4964, Steel — Hardness conversions
ISO 6892, Metallic materials — Tensile testing at ambient temperature
ISO 6947, Welds — Working positions — Definitions of angles of slope and rotation
ISO 14555, Welding — Arc stud welding of metallic materials
ISO/TR 15608, Welding — Guidelines for a metallic materials grouping system
EN 573-3, Aluminium and aluminium alloys — Chemical composition and form of wrought products — Part 3:
Chemical composition and form of products
EN 1301-2, Aluminium and aluminium alloys — Drawn wire — Part 2: Mechanical properties
EN 10088-1, Stainless steels — Part 1: List of stainless steels
EN 12166, Copper and copper alloys — Wire for general purposes
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14555 and the following apply.
3.1
inspection lot
arrangement of units of which a random sample is taken for testing and which requires the same chemical
composition of the raw material, the same diameter of the finished product and the same manufacturing
procedure during the stud production
3.2
manufacturing lot
quantity of studs of a single designation including type of stud, size, property class and material, manufactured
from bar, wire, rod or flat product from a single cast, processed through the same or similar steps at the same
time or over a continuous time period through the same heat treatment and/or coating process, if any
NOTE Same heat treatment or coating process means:
⎯ for a continuous process, the same treatment cycle without any setting modification;
⎯ for a discontinuous process, the same treatment cycle for identical consecutive loads (batches).
The manufacturing lot can be split into a number of manufacturing batches for processing purposes and then reassembled
into the same manufacturing lot.
[Adapted from ISO 15330:1999, definition 3.3]
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
2 © ISO 2008 – All rights reserved
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SIST EN ISO 13918:2008
ISO 13918:2008(E)
d diameter of the tip
4
d head diameter of headed studs
5
D internal thread diameter
6
D nominal diameter of the ceramic ferrule
7
d grip diameter
8
d base diameter of the ceramic ferrule
9
h height of the flange
1
h height of the ceramic ferrule
2
h height of the head on headed stud
3
h height of the weld collar
4
h height of the unthreaded part of stud types PS and PT
5
l overall length of the stud (excluding aluminium ball or welding tip)
1
l nominal length of the stud
2
l length of the welding tip
3
y length of the unthreaded part
α face angle
5 Requirements
5.1 Ordering information
At the time of order the manufacturer shall obtain the following information:
a) reference to this International Standard 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 9.
For coated threaded studs the tolerances shall apply before coating.
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SIST EN ISO 13918:2008
ISO 13918:2008(E)
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.
5.3.3.2 Shear strength
Shear strength shall be checked by testing the minimum tensile strength of the studs.
Table 2 — Materials and mechanical characteristics of finished studs
Symbol Material/ Standard Mechanical properties
Material group/ of the finished stud
Property class
PD 4.8 ISO 898-1 See ISO 898-1
RD
A2-50, A2-70, A4-50,
UD
ISO 3506-1 See ISO 3506-1
A4-70, A5-50, A5-70
ID
2
R W 450 N/mm
m
Material group 1 with the
2
SD1 R W 350 N/mm
eH
limits:
A W 15 %
5
a
C u 0,2 %
ISO/TR 15608
2 2
R = 400 N/mm to 550 N/mm
m
a 2
CEV u 0,35 R W 235 N/mm
eH
SD2
2
R W 235 N/mm
a, b
p0,2
Al W 0,02 %
A W 20 %
5
2 2
R = 500 N/mm to 780 N/mm
1.4301
m
2
SD3 EN 10088-1 R W 350 N/mm
p0,2
1.4303
A W 25 %
5
PS 4.8 ISO 898-1 See ISO 898-1
US
A2-50 ISO 3506-1 See ISO 3506-1
IS
4.8 ISO 898-1 See ISO 898-1
PT
A2-50 ISO 3506-1 See ISO 3506-1
2
UT
CuZn37 EN 12166 R W 370 N/mm
m
2
1050A EN 573-3 R W 100 N/mm
IT m
2
5754 EN 1301-2 R W 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.
4 © ISO 2008 – All rights reserved
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SIST EN ISO 13918:2008
ISO 13918:2008(E)
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 u 0,20 %. Free-cutting steel studs are generally not weldable. Killed materials shall be used.
