SIST EN ISO 683-2:2018
(Main)Heat treatable steels, alloy steels and free-cutting steels - Part 2: Alloy steels for quenching and tempering (ISO 683-2:2016)
Heat treatable steels, alloy steels and free-cutting steels - Part 2: Alloy steels for quenching and tempering (ISO 683-2:2016)
ISO 683-2:2016 specifies the technical delivery requirements for
- semi-finished products, hot formed, e.g. blooms, billets, slabs (see Note 1),
- bars (see Note 1),
- wire rod,
finished flat products, and
- hammer or drop forgings (see Note 1)
manufactured from the direct hardening alloy steels and the alloy flame- and induction-hardening steels listed in Table 3 and supplied in one of the heat-treatment conditions given for the different types of products in Table 1 and in one of the surface conditions given in Table 2.
The steels are, in general, intended for the manufacture of quenched and tempered or austempered (see 3.2 and Note 2) and flame- or induction-hardened machine parts (see Tables 8 and 9).
The requirements for mechanical properties given in ISO 683-2:2016 are restricted to the sizes given in the relevant Table 8.
NOTE 1 Hammer-forged semi-finished products (blooms, billets, slabs, etc.), seamless rolled rings and hammer-forged bars are in the following covered under semi-finished products or bars and not under the term "hammer and drop forgings".
NOTE 2 For the purposes of simplification, the term "quenched and tempered" is, unless otherwise indicated, used in the following also for the austempered condition.
NOTE 3 For International Standards relating to steels complying with the requirements for the chemical composition in Table 3, however, supplied in other product forms or treatment conditions than given above or intended for special applications, and for other related International Standards, see the Bibliography.
NOTE 4 ISO 683-2 :2016 does not apply to bright products and bars and wire rod for cold heading. For such products, see ISO 683‑18 and ISO 4954.
In special cases, variations in these technical delivery requirements or additions to them can form the subject of an agreement at the time of enquiry and order (see 5.2 and Annex B).
In addition to ISO 683-2:2016, the general technical delivery requirements of ISO 404 are applicable.
Für eine Wärmebehandlung bestimmte Stähle, legierte Stähle und Automatenstähle - Teil 2: Legierte Vergütungsstähle (ISO 683-2:2016)
Dieser Teil der ISO 683 legt die technischen Lieferbedingungen fest für
— Halbzeug, warmgeformt, zum Beispiel: Vorblöcke, Knüppel, Brammen (siehe Anmerkung 1),
— Stäbe (siehe Anmerkung 1),
— Walzdraht,
— fertige Flacherzeugnisse,
— Schmiedestücke (siehe Anmerkung 1)
hergestellt aus legierten Vergütungsstählen und legierten Stählen zum Flamm- und Induktionshärten nach
Tabelle 3, welche in einem der in Tabelle 1 für die verschiedenen Erzeugnisformen angegebenen
Wärmebehandlungszustände und in einem der in Tabelle 2 angegebenen Oberflächenausführungen geliefert
werden.
Die Stähle sind im Allgemeinen zur Herstellung vergüteter oder ausgetemperten (siehe 3.2 und Anmerkung
2) und flamm- oder induktionsgehärteter Maschinenteile (siehe Tabelle 8 und Tabelle 9) vorgesehen.
Die Anforderungen an die in diesem Teil der ISO 683 gegebenen mechanischen Eigenschaften beschränken
sich auf die in der Tabelle 8 angegebenen Maße.
ANMERKUNG 1 Freiformgeschmiedete Halbzeuge (Blöcke, Knüppel, Brammen usw.), nahtlos gewalzte Ringe und
freiformgeschmiedeter Stabstahl sind im Folgenden unter den Begriffen „Halbzeug“ und „Stabstahl“ und nicht unter dem
Begriff „Schmiedestücke“ erfasst.
ANMERKUNG 2 Aus Gründen der Vereinfachung wird im Folgenden der Term „vergütet“, soweit nicht anders
erwähnt, auch für den ausgetemperten Zustand verwendet.
ANMERKUNG 3 Bezüglich Internationaler Normen für Stähle, die die chemische Zusammensetzung nach Tabelle 3
erfüllen, die jedoch in anderen Erzeugnisformen oder Wärmebehandlungszuständen als oben angegeben oder für
besondere Anwendungen geliefert werden, sowie bezüglich anderer Internationaler Normen siehe die
Literaturhinweise.
ANMERKUNG 4 Dieser Teil der ISO 683 gilt nicht für Blankstahlerzeugnisse und für Stäbe und Walzdraht zum
Kaltstauchen. Für diese Erzeugnisse siehe ISO 683-18 und ISO 4954.
