SIST EN ISO 3506-3:2011

Mechanical properties of corrosion-resistant stainless steel fasteners - Part 3: Set screws and similar fasteners not under tensile stress (ISO 3506-3:2009)

This part of ISO 3506 specifies the mechanical properties of set screws and similar fasteners not under tensile stress made of austenitic stainless steel, when tested over an ambient temperature range of 10 °C to 35 °C.
Properties vary at higher or lower temperatures.
This part of ISO 3506 applies to set screws and similar fasteners:
⎯with nominal thread diameter 1,6 mm u d u 24 mm;
⎯of triangular ISO metric threads with diameters and pitches in accordance with ISO 68-1, ISO 261 and ISO 262;
⎯of any shape.
It does not apply to screws with special properties, such as weldability.
NOTE The designation system of this part of ISO 3506 can be used for sizes outside the limits given in this clause (e.g. d 24 mm), provided that all applicable mechanical and physical requirements of the hardness classes are met.
This part of ISO 3506 does not define corrosion or oxidation resistance in particular environments.
The aim of this part of ISO 3506 is the classification of corrosion-resistant stainless steel fasteners into hardness classes.
Corrosion and oxidation performances and mechanical properties for use at elevated or sub-zero
temperatures can be agreed on between the user and the manufacturer in each particular case. Annex D shows how the risk of intergranular corrosion at elevated temperatures depends on the carbon content. All austenitic stainless steel fasteners are normally non-magnetic in the annealed condition; after cold working, some magnetic properties can be evident (see Annex E).

Mechanische Eigenschaften von Verbindungselementen aus nichtrostenden Stählen - Teil 3: Gewindestifte und ähnliche nicht auf Zug beanspruchte Verbindungselemente (ISO 3506-3:2009)

Dieser Teil von ISO 3506 legt die mechanischen Eigenschaften von Gewindestiften und ähnlichen nicht auf
Zug beanspruchten Verbindungselementen aus austenitischen nichtrostenden Stählen bei Prüfung in einem
Umgebungstemperaturbereich zwischen 10 °C und 35 °C fest. Die Eigenschaften verändern sich bei höheren
oder tieferen Temperaturen.
Dieser Teil von ISO 3506 gilt für Gewindestifte und ähnliche Verbindungselemente
- mit Gewindenenndurchmessern 1,6 mm ≤ d ≤ 24 mm;
- mit metrischen ISO-Gewinden mit Durchmessern und Steigungen nach ISO 68-1, ISO 261 und ISO 262;
- mit beliebiger Form.
Sie gilt nicht für Gewindestifte mit besonderen Eigenschaften, wie z. B die Schweißbarkeit.
ANMERKUNG Das Bezeichnungssystem in diesem Teil von ISO 3506 darf auch für Nenngrößen außerhalb der in
diesem Abschnitt angegebenen Grenzen (z. B. d > 24 mm) verwendet werden, vorausgesetzt alle der jeweiligen
Festigkeitsklasse zugeordneten mechanischen und physikalischen Anforderungen werden erfüllt.
Dieser Teil von ISO 3506 enthält keine Festlegungen über die Korrosion oder Korrosionsbeständigkeit in
besonderen Umgebungen.
Zweck dieses Teils von ISO 3506 ist eine Einteilung von Verbindungselementen aus nichtrostenden Stählen
in Festigkeitsklassen.
Anforderungen an die Korrosionsbeständigkeit und die mechanischen Eigenschaften für den Einsatz bei
höheren Temperaturen oder bei Temperaturen unter 0 °C müssen in jedem Einzelfall zwischen Anwender und
Hersteller vereinbart werden. Im Anhang D ist dargestellt, wie die Gefahr einer interkristallinen Korrosion bei
erhöhten Temperaturen vom Kohlenstoffgehalt abhängt.
Alle Verbindungselemente aus austenitischen nichtrostenden Stählen sind im geglühten Zustand in der Regel
nicht magnetisch; es können jedoch nach dem Kaltumformen gewisse magnetische Eigenschaften vorliegen
(siehe Anhang E).

