FprEN ISO 683-17

SLOVENSKI STANDARD
oSIST prEN ISO 683-17:2022
01-junij-2022
Toplotno obdelana jekla, legirana in avtomatna jekla - 17. del: Jekla za kroglične in
valjčne ležaje (ISO/DIS 683-17:2022)
Heat-treated steels, alloy steels and free-cutting steels - Part 17: Ball and roller bearing
steels (ISO/DIS 683-17:2022)
Für eine Wärmebehandlung bestimmte Stähle, legierte Stähle und Automatenstähle -
Teil 17: Wälzlagerstähle (ISO/DIS 683-17:2022)
Aciers pour traitement thermique, aciers alliés et aciers pour décolletage - Partie 17:
Aciers pour roulements (ISO/DIS 683-17:2022)
Ta slovenski standard je istoveten z: prEN ISO 683-17
ICS:
21.100.20 Kotalni ležaji Rolling bearings
77.140.10 Jekla za toplotno obdelavo Heat-treatable steels
77.140.20 Visokokakovostna jekla Stainless steels
oSIST prEN ISO 683-17:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 683-17:2022

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oSIST prEN ISO 683-17:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 683-17
ISO/TC 17/SC 4 Secretariat: DIN
Voting begins on: Voting terminates on:
2022-04-26 2022-07-19
Heat-treatable steels, alloy steels and free-cutting steels —
Part 17:
Ball and roller bearing steels
Partie 17: Aciers pour roulements
ICS: 21.100.20; 77.140.10
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 683-17:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022

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oSIST prEN ISO 683-17:2022
ISO/DIS 683-17:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
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
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oSIST prEN ISO 683-17:2022
ISO/DIS 683-17:2022(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification and designation . 2
4.1 Classification . 2
4.2 Designation . 2
5 Information to be supplied by the purchaser . 2
5.1 Mandatory information . 2
5.2 Options/Supplementary or special requirements . 3
6 Manufacturing process . 3
6.1 General . 3
6.2 Deoxidation, vacuum degassing and hydrogen removal . 3
6.3 Heat treatment and surface condition at delivery . 3
6.3.1 Heat-treatment condition . 3
6.3.2 Particular surface conditions . 4
6.3.3 Traceability of the cast . 4
7 Requirements . 4
7.1 General . 4
7.2 Chemical composition . 4
7.3 Hardenability . 4
7.4 Hardness . 4
7.5 Microstructure . 4
7.5.1 Austenitic grain size of case-hardening and induction-hardening bearing
steels . 4
7.5.2 Spheroidization and distribution of carbides . 4
7.5.3 Structure of case-hardening steels in the condition +FP . 5
7.6 Non-metallic inclusions . 5
7.6.1 Microscopic inclusions . 5
7.6.2 Macroscopic inclusions . 5
7.7 Internal soundness . 5
7.8 Surface quality . 5
7.9 Shape, dimensions and tolerances . 5
8 Inspection . 6
8.1 Testing procedures and types of inspection documents . 6
8.2 Frequency of testing . 6
8.3 Specific inspection and testing . 6
8.3.1 Verification of the hardenability and hardness . 6
8.3.2 Inspection of the surface quality . 6
8.3.3 Dimensional inspection. 6
9 Test methods . 6
9.1 Chemical analysis . 6
9.2 Hardness and hardenability tests . 7
9.2.1 Hardness . 7
9.2.2 Verification of hardenability . 7
9.2.3 Retests . 7
10 Marking . . 7
Annex A (normative) Supplementary or special requirements .21
Annex B (informative) Designations of the steels given in Tables 3, 5 and 6 and of
comparable grades covered in various designation systems .24
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oSIST prEN ISO 683-17:2022
ISO/DIS 683-17:2022(E)
Bibliography .26
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oSIST prEN ISO 683-17:2022
ISO/DIS 683-17:2022(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 www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee [or Project Committee] ISO/TC 17, Steel,
Subcommittee SC 4, Heat treatable and alloy steels.
