Heat-treated steels, alloy steels and free-cutting steels - Part 17: Ball and roller bearing steels (ISO 683-17:2014)

ISO 683-17:2014 specifies the technical delivery requirements for five groups of wrought ball and roller bearing steels: 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.

Für eine Wärmebehandlung bestimmte Stähle, legierte Stähle und Automatenstähle - Teil 17: Wälzlagerstähle (ISO 683-17:2014)

1.1   Dieser Teil von ISO 683 enthält die technischen Lieferbedingungen für fünf Gruppen von Wälzlager-stählen, wie in Tabelle 3 aufgeführt, nämlich
durchhärtende Wälzlagerstähle (Stähle mit ungefähr 1 % C und 1 % bis 2 % Cr),
einsatzhärtende Wälzlagerstähle,
induktionshärtende Wälzlagerstähle (unlegiert und legiert),
nichtrostende Wälzlagerstähle,
warmharte Wälzlagerstähle.
1.2   Dieser Teil von ISO 683 gilt für die in Tabelle 1 angegebenen Erzeugnisse und Wärmebehandlungs-zustände und die Oberflächenzustände nach Tabelle 2.
1.3   Zusätzlich zu diesem Teil von ISO 683 gelten die allgemeinen technischen Lieferbedingungen nach ISO 404.

Aciers pour traitement thermique, aciers alliés et aciers pour décolletage - Partie 17: Aciers pour roulements (ISO 683-17:2014, Version corrigée 2015-01-15)

l'ISO 683-17:2014 spécifie les prescriptions techniques de livraison pour les cinq groupes d'aciers pour roulements: aciers pour roulements trempés à c?ur (aciers contenant environ 1 % de C et 1 % à 2 % de Cr); aciers de cémentation pour roulements; aciers pour trempe par induction (non alliés et alliés) pour roulements; aciers inoxydables pour roulements; et aciers pour roulements résistant à chaud.

Toplotno obdelana jekla, legirana in avtomatna jekla - 17. del: Jekla za kroglične in valjčne ležaje (ISO 683-17:2014)

1.1 Ta del standarda ISO 683 določa tehnične dobavne pogoje za pet skupin gnetnih krogličnih
in valjčnih ležajev, kot je navedeno v preglednici 3, in sicer:
– prekaljeni ležaji (jekla s približno 1 % C in 1 % do 2 % Cr),
– cemetacijsko kaljeni ležaji,
– indukcijsko kaljeni ležaji (nelegirani in legirani),
– nerjavni ležaji in
– visokotemperaturni ležaji.
1.2 Ta del standarda ISO 683 se uporablja za izdelke in pogoje toplotne obdelave, ki so podani v preglednici 1, in
površinske pogoje, ki so podani v preglednici 2.
1.3 Poleg tega dela standarda ISO 683 se uporabljajo tudi zahteve splošnih dobavnih pogojev standarda ISO 404.

General Information

Status
Published
Publication Date
28-Oct-2014
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
06-Jan-2015

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SLOVENSKI STANDARD
SIST EN ISO 683-17:2015
01-januar-2015
1DGRPHãþD
SIST EN ISO 683-17:2000

7RSORWQRREGHODQDMHNODOHJLUDQDLQDYWRPDWQDMHNODGHO-HNOD]DNURJOLþQHLQ

YDOMþQHOHåDMH ,62

Heat-treated steels, alloy steels and free-cutting steels - Part 17: Ball and roller bearing

steels (ISO 683-17:2014)
Für eine Wärmebehandlung bestimmte Stähle, legierte Stähle und Automatenstähle -
Teil 17: Wälzlagerstähle (ISO 683-17:2014)

Aciers pour traitement thermique, aciers alliés et aciers pour décolletage - Partie 17:

Aciers pour roulements (ISO 683-17:2014)
Ta slovenski standard je istoveten z: EN ISO 683-17:2014
ICS:
21.100.01 Ležaji na splošno Bearings in general
77.140.10 Jekla za toplotno obdelavo Heat-treatable steels
77.140.20 Visokokakovostna jekla Stainless steels
SIST EN ISO 683-17:2015 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 683-17:2015
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SIST EN ISO 683-17:2015
EUROPEAN STANDARD
EN ISO 683-17
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2014
ICS 77.140.10; 77.140.20 Supersedes EN ISO 683-17:1999
English Version
Heat-treated steels, alloy steels and free-cutting steels - Part 17:
Ball and roller bearing steels (ISO 683-17:2014)

Aciers pour traitement thermique, aciers alliés et aciers Für eine Wärmebehandlung bestimmte Stähle, legierte

pour décolletage - Partie 17: Aciers pour roulements (ISO Stähle und Automatenstähle - Teil 17: Wälzlagerstähle (ISO

683-17:2014) 683-17:2014)
This European Standard was approved by CEN on 20 September 2014.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels

© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 683-17:2014 E

worldwide for CEN national Members.
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SIST EN ISO 683-17:2015
EN ISO 683-17:2014 (E)
Contents Page

Foreword ..............................................................................................................................................................3

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SIST EN ISO 683-17:2015
EN ISO 683-17:2014 (E)
Foreword

This document (EN ISO 683-17:2014) has been prepared by Technical Committee ISO/TC 17 “Steel” in

collaboration with Technical Committee ECISS/TC 105 “Steels for heat treatment, alloy steels, free-cutting

steels and stainless steels” 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 April 2015, and conflicting national standards shall be withdrawn at the

latest by April 2015.

