prEN 10250-2

• Abstract:

  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 non-alloy quality and special steels and supplied in the normalized, normalized and tempered, quenched and tempered or annealed condition.; The majority of steels listed in this document, with properties in the quenched and tempered condition up to 160 mm thickness, 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.

• Status: Not Published
• Publication Date: 06-Dec-2027
• ICS: 77.140.45 - Non-alloyed steels
• ICS: 77.140.85 - Iron and steel forgings
• Technical Committee: ECISS/TC 111 - Steel castings and forgings
• Drafting Committee: CEN/TC 459/SC 11/WG 2 - Steel forgings
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 03-Sep-2026
• Due Date: 17-Nov-2026
• Completion Date: 03-Sep-2026
• Ref Project: oSIST prEN 10250-2:2026 - Open die steel forgings for general engineering purposes - Part 2: Non-alloy quality and special steels

• Revises: EN 10250-2:2022 - Open die steel forgings for general engineering purposes - Part 2: Non-alloy quality and special steels
• Effective Date: 07-Apr-2025

prEN 10250-2 is a draft European Standard from CEN for open die steel forgings for general engineering purposes, Part 2 covering non-alloy quality and special steels. It specifies the technical delivery requirements for open die forgings, forged bars, and products pre-forged and finished in ring rolling mills, for suppliers, purchasers, and inspectors who need to order, test, or accept these products.

What does prEN 10250-2 specify?

prEN 10250-2 covers non-alloy quality and special steels supplied in the normalized, normalized and tempered, quenched and tempered, or annealed condition. It gives the delivery requirements for the product forms named in the scope and organizes them into clauses on composition, heat treatment, and mechanical properties, with one informative annex for heat treatment.

The document is structured as follows:

Annex	What it covers
Annex A	Heat treatment, for guidance

The scope also places the steels in context with EN ISO 683-1 and EN ISO 683-2, noting that many quenched and tempered grades up to 160 mm thickness are identical to grades in those standards. EN 10021 is named for general technical delivery conditions.

What are the key requirements of prEN 10250-2?

prEN 10250-2 sets chemical, heat-treatment, and mechanical-property requirements that change with steel grade and ruling section thickness. In practice, the buyer and manufacturer need to match the grade, the delivery condition, and the section size before accepting a forging.

Chemical composition and product analysis

The chemical composition shall be determined by cast analysis and must conform to Table 1. Product analysis is also controlled, and its permitted deviation from the cast analysis is taken from EN ISO 683-1. This matters because chemistry drives hardenability, strength, and the suitability of the forging for later heat treatment.

Table 1 lists the covered grades, including S235JR, S215G, S325G, C22 to C60 and their E grades, plus 28Mn6 and 20Mn5. The document also allows aluminium, titanium, vanadium, and niobium for grain size control, while other added elements need purchaser agreement. That means chemistry is not just checked on paper - it is part of the delivery agreement.

Heat treatment

Annex A gives heat-treatment guidance by steel grade. It covers normalizing, quenching, tempering, and the cooling media used for each grade, and it notes that a polymer solution may be used instead of oil. For the reader, this is the reference for setting the furnace route and quench practice for each steel designation.

Mechanical properties and testing

For forgings in the normalized, normalized and tempered, and quenched and tempered condition, test pieces shall be selected, prepared, and tested in accordance with EN 10250-1:2022, Clauses 11 and 12. The resulting properties shall meet Tables 2 and 3. The acceptance values depend on the ruling section thickness, so section size is part of the specification, not just geometry.

Tables 2 and 3 also distinguish longitudinal and transverse test directions, and some grades include impact-test requirements at -20 °C. In practice, this means the same steel can have different acceptance values depending on direction, thickness, and condition.

Annealed forgings

For steels C45, C55, and C60 in the annealed condition, representative forgings selected by agreement with the purchaser shall be Brinell hardness tested in designated positions using EN ISO 6506-1. The maximum hardness shall not exceed the limits in Table 4. This gives a simple acceptance route when the delivery condition is soft-annealed rather than strength-controlled.

What terms does prEN 10250-2 use?

• Cast analysis - the chemical analysis taken from the heat, used as the primary composition check for the steel.
• Product analysis - the chemical analysis of the finished product, used to confirm that the forging still matches the allowed composition window.
• Ruling section - the section thickness used to select the mechanical-property values in Tables 2 and 3.
• Brinell hardness (HB) - an indentation hardness value used here to accept annealed forgings.
• Longitudinal (l) - the test direction parallel to the main working direction of the forging.
• Transverse (tr) - the test direction across the main working direction of the forging.

Who uses prEN 10250-2?