Caractéristiques mécaniques des éléments de fixation en acier inoxydable résistant à la corrosion - Partie 3: Vis sans tête et éléments de fixation similaires non soumis à des contraintes de traction (ISO 3506-3:2009)

L'ISO 3506-3:2009 spécifie les caractéristiques mécaniques des vis sans tête et des éléments de fixation filetés similaires non soumis à des contraintes de traction, constitués d'aciers inoxydables austénitiques, soumis à essai à une température ambiante comprise entre 10 °C et 35 °C. Ces caractéristiques varient selon la valeur plus ou moins élevée de la température.
L'ISO 3506-3:2009 s'applique aux vis sans tête et aux éléments de fixation filetés similaires
de diamètre nominal de filetage 1,6 mm ≤ d ≤ 24 mm,
à filetage métrique ISO triangulaire dont le diamètre et le pas sont conformes à l'ISO 68-1, l'ISO 261 et à l'ISO 262, et
de forme quelconque.
Elle ne s'applique pas aux vis possédant des caractéristiques spéciales telles que la soudabilité.

Mehanske lastnosti veznih elementov iz nerjavnega jekla - 3. del: Navojni zatiči in podobni vijaki, ki niso natezno obremenjeni (ISO 3506-3:2009)

Ta del ISO 3506 določa mehanske lastnosti navojnih zatičev in podobnih vijakov, ki niso natezno obremenjeni, narejenih iz avstenitnega nerjavnega jekla, pri preskušanju v območju okoljske temperature med 10 °C in 35 °C.
Lastnosti se spreminjajo glede na višje ali nižje temperature.
Ta del ISO 3506 velja za navojne zatiče in podobne vijake:
⎯ z nazivnim premerom navoja 1,6 mm u d u 24 mm;
⎯ s trikotnimi metrskimi navoji ISO s premeri in nakloni v skladu z ISO 68-1, ISO 261 in ISO 262;
⎯ katere koli oblike.
Ne velja za vijake s posebnimi lastnostmi, kot je varivost.
OPOMBA: Sistem označevanja v tem delu ISO 3506 se lahko uporablja za velikosti zunaj omejitev, podanih v tej točki (npr. d  24 mm), če so izpolnjene veljavne mehanske in fizikalne zahteve razredov trdote.
Ta del ISO 3506 ne opredeljuje odpornosti proti koroziji ali oksidaciji v nekaterih okoljih.
Namen tega dela ISO 3506 je razvrstitev vijakov iz nerjavnega jekla, odpornega proti koroziji, v razrede trdote.
O zmogljivostih, povezanih s korozijo in oksidacijo, ter mehanskih lastnostih za uporabo pri povišanih temperaturah ali temperaturah pod nič se lahko dogovorita uporabnik in proizvajalec za vsak posamezen primer. Dodatek D prikazuje, kako je tveganje za interkristalno korozijo pri povišanih temperaturah odvisno od vsebnosti ogljika. Vsi vezni elementi iz avstenitnega nerjavnega jekla so v nežarjenem stanju običajno nemagnetni; po hladni obdelavi so nekatere magnetne lastnosti očitne (glej dodatek E).

General Information

• Status: Published
• Public Enquiry End Date: 14-Nov-2008
• Publication Date: 05-May-2011
• ICS: 21.060.10 - Bolts, screws, studs
• ICS: 77.140.20 - Stainless steels
• Technical Committee: ISEL - Mechanical elements
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 21-Apr-2011
• Due Date: 26-Jun-2011
• Completion Date: 06-May-2011
• Ref Project: EN ISO 3506-3:2009 - Mechanical properties of corrosion-resistant stainless steel fasteners - Part 3: Set screws and similar fasteners not under tensile stress (ISO 3506-3:2009)

