prEN 10250-1
(Main)Open die steel forgings for general engineering purposes - Part 1: General requirements
Open die steel forgings for general engineering purposes - Part 1: General requirements
This document specifies the general technical delivery conditions for open die forgings, forged bars, and products pre-forged and finished in ring rolling mills, for general engineering purposes.
General information on technical delivery conditions is given in EN 10021.
Freiformschmiedestücke aus Stahl für allgemeine Verwendung - Teil 1: Allgemeine Anforderungen
Dieser Teil dieser Europäischen Norm legt die allgemeinen technischen Lieferbedingungen für Freiformschmiedestücke, geschmiedete Stäbe und Erzeugnisse, die vorgeschmiedet und in Ringwalzwerken fertig umgeformt werden, fest. Sie sind für allgemeine Verwendung bestimmt.
Allgemeine Angaben über die technischen Lieferbedingungen enthält EN 10021.
Pièces forgées en acier pour usage général - Partie 1: Exigences générales
Le présent document spécifie les conditions techniques générales de livraison des pièces obtenues par forgeage libre, des barres forgées, des produits pré-forgés et finis par laminage circulaire pour usage général.
Les informations générales sur les conditions techniques de livraison sont données dans l’EN 10021.
Prosto kovani jekleni izkovki za splošno tehnično uporabo - 1. del: Splošne zahteve
General Information
RELATIONS
Standards Content (sample)
SLOVENSKI STANDARD
oSIST prEN 10250-1:2021
01-januar-2021
Prosto kovani jekleni izkovki za splošno tehnično uporabo - 1. del: Splošne
zahteve
Open die steel forgings for general engineering purposes - Part 1: General requirements
Freiformschmiedestücke aus Stahl für allgemeine Verwendung - Teil 1: AllgemeineAnforderungen
Pièces forgées en acier pour usage général - Partie 1: Exigences générales
Ta slovenski standard je istoveten z: prEN 10250-1
ICS:
77.140.85 Železni in jekleni kovani Iron and steel forgings
izdelki
oSIST prEN 10250-1:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 10250-1:2021
DRAFT
EUROPEAN STANDARD
prEN 10250-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2020
ICS 77.140.85 Will supersede EN 10250-1:1999
English Version
Open die steel forgings for general engineering purposes -
Part 1: General requirements
Pièces forgées en acier pour usage général - Partie 1: Freiformschmiedestücke aus Stahl für allgemeine
Exigences générales Verwendung - Teil 1: Allgemeine AnforderungenThis draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 459/SC 11.If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.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.Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10250-1:2020 E
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prEN 10250-1:2020 (E)
Contents Page
European foreword ....................................................................................................................................................... 4
1 Scope .................................................................................................................................................................... 5
2 Normative references .................................................................................................................................... 5
3 Terms and definitions ................................................................................................................................... 6
4 Classification and designation .................................................................................................................... 6
4.1 Classification ..................................................................................................................................................... 6
4.2 Designation........................................................................................................................................................ 6
5 Information to be supplied by the purchaser ....................................................................................... 7
5.1 Mandatory information ................................................................................................................................ 7
5.2 Options ................................................................................................................................................................ 7
6 Manufacture of the steel ............................................................................................................................... 7
6.1 Steelmaking process ...................................................................................................................................... 7
6.2 Deoxidation ....................................................................................................................................................... 7
7 Manufacture of the product ......................................................................................................................... 7
7.1 Hot working ....................................................................................................................................................... 7
7.2 Forging reduction............................................................................................................................................ 8
7.3 Heat treatment ................................................................................................................................................. 8
7.4 Weldability ........................................................................................................................................................ 8
8 Surface condition and internal soundness ............................................................................................ 8
8.1 General ................................................................................................................................................................ 8
8.2 Removal or surface defects .......................................................................................................................... 8
8.3 Dimensions, shape and tolerances and nominal mass ...................................................................... 8
8.4 Compatibility with non-destructive testing (NDT) ............................................................................. 8
9 Chemical composition ................................................................................................................................... 9
9.1 Cast analysis ...................................................................................................................................................... 9
9.2 Product analysis (optional requirement) .............................................................................................. 9
10 Mechanical properties ................................................................................................................................... 9
11 Sampling and preparation of test pieces ................................................................................................ 9
11.1 General ................................................................................................................................................................ 9
11.2 Methods used for the provision of samples ........................................................................................... 9
11.3 Preparation of test pieces ......................................................................................................................... 10
12 Mechanical test methods ........................................................................................................................... 11
12.1 General ............................................................................................................................................................. 11
12.2 Hardness tests ............................................................................................................................................... 11
12.3 Tensile tests ................................................................................................................................................... 11
12.4 Impact tests .................................................................................................................................................... 11
12.5 Intergranular corrosion test .................................................................................................................... 11
13 Retests and re-heat treatment ................................................................................................................ 11
13.1 Retests .............................................................................................................................................................. 11
13.2 Re-heat treatment ........................................................................................................................................ 11
14 Inspection ....................................................................................................................................................... 11
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15 Marking ............................................................................................................................................................ 12
Annex A (normative) Options ................................................................................................................................ 13
Annex B (informative) Ruling section and equivalent thickness ............................................................. 15
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prEN 10250-1:2020 (E)
European foreword
This document (prEN 10250-1:2020) has been prepared by Technical Committee CEN/TC 459 “Steel
castings and forgings”, the secretariat of which is held by AFNOR.This document is currently submitted to the CEN Enquiry.
