SIST EN ISO 3506-4:2025
(Main)Fasteners - Mechanical properties of corrosion-resistant stainless steel fasteners - Part 4: Tapping screws with specified grades and hardness classes (ISO 3506-4:2025)
Fasteners - Mechanical properties of corrosion-resistant stainless steel fasteners - Part 4: Tapping screws with specified grades and hardness classes (ISO 3506-4:2025)
ISO 3506-4:2009 specifies the mechanical properties of tapping screws made of austenitic, martensitic and ferritic steel grades of corrosion-resistant stainless steels, when tested over an ambient temperature range of 10 °C to 35 °C. Properties vary at higher or lower temperatures.
It applies to tapping screws with threads from ST2,2 up to and including ST8, in accordance with ISO 1478.
It does not apply to screws with special properties such as weldability.
Mechanische Verbindungselemente - Mechanische Eigenschaften von Verbindungselementen aus nichtrostenden Stählen - Teil 4: Blechschrauben mit festgelegten Stahlsorten und Härteklassen (ISO 3506-4:2025)
Dieses Dokument legt die mechanischen und physikalischen Eigenschaften von Blechschrauben aus nichtrostenden, korrosionsbeständigen austenitischen, martensitischen, ferritischen Stählen und Duplex-Stählen mit festgelegten Stahlsorten und Härteklassen fest.
WARNUNG — Blechschrauben, die den Anforderungen dieses Dokuments entsprechen, werden in einem Ugebungstemperaturbereich von 10 °C bis 35 °C geprüft und in einem Anwendungsbereich von −20 °C bis +150 °C eingesetzt. Eventuell ändern sich die festgelegten mechanischen und physikalischen Eigenschaften bei niedrigeren und/oder höheren Temperaturen. Es liegt daher in der Verantwortung des Anwenders, auf der Grundlage der Betriebsumgebungsbedingungen der Baugruppe die geeignete Auswahl zu treffen (siehe auch Abschnitt 5 und Abschnitt 6).
Dieses Dokument gilt für Blechschrauben mit Gewinden ST2,2 bis ST8, nach ISO 1478.
Dieses Dokument gilt nicht für Blechschrauben mit besonderen Eigenschaften, wie z. B. die Schweißbarkeit.
Fixations - Caractéristiques mécaniques des fixations en acier inoxydable résistant à la corrosion - Partie 4: Vis à tôle de grades et classes de dureté spécifiées (ISO 3506-4:2025)
L'ISO 3506-4:2009 spécifie les caractéristiques mécaniques des vis à tôle constituées d'aciers inoxydables austénitiques, martensitiques et ferritiques résistant à la corrosion lorsqu'elles sont soumises 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 3506-4:2009 s'applique aux vis à tôle ayant un filetage compris entre ST2,2 et ST8 inclus, conformément à l'ISO 1478.
L'ISO 3506-4:2009 ne s'applique pas aux vis possédant des caractéristiques spéciales telles que la soudabilité.
Vezni elementi - Mehanske lastnosti veznih elementov iz korozijsko odpornega nerjavnega jekla - 4. del: Pločevinski vijaki z določenimi razredi in razredi trdnosti (ISO 3506-4:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2025
Vezni elementi - Mehanske lastnosti veznih elementov iz korozijsko odpornega
nerjavnega jekla - 4. del: Pločevinski vijaki z določenimi razredi in razredi trdnosti
(ISO 3506-4:2025)
Fasteners - Mechanical properties of corrosion-resistant stainless steel fasteners - Part
4: Tapping screws with specified grades and hardness classes (ISO 3506-4:2025)
Mechanische Verbindungselemente - Mechanische Eigenschaften von
Verbindungselementen aus nichtrostenden Stählen - Teil 4: Blechschrauben mit
festgelegten Stahlsorten und Härteklassen (ISO 3506-4:2025)
Fixations - Caractéristiques mécaniques des fixations en acier inoxydable résistant à la
corrosion - Partie 4: Vis à tôle de grades et classes de dureté spécifiées (ISO 3506-
4:2025)
Ta slovenski standard je istoveten z: EN ISO 3506-4:2025
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
77.140.20 Visokokakovostna jekla Stainless steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 3506-4
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2025
EUROPÄISCHE NORM
ICS 21.060.10 Supersedes EN ISO 3506-4:2009
English Version
Fasteners - Mechanical properties of corrosion-resistant
stainless steel fasteners - Part 4: Tapping screws with
specified grades and hardness classes (ISO 3506-4:2025)
Fixations - Caractéristiques mécaniques des fixations Mechanische Verbindungselemente - Mechanische
en acier inoxydable résistant à la corrosion - Partie 4: Eigenschaften von Verbindungselementen aus
Vis à tôle de grades et classes de dureté spécifiées (ISO nichtrostenden Stählen - Teil 4: Blechschrauben mit
3506-4:2025) festgelegten Stahlsorten und Härteklassen (ISO 3506-
4:2025)
This European Standard was approved by CEN on 19 January 2025.
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, Türkiye 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3506-4:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 3506-4:2025) 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
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 July 2025, and conflicting national standards shall be
withdrawn at the latest by July 2025.
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 3506-4:2009.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. 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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 3506-4:2025 has been approved by CEN as EN ISO 3506-4:2025 without any
modification.
International
Standard
ISO 3506-4
Third edition
Fasteners — Mechanical properties
2025-01
of corrosion-resistant stainless steel
fasteners —
Part 4:
Tapping screws with specified
grades and hardness classes
Fixations — Caractéristiques mécaniques des fixations en acier
inoxydable résistant à la corrosion —
Partie 4: Vis à tôle de grades et classes de dureté spécifiés
Reference number
ISO 3506-4:2025(en) © ISO 2025
ISO 3506-4:2025(en)
© ISO 2025
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
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Published in Switzerland
ii
ISO 3506-4:2025(en)
Contents Page
Foreword .iv
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Designation system for stainless steel grades and hardness classes . 2
4.1 General .2
4.2 Designation of stainless steel grades (first block) .4
4.3 Designation of hardness classes (second block) .4
5 Materials . 4
5.1 Chemical composition .4
5.2 Heat treatment for martensitic stainless steel tapping screws .5
5.3 Surface condition (finish and/or coating) .5
5.4 Corrosion resistance .6
5.5 Magnetic properties .6
6 Requirements for mechanical, physical and functional properties . 6
6.1 General .6
6.2 Surface hardness for martensitic grades .6
6.3 Core hardness .7
6.4 Thread forming ability .7
6.5 Torsional strength .7
7 Inspection . 8
7.1 Manufacturer’s inspection .8
7.2 Supplier’s inspection .8
7.3 Purchaser’s inspection .8
7.4 Delivery of test results .8
8 Test methods . 8
8.1 General .8
8.2 Hardness test .9
8.2.1 General .9
8.2.2 Surface hardness test .9
8.2.3 Core hardness test .9
8.2.4 Test results and requirements .9
8.3 Drive test .10
8.4 Torsional test.10
9 Marking and labelling .11
9.1 General .11
9.2 Marking on the tapping screws . 12
9.3 Labelling of the packages .
...
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