Relations

• Replaces: SIST EN ISO 3506-3:2001 - Mechanical properties of corrosion-resistant stainless-steel fasteners - Part 3: Set screws and similar fasteners not under tensile stress (ISO 3506-3:1997)
• Effective Date: 01-Jun-2011
• Replaces: SIST ISO 3506-3:2000 - Mechanical properties of corrosion-resistant stainless-steel fasteners -- Part 3: Set screws and similar fasteners not under tensile stress
• Effective Date: 01-May-2010
• Replaces: SIST EN ISO 3506-3:2001 - Mechanical properties of corrosion-resistant stainless-steel fasteners - Part 3: Set screws and similar fasteners not under tensile stress (ISO 3506-3:1997)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 3506-3:2011
01-junij-2011
Nadomešča:
SIST EN ISO 3506-3:2001
SIST ISO 3506-3:2000
Mehanske lastnosti veznih elementov iz nerjavnega jekla - 3. del: Navojni zatiči in
podobni vijaki, ki niso natezno obremenjeni (ISO 3506-3:2009)
Mechanical properties of corrosion-resistant stainless steel fasteners - Part 3: Set screws
and similar fasteners not under tensile stress (ISO 3506-3:2009)
Mechanische Eigenschaften von Verbindungselementen aus nichtrostenden Stählen -
Teil 3: Gewindestifte und ähnliche nicht auf Zug beanspruchte Verbindungselemente
(ISO 3506-3:2009)
Caractéristiques mécaniques des éléments de fixation en acier inoxydable résistant à la
corrosion - Partie 3: Vis sans tête et éléments de fixation similaires non soumis à des
contraintes de traction (ISO 3506-3:2009)
Ta slovenski standard je istoveten z: EN ISO 3506-3:2009
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
77.140.20 Visokokakovostna jekla Stainless steels
SIST EN ISO 3506-3:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 3506-3:2011

---------------------- Page: 2 ----------------------
SIST EN ISO 3506-3:2011


EUROPEAN STANDARD
EN ISO 3506-3

NORME EUROPÉENNE

EUROPÄISCHE NORM
November 2009
ICS 21.060.10 Supersedes EN ISO 3506-3:1997
English Version
Mechanical properties of corrosion-resistant stainless steel
fasteners - Part 3: Set screws and similar fasteners not under
tensile stress (ISO 3506-3:2009)
Caractéristiques mécaniques des éléments de fixation en Mechanische Eigenschaften von Verbindungselementen
acier inoxydable résistant à la corrosion - Partie 3: Vis sans aus nichtrostenden Stählen - Teil 3: Gewindestifte und
tête et éléments de fixation similaires non soumis à des ähnliche nicht auf Zug beanspruchte Verbindungselemente
contraintes de traction (ISO 3506-3:2009) (ISO 3506-3:2009)
This European Standard was approved by CEN on 24 October 2009.

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: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3506-3:2009: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------
SIST EN ISO 3506-3:2011
EN ISO 3506-3:2009 (E)
Contents Page
Foreword .3

2

---------------------- Page: 4 ----------------------
SIST EN ISO 3506-3:2011
EN ISO 3506-3:2009 (E)
Foreword
This document (EN ISO 3506-3:2009) has been prepared by Technical Committee ISO/TC 2 "Fasteners" in
collaboration with Technical Committee CEN/TC 185 “Fasteners”, 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 May 2010, and conflicting national standards shall be withdrawn at the
latest by May 2010.
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 3506-3:1997.
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, 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 3506-3:2009 has been approved by CEN as a EN ISO 3506-3:2009 without any modification.

3

---------------------- Page: 5 ----------------------
SIST EN ISO 3506-3:2011

---------------------- Page: 6 ----------------------
SIST EN ISO 3506-3:2011

INTERNATIONAL ISO
STANDARD 3506-3
Second edition
2009-11-15


Mechanical properties of corrosion-
resistant stainless steel fasteners —
Part 3:
Set screws and similar fasteners not
under tensile stress
Caractéristiques mécaniques des éléments de fixation en acier
inoxydable résistant à la corrosion —
Partie 3: Vis sans tête et éléments de fixation similaires non soumis à
des contraintes de traction




Reference number
ISO 3506-3:2009(E)
©
ISO 2009

---------------------- Page: 7 ----------------------
SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


COPYRIGHT PROTECTED DOCUMENT


©  ISO 2009
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 [e-mail]
Web www.iso.org
Published in Switzerland

ii © ISO 2009 – All rights reserved

---------------------- Page: 8 ----------------------
SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Designation, marking and finish.2
3.1 Designation .2
3.2 Marking.3
3.3 Finish .4
4 Chemical composition .4
5 Mechanical properties.5
5.1 General .5
5.2 Proof torque of hexagon socket set screws.5
5.3 Hardness .6
6 Test methods .6
6.1 Proof torque test for hexagon socket set screws.6
6.2 Hardness test HB, HRB or HV for set screws.7
Annex A (normative) Description of the groups and grades of stainless steels .8
Annex B (informative) Austenitic stainless steel composition specifications .11
Annex C (informative) Austenitic stainless steels for cold heading and extruding.13
Annex D (informative) Time-temperature diagram of intergranular corrosion in austenitic
stainless steels, grade A2 (18/8 steels).15
Annex E (informative) Magnetic properties for austenitic stainless steels .16
Bibliography.17