Forge manufacturers and ring rolling mills use prEN 10250-2 to control chemistry, heat treatment, and testing before release. Purchasers, quality managers, and inspectors use it to specify the delivery condition, choose the right grade, and check acceptance results. Testing laboratories use it for the test direction, hardness method, and property tables that support certification and incoming inspection.

What changed in prEN 10250-2 from the previous edition?

prEN 10250-2 will supersede EN 10250-2:2022. The draft states these technical changes compared with the previous edition:

• updated normative references;
• corrected steel designations and steel numbers;
• modified mechanical values for some steel grades and their attributed wall thicknesses.

Which standards are used with prEN 10250-2?

• EN 10250-1:2022 - gives the general requirements for open die steel forgings, and the test-piece preparation and testing clauses referenced in this part.
• EN ISO 683-1:2018 - provides the product-analysis deviation limits and related steel-grade information used with the composition requirements.
• EN ISO 6506-1 - gives the Brinell hardness test method used for annealed forgings.
• EN 10021 - provides the general technical delivery conditions for steel products named in the scope.
• EN ISO 683-2 - is cited in the scope and bibliography as the companion source for alloy steels and additional hardenability and technological-property information.
• EN 10250-1, EN 10250-3, and EN 10250-4 - are the other parts of the EN 10250 series for general requirements, alloy special steels, and stainless steels.

What does the prEN 10250-2 document contain?

The document contains a grade-by-grade chemical composition table, mechanical-property tables split by heat-treatment condition and ruling section thickness, and a maximum-hardness table for annealed forgings. It also contains an informative annex with heat-treatment guidance, including quenching media and temperature ranges by steel designation. The tables are set up for ordering, mill certification, inspection, and acceptance of forged products.

SLOVENSKI STANDARD
01-september-2026
Prosto kovani jekleni izkovki za splošno tehnično uporabo - 2. del: Nelegirana
kakovostna in plemenita jekla
Open die steel forgings for general engineering purposes - Part 2: Non-alloy quality and
special steels
Freiformschmiedestücke aus Stahl für allgemeine Verwendung - Teil 2: Unlegierte
Qualitäts- und Edelstähle
Pièces forgées en acier pour usage général - Partie 2: Aciers de qualité non alliés et
aciers spéciaux
Ta slovenski standard je istoveten z: prEN 10250-2
ICS:
77.140.20 Visokokakovostna jekla Stainless steels
77.140.45 Nelegirana jekla Non-alloyed 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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2026
ICS 77.140.45; 77.140.85 Will supersede EN 10250-2:2022
English Version
Open die steel forgings for general engineering purposes -
Part 2: Non-alloy quality and special steels
Pièces forgées en acier pour usage général - Partie 2: Freiformschmiedestücke aus Stahl für allgemeine
Aciers de qualité non alliés et aciers spéciaux Verwendung - Teil 2: Unlegierte Qualitäts- und
Edelstähle
This 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, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10250-2:2026 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 . 5
6 Mechanical properties . 5
6.1 Forgings in the normalized, normalized and tempered, and quenched and tempered
condition . 5
6.2 Forgings in the annealed condition (Steels C45, C55 and C60) . 5
Annex A (informative) Heat treatment. 11
Bibliography . 12
European foreword
This document (prEN 10250-2:2026) has been prepared by Technical Committee CEN/TC 459/SC 11
“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 10250-2:2022.
In comparison with the previous edition, the following technical modifications have been made:
— updating of normative references;
— correction of wrong steel designations and steel numbers;
— modifications to mechanical values of some steel grades and their attributed wall thicknesses.
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.
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 non-alloy quality and special
steels and supplied in the normalized, normalized and tempered, quenched and tempered or annealed
condition.
The majority of steels listed in this document, with properties in the quenched and tempered condition
up to 160 mm thickness, 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
EN ISO 683-1:2018, Heat-treatable steels, alloy steels and free-cutting steels - Part 1: Non-alloy steels for
quenching and tempering (ISO 683-1:2016)
EN ISO 6506-1, Metallic materials - Brinell hardness test - Part 1: Test method (ISO 6506-1)
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 steel, of such elements which affect the hardenability, mechanical properties and
applicability of the steel.
4.2 Product analysis
The product analysis shall not deviate from the specified cast analysis (see Table 1) by more than the
values specified in EN ISO 683-1:2018, Table 4 (see EN 10250-1:2022, 9.2).
5 Heat treatment
Heat treatment details are given in Table A.1 for guidance.
6 Mechanical properties
6.1 Forgings in the normalized, normalized and tempered, and quenched and tempered
condition
The mechanical properties determined on test pieces selected, prepared and tested in accordance with
EN 10250-1:2022, Clauses 11 and 12 shall conform to the property requirements gi
...