EN ISO 3506-6:2022

SLOVENSKI STANDARD
01-september-2022
Vezni elementi - Mehanske lastnosti korozijsko odpornih nerjavnih jekel - 6. del:
Splošna pravila za izbiro nerjavnih jekel in nikljevih zlitin za pritrdilne elemente
(ISO 3506-6:2020)
Fasteners - Mechanical properties of corrosion-resistant stainless steel fasteners - Part
6: General rules for the selection of stainless steels and nickel alloys for fasteners (ISO
3506-6:2020)
Verbindungselemente - Mechanische Eigenschaften von Verbindungselementen aus
nichtrostendem Stahl - Teil 6: Allgemeine Regeln für die Auswahl von nichtrostenden
Stählen und Nickellegierungen für Verbindungselemente (ISO 3506-6:2020)
Fixations - Caractéristiques mécaniques des fixations en acier inoxydable résistant à la
corrosion - Partie 6: Règles générales pour la sélection des aciers inoxydables et des
alliages de nickel pour les fixations (ISO 3506-6:2020)
Ta slovenski standard je istoveten z: EN ISO 3506-6:2022
ICS:
21.060.01 Vezni elementi na splošno Fasteners in general
77.120.40 Nikelj, krom in njune zlitine Nickel, chromium and their
alloys
77.140.20 Visokokakovostna jekla Stainless steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3506-6
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2022
EUROPÄISCHE NORM
ICS 21.060.01
English Version
Fasteners - Mechanical properties of corrosion-resistant
stainless steel fasteners - Part 6: General rules for the
selection of stainless steels and nickel alloys for fasteners
(ISO 3506-6:2020)
Fixations - Caractéristiques mécaniques des fixations Verbindungselemente - Mechanische Eigenschaften
en acier inoxydable résistant à la corrosion - Partie 6: von Verbindungselementen aus nichtrostendem Stahl -
Règles générales pour la sélection des aciers Teil 6: Allgemeine Regeln für die Auswahl von
inoxydables et des alliages de nickel pour les fixations nichtrostenden Stählen und Nickellegierungen für
(ISO 3506-6:2020) Verbindungselemente (ISO 3506-6:2020)
This European Standard was approved by CEN on 20 June 2022.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3506-6:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 3506-6:2020 has been prepared by Technical Committee ISO/TC 2 "Fasteners” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 3506-6:2022 by
Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by BSI.
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 December 2022, and conflicting national standards
shall be withdrawn at the latest by December 2022.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 3506-6:2020 has been approved by CEN as EN ISO 3506-6:2022 without any
modification.
INTERNATIONAL ISO
STANDARD 3506-6
First edition
2020-04
Fasteners — Mechanical properties
of corrosion-resistant stainless steel
fasteners —
Part 6:
General rules for the selection of
stainless steels and nickel alloys for
fasteners
Fixations — Caractéristiques mécaniques des fixations en acier
inoxydable résistant à la corrosion —
Partie 6: Règles générales pour la sélection des aciers inoxydables et
des alliages de nickel pour les fixations
Reference number
ISO 3506-6:2020(E)
©
ISO 2020
ISO 3506-6:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 3506-6:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Groups and grades of stainless steels . 2
4.1 General . 2
4.2 Stainless steel group A (austenitic structure) . 2
4.2.1 General. 2
4.2.2 Grade A1 . 3
4.2.3 Grade A2 . 3
4.2.4 Grade A3 . 3
4.2.5 Grade A4 . 3
4.2.6 Grade A5 . 3
4.2.7 Grade A8 . 3
4.3 Stainless steel group C (martensitic structure) . 4
4.3.1 General. 4
4.3.2 Grade C1 . 4
4.3.3 Grade C3 . 4
4.3.4 Grade C4 . 4
4.4 Stainless steel group F (ferritic structure) — Grade F1 . 4
4.5 Stainless steel group D (austenitic-ferritic structure) . 4
4.5.1 General. 4
4.5.2 Grades D2 and D4. 5
4.5.3 Grades D6 and D8. 5
4.6 Stainless steels and nickel alloys for elevated and high temperatures . 5
5 Chemical composition specifications for stainless steels and nickel alloys .5
6 Resistance to stress corrosion cracking . 8
7 Resistance to pitting and crevice corrosion . 9
8 Resistance to intergranular corrosion . 9
9 Susceptibility to formation of intermetallic compounds .11
10 Magnetic permeability properties of stainless steels .12
Annex A (informative) Common designations of stainless steels and nickel alloys used for
fasteners .13
Bibliography .20
ISO 3506-6:2020(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
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