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SLOVENSKI STANDARD
01-december-2022
Nadomešča:
SIST EN ISO 898-2:2012
Vezni elementi - Mehanske lastnosti veznih elementov, narejenih iz ogljikovega
jekla in jeklene zlitine - 2. del: Matice z določenimi razredi trdnosti (ISO 898-2:2022)
Fasteners - Mechanical properties of fasteners made of carbon steel and alloy steel -
Part 2: Nuts with specified property classes (ISO 898-2:2022)
Mechanische Verbindungselemente - Mechanische Eigenschaften von
Verbindungselementen aus Kohlenstoffstahl und legiertem Stahl - Teil 2: Muttern mit
festgelegten Festigkeitsklassen (ISO 898-2:2022)
Fixations - Caractéristiques mécaniques des fixations en acier au carbone et en acier
allié - Partie 2: Écrous de classes de qualité spécifiées (ISO 898-2:2022)
Ta slovenski standard je istoveten z: EN ISO 898-2:2022
ICS:
21.060.20 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 898-2
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 21.060.20 Supersedes EN ISO 898-2:2012
English Version
Fasteners - Mechanical properties of fasteners made of
carbon steel and alloy steel - Part 2: Nuts with specified
property classes (ISO 898-2:2022)
Fixations - Caractéristiques mécaniques des fixations Mechanische Verbindungselemente - Mechanische
en acier au carbone et en acier allié - Partie 2: Écrous Eigenschaften von Verbindungselementen aus
de classes de qualité spécifiées (ISO 898-2:2022) Kohlenstoffstahl und legiertem Stahl - Teil 2: Muttern
mit festgelegten Festigkeitsklassen (ISO 898-2:2022)
This European Standard was approved by CEN on 9 September 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, 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 898-2:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 898-2:2022) 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 April 2023, and conflicting national standards shall be
withdrawn at the latest by April 2023.
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 898-2:2012.
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 898-2:2022 has been approved by CEN as EN ISO 898-2:2022 without any modification.
INTERNATIONAL ISO
STANDARD 898-2
Fourth edition
2022-09
Fasteners — Mechanical properties
of fasteners made of carbon steel and
alloy steel —
Part 2:
Nuts with specified property classes
Fixations — Caractéristiques mécaniques des fixations en acier au
carbone et en acier allié —
Partie 2: Écrous de classes de qualité spécifiées
Reference number
ISO 898-2:2022(E)
ISO 898-2:2022(E)
© ISO 2022
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
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Phone: +41 22 749 01 11
Email: [email protected]
Website: www.iso.org
Published in Switzerland
ii
ISO 898-2:2022(E)
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Symbols . 2
5 Designation systems .3
5.1 Nut styles . 3
5.2 Property classes . 3
5.2.1 Regular nuts (style 1) and high nuts (style 2) . 3
5.2.2 Thin nuts (style 0) . 4
6 Design of bolt and nut assemblies . 4
7 Material, heat treatment, chemical composition and steel microstructure .4
7.1 General . 4
7.2 Heat treatment. 5
7.3 Chemical composition . 5
7.4 Steel microstructure . 7
7.4.1 Non-quenched and tempered nuts . 7
7.4.2 Quenched and tempered nuts . 7
8 Mechanical and physical properties . 7
8.1 General . 7
8.2 Proof load . 8
8.3 Hardness . 9
8.4 Surface integrity . 11
9 Inspection .11
9.1 Manufacturer's inspection . 11
9.2 Supplier's inspection . 11
9.3 Purchaser's inspection . 11
9.4 Delivery of test results . 12
10 Test methods .12
10.1 Proof load test .12
10.1.1 General .12
10.1.2 Applicability .12
10.1.3 Apparatus . 12
10.1.4 Testing device .12
10.1.5 Test procedure. 13
10.1.6 Test results and requirements . 14
10.2 Hardness tests . 14
10.2.1 General . 14
10.2.2 Applicability . 14
10.2.3 Test methods . 14
10.2.4 Test procedures for routine inspection . 14
...