Austenitic stainless steel studs are generally weldable. Free-cutting steel studs are generally not weldable.
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 assured for a reasonable economic working life if the studs comply with
the requirements of this International Standard.
6 Testing for conformity evaluation
6.1 General
When a conformity evaluation is required, 6.2 to 6.5 apply.
6.2 Testing for dangerous substances
Release of dangerous substances may be assessed indirectly by controlling the content of the substances in
the materials used.
6.3 Testing of dimensional requirements of the studs
The dimensions of the studs given in Tables 6 to 16 shall be checked by standard gauges or measuring
equipment with an accuracy u 10 % of the given tolerances.
6.4 Testing of mechanical characteristics of studs
The mechanical characteristics of studs shall be tested in accordance with Table 3.
Table 3 — Mechanical characteristics of studs to be tested
Reference standard
Threaded studs Unthreaded
Mechanical characteristic Test
studs
Carbon steel
Stainless steel
and alloy steel
Elongation
Tensile strength
Tensile test ISO 898-1 ISO 3506-1 ISO 6892
Yield strength
Shear strength
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SIST EN ISO 13918:2008
ISO 13918:2008(E)
The tensile test to be used shall be a full-size tensile test. However, if the dimensions of the studs do not allow
a full-size tensile test, the test may be carried out on the raw material provided the mechanical properties
corresponding to those of the current part of the stud are not modified by the manufacturing process.
If tensile testing is not possible, a hardness test shall be carried out for ferritic materials, thus determining the
tensile strength in accordance with ISO 4964. The particular properties of the cold-formed material, especially
in the peripheral zone, shall be taken into account. For cold-formed studs, the mean value of a minimum of
three test points shall be determined, whereas the whole cross-section shall be included. This mean value
shall achieve at least the tensile strength according to Table 3. For the rest, the mechanical properties of the
raw material shall be used.
The correlation of hardness and tensile strength is laid down likewise in ISO/TR 10108.
6.5 Weldability
A material is considered weldable if a qualified welding procedure can be developed for the material
(see ISO 14555).
7 Evaluation of conformity
7.1 General
When an evaluation of conformity is required, 7.2 and 7.3 apply.
The conformity of the studs to the requirements of this International Standard shall be demonstrated by:
⎯ initial type testing;
⎯ factory production control by the manufacturer, including product assessment.
For the purposes of testing, the products may be grouped into families where it is considered that the selected
properties are common to all the products within that family.
7.2 Initial type testing
7.2.1 General
An initial type test is the complete set of tests or other procedures determining the performance of samples of
products representative of the product type.
Initial type testing shall be performed to show conformity with this International Standard on its first use for
products being put on to the market and:
⎯ at the beginning of the production of a new type of stud or different raw material;
⎯ at the beginning of a new or modified method of production.
In the case of products for which initial type testing in accordance with this International Standard was already
performed, testing may be reduced:
⎯ if it has been established that the performance characteristics compared with the products already tested
have not been affected or
⎯ in accordance with the rules for grouping and/or direct application or application by extrapolation of test
results.
6 © ISO 2008 – All rights reserved
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SIST EN ISO 13918:2008
ISO 13918:2008(E)
NOTE Studs CE marked in accordance with appropriate specifications may be presumed to have the performance
stated with the CE marking, although this does not replace the responsibility of the stud manufacturer to ensure that the
stud is correctly designed and has the necessary performance values to meet the design.
7.2.2 Characteristics
All characteristics in Clause 5 shall be subject to initial type testing, with the following exception:
⎯ release of dangerous substances may be assessed indirectly by controlling the content of the substance
concerned.
7.2.3 Use of historical data
Tests previously performed on the same products in accordance with the provisions of this International
Standard (same characteristics, test method, sampling procedure, system of attestation of conformity, etc.)
may be taken into account.
7.2.4 Sampling, testing and conformity crit
...
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