SIST EN 4216:2026
(Main)Aerospace series - Steel GX5CrNiCuNb16-4 (1.4525) - Homogenized, solution treated and precipitation hardened - Investment casting - De ≤ 50 mm - Rm ≥ 900 MPa
Aerospace series - Steel GX5CrNiCuNb16-4 (1.4525) - Homogenized, solution treated and precipitation hardened - Investment casting - De ≤ 50 mm - Rm ≥ 900 MPa
This document specifies the requirements relating to:
Steel GX5CrNiCuNb16-4 (1.4525)
Homogenized
Solution treated and precipitation hardened
Investment casting
De ≤ 50 mm
Rm ≥ 900 MPa
for aerospace applications.
ASD-STAN designation FE-CM3801
Material number 1.4525
Luft- und Raumfahrt - Stahl GX5CrNiCuNb16-4 (1.4525) - Diffusionsgeglüht, lösungsgeglüht und ausscheidungsgehärtet - Feingussstücke - De ≤ 50 mm - Rm ≥ 900 MPa
Dieses Dokument legt die Anforderungen an:
Stahl GX5CrNiCuNb16 4 (1.4525)
Diffusionsgeglüht
Lösungsgeglüht und ausscheidungsgehärtet
Feingussstücke
De ≤ 50 mm
Rm ≥ 900 MPa
für Anwendungen in der Luft und Raumfahrt fest.
ASD-STAN-Bezeichnung: FE-CM3801
Werkstoffnummer: 1.4525
Série aérospatiale - Acier GX5CrNiCuNb16-4 (1.4525) - Homogénéisé, mis en solution et durci par précipitation - Pièces moulées à la cire perdue - De ≤ 50 mm - Rm ≥ 900 MPa
Le présent document spécifie les exigences relatives à :
Série aérospatiale - Acier GX5CrNiCuNb16-4 (1.4525)
Homogénéisé
Mis en solution et durci par précipitation
Pièces moulées à la cire perdue
De ≤ 50 mm
Rm ≥ 900 MPa
pour les applications aérospatiales.
Désignation ASD-STAN : FE-CM3801
Numéro de matériau : 1.4525
Aeronavtika - Jeklo GX5CrNiCuNb16-4 (1.4525) - Homogenizirani, obdelani v raztopini in utrjeni - Precizijsko litje - De ≤ 50 mm - Rm ≥ 900 MPa
Ta dokument določa zahteve v zvezi z:
Jeklo GX5CrNiCuNb16-4 (1.4525)
Homogenizirano
Raztopinsko obdelano in utrjeno s precipitacijo
Natančno litje
De ≤ 50 mm
Rm ≥ 900 MPa
za letalske aplikacije.
ASD-STAN oznaka FE-CM3801
Materialna številka 1.4525
General Information
- Status
- Published
- Public Enquiry End Date
- 25-Jun-2025
- Publication Date
- 07-May-2026
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 04-May-2026
- Due Date
- 09-Jul-2026
- Completion Date
- 08-May-2026
Relations
- Effective Date
- 19-Jan-2023
Overview
SIST EN 4216:2026 defines the requirements for the aerospace-grade steel alloy GX5CrNiCuNb16-4 (1.4525), specifically in its homogenized, solution treated, and precipitation hardened condition. The standard applies to investment castings with external dimensions up to 50 mm and a minimum tensile strength (Rm) of 900 MPa. This document is part of the European standardization efforts for high-performance metallic materials used in aerospace applications, ensuring reliable, consistent properties in safety-critical components.
Key Topics
Material Specification:
GX5CrNiCuNb16-4 (1.4525) is a stainless steel alloy known for its strength and corrosion resistance. The standard details both chemical composition and mechanical requirements for the material.Heat Treatment:
The specification covers homogenization, solution treatment, and precipitation hardening processes. Strict controls on these treatments are crucial for achieving the specified mechanical properties.Investment Casting:
The standard applies to cast parts produced by investment casting (precision casting), a manufacturing method valued in aerospace for producing complex shapes with high dimensional accuracy.Dimensional and Mechanical Limits:
- Applicable for external diameters (De) up to 50 mm.
- Minimum required tensile strength (Rm) of 900 MPa, with other properties such as proof stress, elongation, and hardness also defined.
Testing and Inspection:
Comprehensive requirements exist for mechanical testing, microstructure (including δ-ferrite content), and non-destructive examination techniques like ultrasonic testing and visual inspection.
Applications
SIST EN 4216:2026 is crucial for manufacturers, suppliers, and engineers in the aerospace field who require high strength, corrosion-resistant components produced via investment casting. Typical applications include:
Aerospace Structural Parts:
Components subjected to high loads where strength and reliability are essential, such as brackets, mounting components, and control fittings.Engine Parts:
Suitable for investment cast turbine parts, compressor components, and other engine elements demanding consistent quality and mechanical performance.Precision Aerospace Components:
Complex-shaped cast parts that benefit from the precision and repeatability of the investment casting process.Safety-Critical Assemblies:
Utilized where meeting strict mechanical criteria is imperative for airworthiness certification.