© ISO 2009 – All rights reserved iii

---------------------- Page: 9 ----------------------
SIST EN ISO 3506-3:2011
ISO 3506-3:2009(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 3506-3 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 1, Mechanical
properties of fasteners.
This second edition cancels and replaces the first edition (ISO 3506-3:1997), which has been technically
revised.
ISO 3506 consists of the following parts, under the general title Mechanical properties of corrosion-resistant
stainless steel fasteners:
⎯ Part 1: Bolts, screws and studs
⎯ Part 2: Nuts
⎯ Part 3: Set screws and similar fasteners not under tensile stress
⎯ Part 4: Tapping screws
iv © ISO 2009 – All rights reserved

---------------------- Page: 10 ----------------------
SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E)
Introduction
In the preparation of this part of ISO 3506, special attention has been given to the fundamentally different
property characteristics of the stainless steel fastener grades compared with those of carbon steel and
low-alloy steel fasteners. Austenitic stainless steels are strengthened only by cold working and consequently
the components do not have as homogeneous local material properties as hardened and tempered parts.
These special features have been recognized in the elaboration of the hardness classes and the test
procedures for mechanical properties.


© ISO 2009 – All rights reserved v

---------------------- Page: 11 ----------------------
SIST EN ISO 3506-3:2011

---------------------- Page: 12 ----------------------
SIST EN ISO 3506-3:2011
INTERNATIONAL STANDARD ISO 3506-3:2009(E)

Mechanical properties of corrosion-resistant stainless steel
fasteners —
Part 3:
Set screws and similar fasteners not under tensile stress
1 Scope
This part of ISO 3506 specifies the mechanical properties of set screws and similar fasteners not under tensile
stress made of austenitic stainless steel, when tested over an ambient temperature range of 10 °C to 35 °C.
Properties vary at higher or lower temperatures.
This part of ISO 3506 applies to set screws and similar fasteners:
⎯ with nominal thread diameter 1,6 mm u d u 24 mm;
⎯ of triangular ISO metric threads with diameters and pitches in accordance with ISO 68-1, ISO 261 and
ISO 262;
⎯ of any shape.
It does not apply to screws with special properties, such as weldability.
NOTE The designation system of this part of ISO 3506 can be used for sizes outside the limits given in this clause
(e.g. d > 24 mm), provided that all applicable mechanical and physical requirements of the hardness classes are met.
This part of ISO 3506 does not define corrosion or oxidation resistance in particular environments.
The aim of this part of ISO 3506 is the classification of corrosion-resistant stainless steel fasteners into
hardness classes.
Corrosion and oxidation performances and mechanical properties for use at elevated or sub-zero
temperatures can be agreed on between the user and the manufacturer in each particular case. Annex D
shows how the risk of intergranular corrosion at elevated temperatures depends on the carbon content.
All austenitic stainless steel fasteners are normally non-magnetic in the annealed condition; after cold working,
some magnetic properties can be evident (see Annex E).
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 68-1, ISO general purpose screw threads — Basic profile — Part 1: Metric screw threads
ISO 261, ISO general purpose metric screw threads — General plan
© ISO 2009 – All rights reserved 1

---------------------- Page: 13 ----------------------
SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E)
ISO 262, ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts
ISO 898-5, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 5: Set screws and
similar threaded fasteners not under tensile stresses
ISO 3651-1, Determination of resistance to intergranular corrosion of stainless steels — Part 1: Austenitic and
ferritic-austenitic (duplex) stainless steels — Corrosion test in nitric acid medium by measurement of loss in
mass (Huey test)
ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels — Part 2: Ferritic,
austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing sulfuric acid
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H,
K, N, T)
ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners
ISO 16426, Fasteners — Quality assurance system
3 Designation, marking and finish
3.1 Designation
The designation system for stainless steel grades and hardness classes for set screws and similar fasteners
is given in Figure 1. The designation of the material consists of two blocks, which are separated by a hyphen.
The first block designates the steel grade and the second block, the hardness class.
The designation of the steel grade (first block) consists of the letter A for austenitic steel, which indicates the
group of steel and a digit, which indicates a range of chemical compositions within this steel group (see
Table 2).
The designation of the hardness class (second block) consists of two digits representing 1/10 of the minimum
Vickers hardness and the letter H, referring to hardness (see Table 1).
Table 1 — Designations of hardness classes in relation to Vickers hardness
Hardness class 12H 21H
Vickers hardness, HV min. 125 210
EXAMPLE A1-12H indicates: austenitic steel, soft, minimum hardness 125 HV.
2 © ISO 2009 – All rights reserved