This forth edition cancels and replaces the third edition (ISO 683-17:2014), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Requirements for Ca and Ti content have been added for through-hardening bearing steels;
— Requirements for O content have been added for through-hardening and induction-hardening
bearing steels;
— Option for H content for premium bearing steels has been added for through-hardening, case-
hardening and induction-hardening bearing steels;
— Option for verification of microscopic inclusions in Table A.1 for through-hardening bearing steels
has been revised.
A list of all parts in the ISO 683 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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oSIST prEN ISO 683-17:2022

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oSIST prEN ISO 683-17:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 683-17:2022(E)
Heat-treatable steels, alloy steels and free-cutting steels —
Part 17:
Ball and roller bearing steels
1 Scope
This part of ISO 683 specifies the technical delivery requirements for five groups of wrought ball and
roller bearing steels as listed in Table 3, namely
— through-hardening bearing steels (steels with about 1 % C and 1 % to 2 % Cr),
— case-hardening bearing steels,
— induction-hardening bearing steels (unalloyed and alloyed),
— stainless bearing steels, and
— high-temperature bearing steels.
This part of ISO 683 applies to the products and heat-treatment conditions given in Table 1 and the
surface conditions given in Table 2.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical
testing
ISO 404, Steel and steel products — General technical delivery requirements
ISO 642, Steel — Hardenability test by end quenching (Jominy test)
ISO 643, Steels — Micrographic determination of the apparent grain size
ISO 3763, Wrought steels — Macroscopic methods for assessing the content of non-metallic inclusions
ISO 3887, Steels — Determination of the depth of decarburization
ISO 4948-1, Steels — Classification — Part 1: Classification of steels into unalloyed and alloy steels based
on chemical composition
ISO 4948-2, Steels — Classification — Part 2: Classification of unalloyed and alloy steels according to main
quality classes and main property or application characteristics
ISO/TS 4949, Steel names based on letter symbols
ISO 4967, Steel — Determination of content of non-metallic inclusions — Micrographic method using
standard diagrams
ISO 4969, Steel — Etching method for macroscopic examination
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oSIST prEN ISO 683-17:2022
ISO/DIS 683-17:2022(E)
ISO 5949, Tool steels and bearing steels — Micrographic method for assessing the distribution of carbides
using reference photomicrographs
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method
ISO 6929, Steel products — Vocabulary
ISO 9443, Surface quality classes for hot-rolled bars and wire rod
ISO/TR 9769, Steel and iron — Review of available methods of analysis
ISO 10474, Steel and steel products — Inspection documents
ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical
composition
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6929 and the following apply.
3.1
ball and roller bearing steels
steels for rings and/or rolling bodies which use balls and rollers to maintain the separation between
the moving parts of the bearing
4 Classification and designation
4.1 Classification
The classification of the relevant steel grades is allocated in accordance with ISO 4948-1 and ISO 4948-2.
All steel grades covered by this part of ISO 683 are special steels.
4.2 Designation
For the steel grades covered by this part of ISO 683, the steel names given in the relevant tables are
allocated in accordance with ISO/TS 4949.
5 Information to be supplied by the purchaser
5.1 Mandatory information
The manufacturer shall obtain the following information from the purchaser at the time of enquiry and
order:
a) the quantity to be delivered;
b) the designation of the products form (billets, bars, rod, wire, tubes, rings, discs, etc.);
c) either the reference to the dimensional standard and the dimensions and tolerances selected
from it (see 7.6) or the designation of any other document covering the dimensions and tolerances
required for the product;
d) a reference to this part of ISO 683, i. e. ISO 683-17;
e) the designation of the steel grade (see Table 3);
f) the symbol for the heat-treatment condition on delivery (see 6.3.1 and Table 1);
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oSIST prEN ISO 683-17:2022
ISO/DIS 683-17:2022(E)
g) usually designation for an inspection certificate 3.1 or, if required, an inspection certificate 3.2 in
accordance with ISO 10474.