Related Standards
Several related standards provide complementary frameworks for metallic materials and aerospace castings:
- EN 2103-3: Technical specifications for remelting stock and castings, relevant for production procedures and testing.
- EN 3484: Covers requirements for a similar precipitation-hardened steel alloy and reference heat treatment processes.
- EN 4436: Describes test methods for determining δ-ferrite content, important for ensuring correct microstructural properties.
- EN 4258: Offers an overview of aerospace metallic material standards and their organization.
- EN 4500-005: Outlines rules for drafting and presentation of steel material standards.
Practical Value
Adherence to SIST EN 4216:2026 enables:
Consistent Quality:
Ensures repeatable, verifiable properties in aerospace components, supporting safety and performance requirements.Regulatory Compliance:
Assists manufacturers and operators in meeting European and global aerospace certification standards.Efficient Supply Chain Integration:
Provides clear expectations for suppliers and customers, streamlining procurement and qualification of investment cast parts.Enhanced Safety:
By mandating thorough testing and standardized processing, the risk of in-service failure is minimized, elevating overall aircraft safety.
By following SIST EN 4216:2026, the aerospace industry can confidently specify, manufacture, and utilize investment cast components with proven reliability and performance.
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Frequently Asked Questions
SIST EN 4216:2026 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Steel GX5CrNiCuNb16-4 (1.4525) - Homogenized, solution treated and precipitation hardened - Investment casting - De ≤ 50 mm - Rm ≥ 900 MPa". This standard covers: This document specifies the requirements relating to: Steel GX5CrNiCuNb16-4 (1.4525) Homogenized Solution treated and precipitation hardened Investment casting De ≤ 50 mm Rm ≥ 900 MPa for aerospace applications. ASD-STAN designation FE-CM3801 Material number 1.4525
This document specifies the requirements relating to: Steel GX5CrNiCuNb16-4 (1.4525) Homogenized Solution treated and precipitation hardened Investment casting De ≤ 50 mm Rm ≥ 900 MPa for aerospace applications. ASD-STAN designation FE-CM3801 Material number 1.4525
SIST EN 4216:2026 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.
SIST EN 4216:2026 has the following relationships with other standards: It is inter standard links to SIST EN 4216:2007. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 4216:2026 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)
SLOVENSKI STANDARD
01-junij-2026
Aeronavtika - Jeklo GX5CrNiCuNb16-4 (1.4525) - Homogenizirani, obdelani v
raztopini in utrjeni - Precizijsko litje - De ≤ 50 mm - Rm ≥ 900 MPa
Aerospace series - Steel GX5CrNiCuNb16-4 (1.4525) - Homogenized, solution treated
and precipitation hardened - Investment casting - De ≤ 50 mm - Rm ≥ 900 MPa
Luft- und Raumfahrt - Stahl GX5CrNiCuNb16-4 (1.4525) - Diffusionsgeglüht,
lösungsgeglüht und ausscheidungsgehärtet - Feingussstücke - De ≤ 50 mm - Rm ≥ 900
MPa
Série aérospatiale - Acier GX5CrNiCuNb16-4 (1.4525) - Homogénéisé, mis en solution
et durci par précipitation - Pièces moulées à la cire perdue - De ≤ 50 mm - Rm ≥ 900
MPa
Ta slovenski standard je istoveten z: EN 4216:2026
ICS:
49.025.10 Jekla Steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 4216
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2026
EUROPÄISCHE NORM
ICS 49.025.10 Supersedes EN 4216:2007
English Version
Aerospace series - Steel GX5CrNiCuNb16-4 (1.4525) -
Homogenized, solution treated and precipitation hardened
- Investment casting - De 50 mm - Rm 900 MPa
Série aérospatiale - Acier GX5CrNiCuNb16-4 (1.4525) - Luft- und Raumfahrt - Stahl GX5CrNiCuNb16-4
Homogénéisé - Mis en solution et durci par (1.4525) - Diffusionsgeglüht, lösungsgeglüht und
précipitation - Moulage à la cire perdue - De 50 mm - ausscheidungsgehärtet - Feingussstücke - De 50 mm -
Rm 900 MPa Rm 900 MPa
This European Standard was approved by CEN on 6 March 2026.
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, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4216:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements . 5
Bibliography . 9
European foreword
This document (EN 4216:2026) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document shall be given the status of a national standard, either by publication of an identical text
or by endorsement, at the latest by October 2026, and conflicting national standards shall be withdrawn
at the latest by October 2026.
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 4216:2007.
— editorial revision;
— the titles have been updated;
— addition of a bibliography.
According to the CEN-CENELEC Internal
...