---------------------- Page: 14 ----------------------
SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E)

a
The steel groups and steel grades classified in Figure 1 are described in Annex A and specified by the chemical
composition given in Table 2.
b
Low-carbon austenitic stainless steels with carbon content not exceeding 0,03 % may additionally be marked with
an “L”.
EXAMPLE A4L-21H
c
Set screws and similar fasteners passivated in accordance with ISO 16048 may additionally be marked with a “P”.
EXAMPLE A4-21HP
Figure 1 — Designation system for stainless steel grades and hardness classes for set screws and
similar fasteners
3.2 Marking
3.2.1 General
Marking of set screws and similar fasteners is not mandatory.
When set screws and similar fasteners manufactured to the requirements of this part of ISO 3506 are
designated and marked, they shall be designated in accordance with the designation system described in 3.1
and marked in accordance with 3.2.2 and 3.2.3. However, the designation system described in 3.1 and the
provisions for marking according to 3.2.3 shall be used only if all relevant requirements of this part of
ISO 3506 are met.
3.2.2 Manufacturer's identification mark
A manufacturer's identification mark shall be included during the manufacturing process on all set screws and
similar fasteners which are marked with a hardness class symbol, provided this is possible for technical
reasons. Manufacturer's identification marking is also recommended on set screws and similar fasteners
which are not marked with a hardness class symbol.
3.2.3 Set screws and similar fasteners
When set screws and similar fasteners are marked, they shall be clearly marked in accordance with 3.1. The
marking should include the steel grade and hardness class.
© ISO 2009 – All rights reserved 3

---------------------- Page: 15 ----------------------
SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E
...

SLOVENSKI STANDARD
SIST EN ISO 3506-3:2011
01-junij-2011
1DGRPHãþD
SIST EN ISO 3506-3:2001
SIST ISO 3506-3:2000
0HKDQVNHODVWQRVWLYH]QLKHOHPHQWRYL]QHUMDYQHJDMHNODGHO1DYRMQL]DWLþLLQ
SRGREQLYLMDNLNLQLVRQDWH]QRREUHPHQMHQL,62
Mechanical properties of corrosion-resistant stainless steel fasteners - Part 3: Set screws
and similar fasteners not under tensile stress (ISO 3506-3:2009)
Mechanische Eigenschaften von Verbindungselementen aus nichtrostenden Stählen -
Teil 3: Gewindestifte und ähnliche nicht auf Zug beanspruchte Verbindungselemente
(ISO 3506-3:2009)
Caractéristiques mécaniques des éléments de fixation en acier inoxydable résistant à la
corrosion - Partie 3: Vis sans tête et éléments de fixation similaires non soumis à des
contraintes de traction (ISO 3506-3:2009)
Ta slovenski standard je istoveten z: EN ISO 3506-3:2009
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
SIST EN ISO 3506-3:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO 3506-3:2011

---------------------- Page: 2 ----------------------

SIST EN ISO 3506-3:2011


EUROPEAN STANDARD
EN ISO 3506-3

NORME EUROPÉENNE

EUROPÄISCHE NORM
November 2009
ICS 21.060.10 Supersedes EN ISO 3506-3:1997
English Version
Mechanical properties of corrosion-resistant stainless steel
fasteners - Part 3: Set screws and similar fasteners not under
tensile stress (ISO 3506-3:2009)
Caractéristiques mécaniques des éléments de fixation en Mechanische Eigenschaften von Verbindungselementen
acier inoxydable résistant à la corrosion - Partie 3: Vis sans aus nichtrostenden Stählen - Teil 3: Gewindestifte und
tête et éléments de fixation similaires non soumis à des ähnliche nicht auf Zug beanspruchte Verbindungselemente
contraintes de traction (ISO 3506-3:2009) (ISO 3506-3:2009)
This European Standard was approved by CEN on 24 October 2009.