5.2 Options/Supplementary or special requirements
A number of options are specified in this part of ISO 683 and listed below. If the purchaser does not
indicate the wish to implement any of theses options, the products will be supplied in accordance with
the basic specifications of this part of ISO 683 (see 5.1).
a) If another surface condition than 'hot-worked' or a special surface quality is required, the surface
condition (see Table 2), and the surface quality (see 7.5).
b) Any requirement concerning the hardenability (+H) (see 7.1.3 and Table 5) and the verification of
hardenability and if agreed the information about calculation of the hardenability (see 9.2.2).
c) Any supplementary requirement that shall be complied with, the symbol and, where necessary, the
details of this supplementary requirement (see Annex A).
EXAMPLE 50 hot-rolled round bars according to ISO 1035-1 with nominal diameter of 50,0 mm, nominal
length of 8 000 mm and with tolerance class S on diameter of ± 0,40 mm and tolerance class L2 on length of
+100/0 mm in accordance with ISO 1035-4 and with hot-worked surface made of steel grade ISO 683-17, 100Cr6
(see Table 3) in annealed condition to achieve spheroidized carbides (+AC), with an inspection certificate 3.1 in
accordance with ISO 10474:
50 round bars ISO 1035-1/-4 – 50,0 S × 8 000 L2
steel grade ISO 683-17 - 100Cr6+AC
inspection certificate ISO 10474 - 3.1
6 Manufacturing process
6.1 General
With the restrictions given by the requirements in 6.2 and 6.3 the manufacturing process of the steel
and of the products is left to the discretions of the manufacturer.
If requested, the purchaser shall be informed about the steel making process used.
Remelting of the steel may be agreed upon at the time of enquiry and order.
6.2 Deoxidation, vacuum degassing and hydrogen removal
All steels shall be deoxidized.
Vacuum degassing and hydrogen removal treatment for premium applications is at the discretion of the
manufacturer.
6.3 Heat treatment and surface condition at delivery
6.3.1 Heat-treatment condition
The products shall be delivered in one of the heat-treatment conditions given in Table 1, lines 2 to 10, as
agreed at the time of enquiry and order. If there is no agreement, the products shall be delivered in the
untreated condition.
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oSIST prEN ISO 683-17:2022
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6.3.2 Particular surface conditions
If agreed upon at the time of enquiry and order, the products shall be delivered in one of the particular
surface conditions given in Table 2, lines 3 to 9.
6.3.3 Traceability of the cast
Each product shall be traceable to the cast, see Clause 10.
7 Requirements
7.1 General
Table 1 gives a survey of combinations of usual heat-treatment conditions at delivery, product forms
and requirements according to Tables 3 to 6 (chemical composition, hardenability, maximum hardness,
hardness range).
In addition to this part of ISO 683, the general technical delivery requirements of ISO 404 are applicable.
7.2 Chemical composition
The chemical composition determined by cast analysis shall comply with the values in Table 3.
Permissible deviations between the limiting values for cast analysis and the values for product analysis
are given in Table 4.
The product analysis shall be carried out when specified at the time of the enquiry and order (see 9.1
and A.2).
7.3 Hardenability
Where the steel is not ordered according to hardenability requirements, i.e. where the steel type
designations of Table 3 and not the designations given in Table 5 are applied, the requirements for
hardness specified in Table 6 (see also Table 1, column 9) apply, as appropriate, for the particular heat-
treatment condition. In this case, the values of hardenability given in Table 5 are for guidance purposes
only.
Where the steel is ordered to hardenability requirements by using the designations given in Table 5 the
values of hardenability given in Table 5 apply in addition to the requirements cited in Table 1, column 9
(see footnote b to Table 3).
7.4 Hardness
The hardness in the usual conditions of delivery is given in Table 6.
7.5 Microstructure
7.5.1 Austenitic grain size of case-hardening and induction-hardening bearing steels
Case-hardening steels and induction-hardening steels shall have a fine grain size of 5 or finer
(see ISO 643). For verification of the grain size, see A.3.