In Sonderfällen können bei der Anfrage und Bestellung Abweichungen von oder Zusätze zu diesen
technischen Lieferbedingungen vereinbart werden (siehe 5.2 und Anhang B).
Zusätzlich zu diesem Teil der ISO 683 sind die allgemeinen technischen Lieferbedingungen nach ISO 404
anzuwenden.
Aciers pour traitement thermique, aciers alliés et aciers pour décolletage - Partie 2: Aciers alliés pour trempe et revenue (ISO 683-2:2016)
Cette partie de l'ISO 683 spécifie les conditions techniques de livraison des:
— demi-produits laminés à chaud, comme par exemple les blooms, billettes et brames (voir Note 1);
— barres (voir Note 1),
— fils machine,
— produits plats finis, et
— pièces forgées par martelage ou estampage (voir Note 1)
fabriqués à partir d'aciers non alliés à trempe directe et d'aciers non alliés par trempe au chalumeau et par induction énumérés dans le Tableau 3 et livrés dans l'un des états de traitement thermique donnés pour les différents types de produits dans le Tableau 1 et dans l'un des états de surface donnés dans le Tableau 2.
D'une manière générale, ces aciers sont destinés à la fabrication de pièces mécaniques trempées et revenues ou ayant subi un procédé de trempe étagée bainitique (voir 3.2 et Note 2) ou à la fabrication de pièces mécaniques trempées par induction ou au chalumeau (voir Tableau 8 et 9).
Les exigences en matière de caractéristiques mécaniques données dans cette partie de l'ISO 683 sont limitées aux dimensions données dans le Tableau 8.
NOTE 1 Les demi-produits forgés par martelage (blooms, billettes, brames, etc.), les couronnes laminées sans soudure et les barres forgées par martelage figurent parmi les demi-produits ou les barres, et non sous l'appellation «pièces forgées par martelage ou estampage».
NOTE 2 Dans un but de simplification, l'expression «trempé et revenu» est aussi, sauf indication contraire, utilisée dans les parties suivantes pour l'état «trempe étagée bainitique».
NOTE 3 Pour les Normes internationales relatives aux aciers qui sont conformes aux exigences de composition chimique du Tableau 3, mais fournis sous d'autres formes de produits ou dans des états de traitement autres que ceux indiqués ci-dessus, ou qui sont destinés à des applications spéciales, ainsi que pour d'autres Normes internationales analogues, voir la Bibliographie.
NOTE 4 La présente partie de l'ISO 683 ne s'applique pas aux produits transformés à froid, barres et fils machine pour frappe à froid. Pour ces produits, voir les ISO 683‑18 et ISO 4954.
Dans certains cas particuliers, il est possible de déroger aux présentes conditions techniques de livraison ou d'en ajouter d'autres, à condition que le fabricant et l'acheteur en conviennent au moment de l'appel d'offres et de la commande (voir 5.2 et Annexe B).
En plus de cette partie de l'ISO 683, les conditions générales techniques de livraison de l'ISO 404 sont applicables.
Toplotno obdelana, legirana in avtomatna jekla - 2. del: Legirana jekla za poboljšanje (ISO 683-2:2016)
ISO 683-2:2016 določa tehnične dobavne zahteve za
– vroče oblikovane polizdelke, npr. bloke, palice, plošče (glej opombo 1),
– drogove (glej opombo 1),
– valjane žice,
končne ploščate izdelke in
– izkovke, kovane s padalnimi kladivi (glej opombo 1),
izdelane iz legiranih jekel z neposrednim utrjanjem ter legiranih jekel s plamenskim in induktivnim utrjanjem, navedenih v preglednici 3, ter dobavljenih v enem od stanj toplotne obdelave, podanih za različne vrste izdelkov v preglednici 1, in enem od površinskih stanj, podanih v preglednici 2.
Jekla so na splošno namenjena za izdelavo poboljšanih ali bainitno poboljšanih (glej točko 3.2 in opombo 2) ter plamensko in induktivno utrjenih strojnih delov (glej preglednici 8 in 9).
Zahteve za mehanske lastnosti, podane v standardu ISO 683-2:2016, so omejene na velikosti, podane v zadevni preglednici 8.
OPOMBA 1: S kladivom kovani polizdelki (bloki, palice, plošče itd.), nevarjeni valjani obročki in s kladivom kovani drogovi so v nadaljevanju zajeti pod polizdelki ali drogovi in ne pod izrazom »izkovki, kovani s padalnimi kladivi«.
