EN 2540:2018
(Main)Aerospace series - Steel X7CrNiAl17-7 (1.4568) - Air melted - Solution treated and precipitation hardened - Sheet and strip - a ≤ 6 mm - 1 240 MPa ≤ Rm ≤ 1 450 MPa
General Information
- Abstract
This European Standard specifies the requirements relating to:
Steel X7CrNiAl17-7 (1.4568)
Air melted
Solution treated and precipitation hardened
Sheet and strip
a ≤ 6 mm
1 240 MPa ≤ Rm ≤ 1 450 MPa
for aerospace applications.
- Status
- Published
- Publication Date
- 31-Jul-2018
- Withdrawal Date
- 27-Feb-2019
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 4 - Metallic
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 21-Jan-2024
- Completion Date
- 23-Sep-2026
Overview
EN 2540:2018 is a CEN European Standard (Aerospace series) that defines material and delivery requirements for Steel X7CrNiAl17-7 (1.4568) in the form of air‑melted, cold‑rolled sheet and strip for aerospace applications. The standard covers sheet/strip up to a ≤ 6 mm thickness with a specified tensile strength Rm between 1 240 MPa and 1 450 MPa, and sets chemical composition, heat‑treatment delivery conditions and inspection/qualification links for use in aviation and defence industries.
Key topics and technical requirements
- Material designation: Steel X7CrNiAl17-7 (1.4568).
- Melting and production: Air melted; produced as cold‑rolled sheet and strip.
- Form and limits: Sheet and strip with thickness a ≤ 6 mm.
- Mechanical strength: Tensile strength (Rm) specified 1 240 MPa ≤ Rm ≤ 1 450 MPa.
- Heat treatment / delivery conditions:
- Delivery condition: Solution treated (delivery condition code W).
- Use condition: Solution treated and precipitation hardened (final condition for delivery/use). Heat‑treatment details are specified in the standard.
- Chemical composition (typical limits as given): C ≤ 0.09%; Si ≤ 1.00%; Mn ≤ 1.00%; P ≤ 0.040%; S ≤ 0.030%; Cr 16.0–18.0%; Ni ~6.50–7.75%; Al ~1.50%; Cu ≤ 0.50%; Fe base.
- Hardness: Hardness requirements are specified (reference values given in the standard; e.g. ~229 HV / ~38 HRC equivalence indicated).
- Testing and inspection: Test sample and test piece rules refer to EN 4700‑001; product qualification is to follow EN 2043 with agreement between manufacturer and purchaser.
Applications and users
EN 2540:2018 is intended for professionals who specify, procure, produce or inspect high‑strength aerospace metallic materials:
- Aerospace materials engineers and designers selecting sheet/strip for structural or highly stressed components.
- Procurement and quality assurance teams verifying supplier compliance and delivery conditions.
- Manufacturers and processors of cold‑rolled aerospace steels who must apply solution treatment and precipitation hardening.
- Certification bodies and test laboratories performing mechanical and metallurgical verification per referenced EN requirements.
Related standards
- EN 4700‑001 - Technical specification for plate, sheet and strip (wrought steels).
- EN 2043 - General requirements for semi‑finished product qualification.
- EN 4258 - Organization of aerospace metallic material standards.
- EN 4500‑005 - Rules for drafting/presentation of steel material standards.
- ASD‑STAN / CEN - standardization bodies responsible for approval and national implementation.
EN 2540:2018 ensures consistent material quality, traceability and heat‑treatment control for aerospace-grade X7CrNiAl17‑7 sheet and strip - essential for designers and suppliers requiring high tensile strength and controlled precipitation‑hardening behavior.
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
EN 2540:2018 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Steel X7CrNiAl17-7 (1.4568) - Air melted - Solution treated and precipitation hardened - Sheet and strip - a ≤ 6 mm - 1 240 MPa ≤ Rm ≤ 1 450 MPa". This standard covers: This European Standard specifies the requirements relating to: Steel X7CrNiAl17-7 (1.4568) Air melted Solution treated and precipitation hardened Sheet and strip a ≤ 6 mm 1 240 MPa ≤ Rm ≤ 1 450 MPa for aerospace applications.
This European Standard specifies the requirements relating to: Steel X7CrNiAl17-7 (1.4568) Air melted Solution treated and precipitation hardened Sheet and strip a ≤ 6 mm 1 240 MPa ≤ Rm ≤ 1 450 MPa for aerospace applications.
EN 2540:2018 is classified under the following ICS (International Classification for Standards) categories: 49.025.10 - Steels. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 2540:2018 has the following relationships with other standards: It is inter standard links to EN 4500-005:2024, EN 2043:2013, EN 4258:2024, EN 4700-001:2025, EN 2590:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 2540:2018 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.49.025.10JeklaSteelsICS:Ta slovenski standard je istoveten z:EN 2540:2018SIST EN 2540:2018en,fr,de01-oktober-2018SIST EN 2540:2018SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2540
August
t r s z ICS
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v w r MPaÉlaboré à l 5air æ Mis en solution et durci par précipitation æ Tôles et bande æ a ≤
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egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
t w v rã t r s z ESIST EN 2540:2018
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