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: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3506-3:2009: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST EN ISO 3506-3:2011
EN ISO 3506-3:2009 (E)
Contents Page
Foreword .3

2

---------------------- Page: 4 ----------------------

SIST EN ISO 3506-3:2011
EN ISO 3506-3:2009 (E)
Foreword
This document (EN ISO 3506-3:2009) has been prepared by Technical Committee ISO/TC 2 "Fasteners" in
collaboration with Technical Committee CEN/TC 185 “Fasteners”, 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 May 2010, and conflicting national standards shall be withdrawn at the
latest by May 2010.
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 3506-3:1997.
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, 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 3506-3:2009 has been approved by CEN as a EN ISO 3506-3:2009 without any modification.

3

---------------------- Page: 5 ----------------------

SIST EN ISO 3506-3:2011

---------------------- Page: 6 ----------------------

SIST EN ISO 3506-3:2011

INTERNATIONAL ISO
STANDARD 3506-3
Second edition
2009-11-15


Mechanical properties of corrosion-
resistant stainless steel fasteners —
Part 3:
Set screws and similar fasteners not
under tensile stress
Caractéristiques mécaniques des éléments de fixation en acier
inoxydable résistant à la corrosion —
Partie 3: Vis sans tête et éléments de fixation similaires non soumis à
des contraintes de traction




Reference number
ISO 3506-3:2009(E)
©
ISO 2009

---------------------- Page: 7 ----------------------

SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


COPYRIGHT PROTECTED DOCUMENT


©  ISO 2009
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 [e-mail]
Web www.iso.org
Published in Switzerland

ii © ISO 2009 – All rights reserved

---------------------- Page: 8 ----------------------

SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Designation, marking and finish.2
3.1 Designation .2
3.2 Marking.3
3.3 Finish .4
4 Chemical composition .4
5 Mechanical properties.5
5.1 General .5
5.2 Proof torque of hexagon socket set screws.5
5.3 Hardness .6
6 Test methods .6
6.1 Proof torque test for hexagon socket set screws.6
6.2 Hardness test HB, HRB or HV for set screws.7
Annex A (normative) Description of the groups and grades of stainless steels .8
Annex B (informative) Austenitic stainless steel composition specifications .11
Annex C (informative) Austenitic stainless steels for cold heading and extruding.13
Annex D (informative) Time-temperature diagram of intergranular corrosion in austenitic
stainless steels, grade A2 (18/8 steels).15
Annex E (informative) Magnetic properties for austenitic stainless steels .16
Bibliography.17

© ISO 2009 – All rights reserved iii

---------------------- Page: 9 ----------------------

SIST EN ISO 3506-3:2011
ISO 3506-3:2009(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 3506-3 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 1, Mechanical
properties of fasteners.
This second edition cancels and replaces the first edition (ISO 3506-3:1997), which has been technically
revised.
ISO 3506 consists of the following parts, under the general title Mechanical properties of corrosion-resistant
stainless steel fasteners:
⎯ Part 1: Bolts, screws and studs
⎯ Part 2: Nuts
⎯ Part 3: Set screws and similar fasteners not under tensile stress
⎯ Part 4: Tapping screws
iv © ISO 2009 – All rights reserved

---------------------- Page: 10 ----------------------

SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E)
Introduction
In the preparation of this part of ISO 3506, special attention has been given to the fundamentally different
property characteristics of the stainless steel fastener grades compared with those of carbon steel and
low-alloy steel fasteners. Austenitic stainless steels are strengthened only by cold working and consequently
the components do not have as homogeneous local material properties as hardened and tempered parts.
These special features have been recognized in the elaboration of the hardness classes and the test
procedures for mechanical properties.


© ISO 2009 – All rights reserved v

---------------------- Page: 11 ----------------------

SIST EN ISO 3506-3:2011

---------------------- Page: 12 ----------------------

SIST EN ISO 3506-3:2011
INTERNATIONAL STANDARD ISO 3506-3:2009(E)