OPOMBA 2: Za namene poenostavitve se izraz »poboljšani«, razen če je navedeno drugače, v nadaljevanju uporablja tudi za stanje bainitnega poboljšanja.
OPOMBA 3: Za mednarodne standarde v zvezi z jekli, skladnimi z zahtevami za kemično sestavo v preglednici 3, ki pa so dobavljena v drugih oblikah izdelkov ali stanjih obdelave, kot so podani zgoraj, ali namenjena za posebne aplikacije, in za druge povezane mednarodne standarde glej bibliografijo.
OPOMBA 4: ISO 683-2 :2016 se ne uporablja za svetle izdelke in drogove ter valjane žice za hladno nakrčevanje. Za takšne izdelke glej ISO 683‑18 in ISO 4954.
V posebnih primerih so lahko različice teh splošnih tehničnih dobavnih zahtev ali dodatki k njim predmet sporazuma v času povpraševanja in naročila (glej točko 5.2 in dodatek B).
Poleg standarda ISO 683-2:2016 se uporabljajo tudi splošne tehnične dobavne zahteve standarda ISO 404.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 683-2:2018
01-september-2018
1DGRPHãþD
SIST EN 10083-1:2006
SIST EN 10083-3:2006
SIST EN 10083-3:2006/AC:2008
Toplotno obdelana, legirana in avtomatna jekla - 2. del: Legirana jekla za
poboljšanje (ISO 683-2:2016)
Heat treatable steels, alloy steels and free-cutting steels - Part 2: Alloy steels for
quenching and tempering (ISO 683-2:2016)
Für eine Wärmebehandlung bestimmte Stähle, legierte Stähle und Automatenstähle -
Teil 2: Legierte Vergütungsstähle (ISO 683-2:2016)
Aciers pour traitement thermique, aciers alliés et aciers pour décolletage - Partie 2:
Aciers alliés pour trempe et revenue (ISO 683-2:2016)
Ta slovenski standard je istoveten z: EN ISO 683-2:2018
ICS:
77.140.10 Jekla za toplotno obdelavo Heat-treatable steels
77.140.20 Visokokakovostna jekla Stainless steels
SIST EN ISO 683-2:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 683-2:2018
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SIST EN ISO 683-2:2018
EN ISO 683-2
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2018
EUROPÄISCHE NORM
ICS 77.140.10; 77.140.20; 77.140.45 Supersedes EN 10083-1:2006, EN 10083-3:2006
English Version
Heat-treatable steels, alloy steels and free-cutting steels -
Part 2: Alloy steels for quenching and tempering (ISO 683-
2:2016)
Aciers pour traitement thermique, aciers alliés et Für eine Wärmebehandlung bestimmte Stähle, legierte
aciers pour décolletage - Partie 2: Aciers alliés pour Stähle und Automatenstähle - Teil 2: Legierte
trempe et revenu (ISO 683-2:2016) Vergütungsstähle (ISO 683-2:2016)
This European Standard was approved by CEN on 18 May 2018.
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, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 683-2:2018 E
worldwide for CEN national Members.
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SIST EN ISO 683-2:2018
EN ISO 683-2:2018 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 683-2:2018
EN ISO 683-2:2018 (E)
European foreword
The text of ISO 683-2:2016 has been prepared by Technical Committee ISO/TC 17 “Steel” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 683-2:2018 by
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 December 2018, and conflicting national standards
shall be withdrawn at the latest by December 2018.
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 10083-1:2006, EN 10083-3:2006.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 683-2:2016 has been approved by CEN as EN ISO 683-2:2018 without any modification.
3
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SIST EN ISO 683-2:2018
EN ISO 683-2:2018 (E)
The European steel numbers to the steel grades are to be found in informative Annex C.