This document will supersede EN 10250-1:1999.
In comparison with the previous edition, the following technical modifications have been made:
— updating of normative references;— alignment of the text with reference standards.
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.
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1 Scope
This document specifies the general technical delivery conditions for open die forgings, forged bars, and
products pre-forged and finished in ring rolling mills, for general engineering purposes.
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.
CEN/TR 10261, Iron and steel - European standards for the determination of chemical composition
EN 10020, Definition and classification of grades of steelEN 10021, General technical delivery conditions for steel products
EN 10027-1, Designation systems for steels - Part 1: Steel names
EN 10027-2, Designation systems for steels - Part 2: Numerical system
EN 10079, Definition of steel products
EN 10168, Steel products - Inspection documents - List of information and description
EN 10204, Metallic products - Types of inspection documentsEN 10228-1, Non-destructive testing of steel forgings - Part 1: Magnetic particle inspection
EN 10228-2, Non-destructive testing of steel forgings - Part 2: Penetrant testing
EN 10228-3, Non-destructive testing of steel forgings - Part 3: Ultrasonic testing of ferritic or martensitic
steel forgingsEN 10228-4, Non-destructive testing of steel forgings - Part 4: Ultrasonic testing of austenitic and austenitic-
ferritic stainless steel forgingsprEN 10250-2, Open die steel forgings for general engineering purposes - Part 2: Non-alloy quality and
special steelsprEN 10250-3, Open die steel forgings for general engineering purposes - Part 3: Alloy special steels
EN 10250-4, Open die steel forgings for general engineering purposes - Part 4: Stainless steels
EN ISO 148-1, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-1)
EN ISO 377, Steel and steel products - Location and preparation of samples and test pieces for mechanical
testing (ISO 377)EN ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels - Part 2: Ferritic,
austenitic and ferritic-austenitic (duplex) stainless steels - Corrosion test in media containing sulfuric acid
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EN ISO 4885, Ferrous materials - Heat treatments - Vocabulary (ISO 4885)
EN ISO 6506-1, Metallic materials - Brinell hardness test - Part 1: Test method (ISO 6506-1)
EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-
EN ISO 9606-1, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1)
EN ISO 15607, Specification and qualification of welding procedures for metallic materials - General rules
(ISO 15607)EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials - Welding
procedure specification - Part 1: Arc welding (ISO 15609-1)EN ISO 15614-1, Specification and qualification of welding procedures for metallic materials - Welding
procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-
3 Terms and definitionsFor the purposes of this document the terms and definitions given in EN 10020, EN 10021, EN 10079,
EN ISO 377, EN ISO 4885, and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
batch
forgings of similar dimensions from the same cast, made by the same forging procedure and from the
same heat treatment chargeNote 1 to entry: "Similar dimensions" are to be taken as forgings having dimensions within ± 10 % of the
equivalent thickness.4 Classification and designation
4.1 Classification
The steels covered by this document are classified as follows:
— Non-alloy quality and special steels, see prEN 10250-2;
— Alloy special steels, see prEN 10250-3;
— Stainless steels, see EN 10250-4.
4.2 Designation
The steels in prEN 10250-2, prEN 10250-3 and EN 10250-4 shall be designated in accordance with the
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5 Information to be supplied by the purchaser
5.1 Mandatory information
The purchaser shall select the steel type, the shape and dimensions of the forgings taking the intended
use into account.The purchaser shall provide in the order all the information necessary for describing the forging and its
characteristics and details concerning delivery including the following:a) the quantity of forgings required;
b) the forging dimensions, or the drawing number(s) containing the dimensions, tolerances and surface
finish, with which the forging shall conform;c) the steel designation (name or number) of the material of which the forgings are made (see 4.2);
d) whether the purchaser has any specific requirements on the hot working process or need to be
informed of the forging procedure (see A.2 and A.3);e) whether production and testing of the forgings is to be witnessed by the purchaser's representative
and if so, the particular stages in production and testing at which the purchaser's representative may
require to be present (see Clause 14);f) any required options (see 5.2 and Annex A);
g) if required, the type of inspection document in accordance with EN 10204.
5.2 Options
A number of options are available, and these are detailed in Annex A. Where any of the options given are
specified at the time of the order, the forgings shall conform to the requirements of any such option, in
addition to the mandatory requirements of this document.If the purchaser does not specify any options at the time of enquiry and order, the manufacturer shall
supply in accordance with the basic specification.6 Manufacture of the steel
6.1 Steelmaking process
The steel shall be produced by an electric process or one of the basic oxygen processes (see A.1).
6.2 DeoxidationThe steel shall be fully killed.
7 Manufacture of the product
7.1 Hot working
The choice of hot working process shall be at the discretion of the manufacturer (see A.2).
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7.2 Forging reduction
The forging shall receive a sufficient forging reduction to completely consolidate the forging and remove
the cast structure (see A.3).7.3 Heat treatment
The forgings shall be delivered in a heat treated condition as specified in the relevant Part of EN 10250,
unless otherwise agreed at the time of enquiry and order.7.4 Weldability
The steel in this document are generally regarded as
...
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