7.5.2 Spheroidization and distribution of carbides
7.5.2.1 For deliveries in treatment conditions +AC and +AC+C, the carbides of the through-hardening
steels shall be spheroidized and the carbides of the stainless and high-temperature bearing steels
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oSIST prEN ISO 683-17:2022
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shall be predominantly spheroidized. Case-hardening steels may show remnants of incompletely
spheroidized carbides. For the degree of spheroidization see A.4.
7.5.2.2 For distribution of carbides, see A.5.
7.5.3 Structure of case-hardening steels in the condition +FP
The structure shall consist of ferrite-pearlite. Bainite contents up to 10 % are, however, permissible.
7.6 Non-metallic inclusions
7.6.1 Microscopic inclusions
The characterization of non-metallic inclusions is critically important to the fatigue life of bearings.
Therefore all bearing steels shall have a certain degree of cleanliness. The requirements for the content
of non-metallic inclusions apply in every case; however, verification requires a special agreement, see
A.6.
7.6.2 Macroscopic inclusions
If verification is agreed then the method and acceptance limits shall be agreed at the time of enquiry
and order.
7.7 Internal soundness
Where appropriate, requirements relating to the internal soundness of the products shall be agreed at
the time of enquiry and order, see A.7.
7.8 Surface quality
7.8.1 All products shall have a smooth surface finish appropriate to the manufacturing process
applied.
7.8.2 Ground or peeled/turned or machined products shall be free from surface discontinuities
detrimental to practical use and surface decarburization.
7.8.3 If hot-rolled, forged, cold-reduced or rough-machined products are ordered for peeling or
grinding to avoid
a) surface decarburization, and
b) surface defects
the machining allowances shall be agreed upon at the time of enquiry and order.
Alternatively, for round bars and rod, the permissible depth of surface discontinuities may be specified
in accordance with ISO 9443.
7.9 Shape, dimensions and tolerances
The shape, dimensions and tolerances of the products shall comply with the requirements agreed upon
at the time of enquiry and order. The agreements shall, as far as possible, be based on corresponding
International Standards (see bibliography) or, otherwise, on suitable national standards.
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oSIST prEN ISO 683-17:2022
ISO/DIS 683-17:2022(E)
8 Inspection
8.1 Testing procedures and types of inspection documents
8.1.1 Products complying with this part of ISO 683 shall be ordered and delivered with inspection
certificate 3.1 or 3.2 as specified in ISO 10474. The type of document shall be agreed upon at the time of
enquiry and order. If the order does not contain any specification of this type, an inspection certificate
3.1 shall be issued.
8.1.2 The specific inspections and tests described in 8.2 and 8.3 shall be carried out and the results
shall be confirmed in the inspection certificate.
In addition the inspection certificate report shall cover:
a) confirmation that the material complies with the requirements of the order;
b) results of the cast analysis for all elements specified in Table 3 for the steel grade concerned;
c) the results of all inspections and tests ordered by supplementary requirements (see Annex A);
d) the symbol letters or numbers connecting the inspection document with the relevant test unit.
8.2 Frequency of testing
The amount of testing, the sampling conditions and the test methods to be applied for the verification of
the requirements shall be in accordance with the prescriptions in Table 7.
8.3 Specific inspection and testing
8.3.1 Verification of the hardenability and hardness
The hardness requirements given for the relevant heat-treatment condition in Table 6 (see also Table 1,
column 9, sub-column 9.2) shall be verified.
For steels ordered with the symbol +H in the designation (see Table 5), in addition, the hardenability
requirements according to Table 5 shall be verified.
8.3.2 Inspection of the surface quality
Unless otherwise agreed at the time of enquiry and order (see A.8), the extend of testing and the test
method is left to the discretion of the manufacturer.
8.3.3 Dimensional inspection
Unless otherwise agreed at the time of enquiry and order (see A.9), the number of products to be
inspected for their shape and dimensions shall be left to the discretion of the manufacturer.
9 Test methods
9.1 Chemical analysis
The choice of a suitable physical or chemical analytical method for the analysis shall be at the discretion
of the manufacturer. In cases of dispute, the method for product analysis used shall be agreed, taking
into account the relevant existing International Standards.
NOTE The list of available International Standards on chemical analysis is given in
...