The references to following European standards are given for information:
EN 10017, Steel rod for drawing and/or cold rolling - Dimensions and tolerances
EN 10021, General technical delivery conditions for steel products
EN 10029, Hot-rolled steel plates 3 mm thick or above - Tolerances on dimensions and shape
EN 10048, Hot rolled narrow steel strip - Tolerances on dimensions and shape
EN 10051, Continuously hot-rolled strip and plate/sheet cut from wide strip of non-alloy and alloy steels -
Tolerances on dimensions and shape
EN 10058, Hot rolled flat steel bars for general purposes - Dimensions and tolerances on shape and
dimensions
EN 10059, Hot rolled square steel bars for general purposes - Dimensions and tolerances on shape and
dimensions
EN 10060, Hot rolled round steel bars for general purposes - Dimensions and tolerances on shape and
dimensions
EN 10061, Hot rolled hexagon steel bars for general purposes - Dimensions and tolerances on shape and
dimensions
EN 10108, Round steel rod for cold heading and cold extrusion - Dimensions and tolerances
EN 10160, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection
method)
EN 10204, Metallic products - Types of inspection documents
EN 10308, Non destructive testing - Ultrasonic testing of steel bars
4
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SIST EN ISO 683-2:2018
INTERNATIONAL ISO
STANDARD 683-2
Second edition
2016-07-01
Heat-treatable steels, alloy steels and
free-cutting steels —
Part 2:
Alloy steels for quenching and
tempering
Aciers pour traitement thermique, aciers alliés et aciers pour
décolletage —
Partie 2: Aciers alliés pour trempe et revenu
Reference number
ISO 683-2:2016(E)
©
ISO 2016
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SIST EN ISO 683-2:2018
ISO 683-2:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
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
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Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
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SIST EN ISO 683-2:2018
ISO 683-2:2016(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification and designation . 3
4.1 Classification . 3
4.2 Designation . 3
5 Information to be supplied by the purchaser. 3
5.1 Mandatory information . 3
5.2 Options and/or supplementary or special requirements . 3
5.3 Ordering example . 4
6 Manufacturing process . 4
6.1 General . 4
6.2 Deoxidation . 4
6.3 Heat-treatment condition and surface condition at delivery . 4
6.3.1 Heat-treatment condition . 4
6.3.2 Particular surface conditions . 4
6.4 Traceability of the cast . 4
7 Requirements . 5
7.1 Chemical composition, mechanical properties and hardenability . 5
7.1.1 General. 5
7.1.2 Chemical composition . 5
7.1.3 Mechanical properties . 5
7.1.4 Hardenability . 5
7.1.5 Surface hardness . 5
7.2 Machinability . 5
7.3 Cold shearability . 5
7.4 Grain size . 6
7.5 Non-metallic inclusions . 6
7.5.1 Microscopic inclusions . 6
7.5.2 Macroscopic inclusions . 6
7.6 Internal soundness . 6
7.7 Surface quality . 6
7.8 Decarburization . 7
7.9 Shape, dimensions and tolerances . 7
8 Inspection . 7
8.1 Testing procedures and types of documents . 7
8.2 Frequency of testing . 7
8.3 Specific inspection and testing . 8
8.3.1 Verification of the hardenability, hardness and mechanical properties . 8
8.3.2 Visual and dimensional inspection . 8
9 Test methods . 8
9.1 Chemical analysis . 8
9.2 Mechanical tests . 8
9.2.1 Tensile test . 8
9.2.2 Impact test . 8
9.3 Hardness and hardenability tests . 8
9.3.1 Hardness in treatment conditions +A and +S . 8
9.3.2 Verification of hardenability . 9
9.3.3 Surface hardness . 9
9.4 Retests . 9
© ISO 2016 – All rights reserved iii
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SIST EN ISO 683-2:2018
ISO 683-2:2016(E)
10 Marking . 9
Annex A (normative) Ruling sections for mechanical properties .31
Annex B (normative) Supplementary or special requirements .35
Annex C (informative) Designation of steels given in this part of ISO 683 and of comparable
grades covered in various designation systems.37
Annex D (informative) Dimensional standards applicable to products complying with this
part of ISO 683 .39
Bibliography .40
iv © ISO 2016 – All rights reserved
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SIST EN ISO 683-2:2018
ISO 683-2:2016(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 on 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 the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 4, Heat treatable and
alloy steels.
This second edition cancels and replaces the first edition (ISO 683-2:2012), of which it constitutes a
minor revision.
ISO 683 consists of the following parts, under the general title Heat-treatable steels, 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
© ISO 2016 – All rights reserved v
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SIST EN ISO 683-2:2018
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SIST EN ISO 683-2:2018
INTERNATIONAL STANDARD ISO 683-2:2016(E)
Heat-treatable steels, alloy steels and free-cutting steels —
Part 2:
Alloy steels for quenching and tempering
1 Scope
This part of ISO 683 specifies the technical delivery requirements for
— semi-finished products, hot formed, e.g. blooms, billets, slabs (see Note 1),
— bars (see Note 1),
— wire rod,
— finished flat products, and
— hammer or drop forgings (see Note 1)
manufactured from the direct hardening alloy steels and the alloy flame- and induction-hardening
steels listed in Table 3 and supplied in one of the heat-treatment conditions given for the different types
of products in Table 1 and in one of the surface conditions given in Table 2.