Mechanical properties of corrosion-resistant stainless steel
fasteners —
Part 3:
Set screws and similar fasteners not under tensile stress
1 Scope
This part of ISO 3506 specifies the mechanical properties of set screws and similar fasteners not under tensile
stress made of austenitic stainless steel, when tested over an ambient temperature range of 10 °C to 35 °C.
Properties vary at higher or lower temperatures.
This part of ISO 3506 applies to set screws and similar fasteners:
⎯ with nominal thread diameter 1,6 mm u d u 24 mm;
⎯ of triangular ISO metric threads with diameters and pitches in accordance with ISO 68-1, ISO 261 and
ISO 262;
⎯ of any shape.
It does not apply to screws with special properties, such as weldability.
NOTE The designation system of this part of ISO 3506 can be used for sizes outside the limits given in this clause
(e.g. d > 24 mm), provided that all applicable mechanical and physical requirements of the hardness classes are met.
This part of ISO 3506 does not define corrosion or oxidation resistance in particular environments.
The aim of this part of ISO 3506 is the classification of corrosion-resistant stainless steel fasteners into
hardness classes.
Corrosion and oxidation performances and mechanical properties for use at elevated or sub-zero
temperatures can be agreed on between the user and the manufacturer in each particular case. Annex D
shows how the risk of intergranular corrosion at elevated temperatures depends on the carbon content.
All austenitic stainless steel fasteners are normally non-magnetic in the annealed condition; after cold working,
some magnetic properties can be evident (see Annex E).
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 68-1, ISO general purpose screw threads — Basic profile — Part 1: Metric screw threads
ISO 261, ISO general purpose metric screw threads — General plan
© ISO 2009 – All rights reserved 1

---------------------- Page: 13 ----------------------

SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E)
ISO 262, ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts
ISO 898-5, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 5: Set screws and
similar threaded fasteners not under tensile stresses
ISO 3651-1, Determination of resistance to intergranular corrosion of stainless steels — Part 1: Austenitic and
ferritic-austenitic (duplex) stainless steels — Corrosion test in nitric acid medium by measurement of loss in
mass (Huey test)
ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels — Part 2: Ferritic,
austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing sulfuric acid
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H,
K, N, T)
ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners
ISO 16426, Fasteners — Quality assurance system
3 Designation, marking and finish
3.1 Designation
The designation system for stainless steel grades and hardness classes for set screws and similar fasteners
is given in Figure 1. The designation of the material consists of two blocks, which are separated by a hyphen.
The first block designates the steel grade and the second block, the hardness class.
The designation of the steel grade (first block) consists of the letter A for austenitic steel, which indicates the
group of steel and a digit, which indicates a range of chemical compositions within this steel group (see
Table 2).
The designation of the hardness class (second block) consists of two digits representing 1/10 of the minimum
Vickers hardness and the letter H, referring to hardness (see Table 1).
Table 1 — Designations of hardness classes in relation to Vickers hardness
Hardness class 12H 21H
Vickers hardness, HV min. 125 210
EXAMPLE A1-12H indicates: austenitic steel, soft, minimum hardness 125 HV.
2 © ISO 2009 – All rights reserved

---------------------- Page: 14 ----------------------

SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E)

a
The steel groups and steel grades classified in Figure 1 are described in Annex A and specified by the chemical
composition given in Table 2.
b
Low-carbon austenitic stainless steels with carbon content not exceeding 0,03 % may additionally be marked with
an “L”.
EXAMPLE A4L-21H
c
Set screws and similar fasteners passivated in accordance with ISO 16048 may additionally be marked with a “P”.
EXAMPLE A4-21HP
Figure 1 — Designation system for stainless steel grades and hardness classes for set screws and
similar fasteners
3.2 Marking
3.2.1 General
Marking of set screws and similar fasteners is not mandatory.
When set screws and similar fasteners manufactured to the requirements of this part of ISO 3506 are
designated and marked, they shall be designated in accordance with the designation system described in 3.1
and marked in accordance with 3.2.2 and 3.2.3. However, the designation system described in 3.1 and the
provisions for marking according to 3.2.3 shall be used only if all relevant requirements of this part of
ISO 3506 are met.
3.2.2 Manufacturer's identification mark
A manufacturer's identification mark shall be included during the manufacturing process on all set screws and
similar fasteners which are marked with a hardness class symbol, provided this is possible for technical
reasons. Manufacturer's identification marking is also recommended on set screws and similar fasteners
which are not marked with a hardness class symbol.
3.2.3 Set screws and similar fasteners
When set screws and similar fasteners are marked, they shall be clearly marked in accordance with 3.1. The
marking should include the steel grade and hardness class.
© ISO 2009 – All rights reserved 3

---------------------- Page: 15 ----------------------

SIST EN ISO 3506-3:2011
ISO 3506-3:2009(E)
3.2.4 Packages
All pa
...