SIST EN 10250-3:2022

SLOVENSKI STANDARD
01-maj-2022
Nadomešča:
SIST EN 10250-3:2000
Prosto kovani jekleni izkovki za splošno tehnično uporabo - 3. del: Legirana
plemenita jekla
Open die steel forgings for general engineering purposes - Part 3: Alloy special steels
Freiformschmiedestücke aus Stahl für allgemeine Verwendung - Teil 3: Legierte
Edelstähle
Pièces forgées en acier pour usage général - Partie 3: Aciers spéciaux alliés
Ta slovenski standard je istoveten z: EN 10250-3:2022
ICS:
77.140.20 Visokokakovostna jekla Stainless steels
77.140.85 Železni in jekleni kovani Iron and steel forgings
izdelki
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 10250-3
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 77.140.20; 77.140.85 Supersedes EN 10250-3:1999
English Version
Open die steel forgings for general engineering purposes -
Part 3: Alloy special steels
Pièces forgées en acier pour usage général - Partie 3: Freiformschmiedestücke aus Stahl für allgemeine
Aciers spéciaux alliés Verwendung - Teil 3: Legierte Edelstähle
This European Standard was approved by CEN on 14 February 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, 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10250-3:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Chemical composition . 4
4.1 Cast analysis . 4
4.2 Product analysis . 4
5 Heat treatment . 4
6 Mechanical properties . 4
Annex A (informative) Heat treatment. 9
Bibliography . 10
European foreword
This document (EN 10250-3:2022) has been prepared by Technical Committee CEN/TC 459 “ECISS -
European Committee for Iron and Steel Standardization” , the secretariat of which is held by AFNOR.
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 September 2022, and conflicting national standards shall
be withdrawn at the latest by September 2022.
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 10250-3:1999.
In comparison with the previous edition, the following technical modifications have been made:
— updating of normative references.
EN 10250, Open die steel forgings for general engineering purposes, consists of the following parts:
— Part 1: General requirements;
— Part 2: Non-alloy quality and special steels;
— Part 3: Alloy special steels;
— Part 4: Stainless steels.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Turkey and the United
Kingdom.
Through its sub-committee SC 11 “Steel castings and forgings” (secretariat: AFNOR).
1 Scope
This document specifies the technical delivery requirements for open die forgings, forged bars and
products pre-forged and finished in ring rolling mills, manufactured from alloy special steel and supplied
in the quenched and tempered condition.
The majority of steels listed in this document are identical to steels specified in EN ISO 683-1 and
EN ISO 683-2 and more extensive information on hardenability and technological properties is given in
these standards.
General information on technical delivery conditions is given in EN 10021.
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.
EN 10250-1:2022, Open die steel forgings for general engineering purposes - Part 1: General requirements
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
4 Chemical composition
4.1 Cast analysis
The chemical composition of the steel shall be determined by cast analysis and shall conform to the
analysis given in Table 1 (see EN 10250-1:2022, A.7 and A.8).
Measures should be taken to prevent the addition from the scrap, or other material used in the
manufacture of the steels, of such elements which affect the hardenability, mechanical properties and
applicability of the steel.
...