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 683-17:1999.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO 683-17:2014 has been approved by CEN as EN ISO 683-17:2014 without any modification.

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SIST EN ISO 683-17:2015
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SIST EN ISO 683-17:2015
INTERNATIONAL ISO
STANDARD 683-17
Third edition
2014-10-15
Heat-treated steels, alloy steels and
free-cutting steels —
Part 17:
Ball and roller bearing steels
Aciers pour traitement thermique, aciers alliés et aciers pour
décolletage —
Partie 17: Aciers pour roulements
Reference number
ISO 683-17:2014(E)
ISO 2014
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SIST EN ISO 683-17:2015
ISO 683-17:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014

All rights reserved. Unless otherwise specified, 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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved
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SIST EN ISO 683-17:2015
ISO 683-17:2014(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

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 ................................................................................................................................................................................................ 3

6.3 Heat treatment and surface condition at delivery .................................................................................................... 3

7 Requirements .......................................................................................................................................................................................................... 4

7.1 Chemical composition and hardenability ........................................................................................................................ 4

7.2 Microstructure ........................................................................................................................................................................................ 4

7.3 Non-metallic inclusions ................................................................................................................................................................... 5

7.4 Internal soundness .............................................................................................................................................................................. 5

7.5 Surface quality ......................................................................................................................................................................................... 5

7.6 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

9 Test methods ............................................................................................................................................................................................................. 6

9.1 Chemical analysis .................................................................................................................................................................................. 6

9.2 Hardness and hardenability tests ........................................................................................................................................... 7

10 Marking .......................................................................................................................................................................................................................... 7

Annex A (normative) Supplementary or special requirements ............................................................................................19

Annex B (informative) Designations of the steels given in Tables 3, 5 and 6 and of comparable

grades covered in various designation systems................................................................................................................22

Annex C (informative) Dimensional standards applicable to products complying with this part of

ISO 683 .........................................................................................................................................................................................................................24

Bibliography .............................................................................................................................................................................................................................25

© ISO 2014 – All rights reserved iii
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SIST EN ISO 683-17:2015
ISO 683-17:2014(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. 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. 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 on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers

to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 4, Heat treatable and

alloy steels.

This third edition cancels and replaces the second edition (ISO 683-17:1999), which has been technically

revised.

ISO 683 consists of the following parts, under the general title Heat treatable, alloy steels and free-cutting

steels:
— Part 1: Non-alloy steels for quenching and tempering
— Part 2: Alloy steels for quenching and tempering
— Part 3: Case-hardening steels
— Part 4: Free-cutting steels
— Part 5: Nitriding steels
— Part 14: Hot-rolled steels for quenched and tempered springs
— Part 15: Valve steels for internal combustion engines
— Part 17: Ball and roller bearing steels
— Part 18: Bright steel products
iv © ISO 2014 – All rights reserved
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SIST EN ISO 683-17:2015
INTERNATIONAL STANDARD ISO 683-17:2014(E)
Heat-treated steels, alloy steels and free-cutting steels —
Part 17:
Ball and roller bearing steels
1 Scope

1.1 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.

1.2 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.

1.3 In addition to this part of ISO 683, the general technical delivery requirements of ISO 404 are

applicable.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. 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 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 2014 – All rights reserved 1
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SIST EN ISO 683-17:2015
ISO 683-17:2014(E)
ISO 4969, Steel — Macroscopic examination by etching with strong mineral acids

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, Heat-treatable and alloy steels — Surface quality classes for hot-rolled round bars and wire

rods — Technical delivery conditions
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;
2 © ISO 2014 – All rights reserved
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SIST EN ISO 683-17:2015
ISO 683-17:2014(E)
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);

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
All steels shall be deoxidized.
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.
© ISO 2014 – All rights reserved 3
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SIST EN ISO 683-17:2015
ISO 683-17:2014(E)
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 Chemical composition and hardenability
7.1.1 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).
7.1.2 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).
7.1.3 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).
7.1.4 Hardness
The hardness in the usual conditions of delivery is given in Table 6.
7.2 Microstructure

7.2.1 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.
7.2.2 Spheroidization and distribution of carbides

7.2.2.1 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 shall

4 © ISO 2014 – All rights reserved
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SIST EN ISO 683-17:2015
ISO 683-17:2014(E)

be predominantly spheroidized. Case-hardening steels may show remnants of incompletely spheroidized

carbides. For the degree of spheroidization see A.4.
7.2.2.2 For distribution of carbides, see A.5.
7.2.3 Structure of case-hardening steels in the condition +FP

The structure shall consist of ferrite-pearlite. Bainite contents up to 10 % are, however, permissible.

7.3 Non-metallic inclusions
7.3.1 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.
7.3.2 Macroscopic inclusions

If verification is agreed then the method and acceptance limits shall be agreed at the time of enquiry

and order.
7.4 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.
7.5 Surface quality

7.5.1 All products shall have a smooth surface finish appropriate to the manufacturing process applied.

7.5.2 Ground or peeled/turned or machined products shall be free from surface discontinuities

detrimental to practical use and surface decarburization.

7.5.3 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.
7.6 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 Annex C) or, otherwise, on suitable national standards.

© ISO 2014 – All rights reserved 5
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SIST EN ISO 683-17:2015
ISO 683-17:2014(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 ISO/TR 9769.

6 © ISO 2014 – All rights reserved
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SIST EN ISO 683
...

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