The steels are, in general, intended for the manufacture of quenched and tempered or austempered
(see 3.2 and Note 2) and flame- or induction-hardened machine parts (see Tables 8 and 9).
The requirements for mechanical properties given in this part of ISO 683 are restricted to the sizes
given in the relevant Table 8.
NOTE 1 Hammer-forged semi-finished products (blooms, billets, slabs, etc.), seamless rolled rings and
hammer-forged bars are in the following covered under semi-finished products or bars and not under the term
“hammer and drop forgings”.
NOTE 2 For the purposes of simplification, the term “quenched and tempered” is, unless otherwise indicated,
used in the following also for the austempered condition.
NOTE 3 For International Standards relating to steels complying with the requirements for the chemical
composition in Table 3, however, supplied in other product forms or treatment conditions than given above or
intended for special applications, and for other related International Standards, see the Bibliography.
NOTE 4 This part of ISO 683 does not apply to bright products and bars and wire rod for cold heading. For
such products, see ISO 683-18 and ISO 4954.
In special cases, variations in these technical delivery requirements or additions to them can form the
subject of an agreement at the time of enquiry and order (see 5.2 and Annex B).
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 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method
© ISO 2016 – All rights reserved 1
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SIST EN ISO 683-2:2018
ISO 683-2:2016(E)
ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical testing
ISO 404:2013, 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 3887, Steels — Determination of depth of decarburization
1)
ISO 4885:— , Ferrous products — Heat treatments — Vocabulary
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 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H,
K, N, T)
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 6929, Steel products — Vocabulary
ISO 7788, Steel — Surface finish of hot-rolled plates and wide flats — Delivery requirements
ISO 9443, Heat-treatable and alloy steels — Surface quality classes for hot-rolled round bars and wire
rods — Technical delivery conditions
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 definitions in ISO 377, ISO 4885, ISO 4948-1, ISO 4948-2,
ISO 6929, ISO 14284, and the following apply.
NOTE For deviations from these terms and definitions, see Notes 1 and 2 of Clause 1.
3.1
ruling section
section for which the specified mechanical properties shall apply
Note 1 to entry: Independent of the actual shape and dimensions of the cross-section of the product, the size of its
ruling section is always given by a diameter. This corresponds to the diameter of an “equivalent round bar”. That
is a round bar which will show the same cooling rate as the actual ruling section of the product concerned at its
position for taking the test pieces, when being cooled from austenitizing temperature.
1) Under preparation. Stage at the time of publication: ISO/DIS 4885:2016.
2 © ISO 2016 – All rights reserved
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SIST EN ISO 683-2:2018
ISO 683-2:2016(E)
3.2
austempering
isothermal heat treatment for producing bainitic or ausferritic structure of a work piece
Note 1 to entry: The final cooling to ambient temperature is not at a specific rate.
2)
[SOURCE: ISO 4885:— , 3.11]
3.3
alloy steel
as defined in ISO 4948-1:1982, 3.1.3
4 Classification and designation
4.1 Classification
The classification of the relevant steel grades is according to ISO 4948-1 and ISO 4948-2. All steel grades
covered by this part of ISO 683 are alloy special steels.
4.2 Designation
For the steel grades covered by this part of ISO 683, the steel names as 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) quantity to be delivered;
b) designation of the product form (slab, bloom, billet, round bar, wire rod, wide flat, sheet, plate, strip,
forging, etc.);
c) either the designation of the dimensional standard and the dimensions and tolerances selected
from this (see 7.9) or, for example in the case of drop forgings, the designation of the drawing or any
other document covering the dimensions and tolerances required for the product;
d) reference to this part of ISO 683, i.e. ISO 683-2;
e) the designation of the steel grade given in Table 3;
f) the symbol for the required heat-treatment condition (see Table 1, column 2);
g) standard designation for a test report 2.2 or, if required any other type of inspection document in
accordance with ISO 10474 or according to another regional standard, e.g. EN 10204 or JIS G 0415.
5.2 Options and/or supplementary or special requirements
Several options are specified in this part of ISO 683 and listed below. If the purchaser does not indicate
any of these 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 7.7);
2) Under preparation. Stage at the time of publication: ISO/DIS 4885:2016.
© ISO 2016 – All rights reserved 3
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SIST EN ISO 683-2:2018
ISO 683-2:2016(E)
b) any requirement for the hardenability (+H, +HH, +HL) for special steels (see 7.1.4 and Tables 5 to 7);
c) any supplementary requirement that shall be com
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