kSIST FprEN 4216:2025
(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
General Information
- Status
- Not Published
- Public Enquiry End Date
- 25-Jun-2025
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 5020 - Formal vote (FV) (Adopted Project)
- Start Date
- 19-Dec-2025
- Due Date
- 06-Feb-2026
- Completion Date
- 19-Dec-2025
Relations
- Effective Date
- 19-Jan-2023
Overview
The kSIST FprEN 4216:2025 standard, titled Aerospace series - Steel GX5CrNiCuNb16-4 (1.4525) - Homogenized, solution treated and precipitation hardened - Investment casting - De ≤ 50 mm - Rm ≥ 900 MPa, is a European draft standard prepared by CEN under the ASD-STAN technical committee. This standard specifies requirements for high-performance steel using investment casting methods with precise heat treatments for aerospace applications. It supersedes the previous EN 4216:2007 with technical and editorial updates.
This steel grade, designated GX5CrNiCuNb16-4 (material number 1.4525), undergoes homogenization, solution treatment, and precipitation hardening to achieve a tensile strength of Rm ≥ 900 MPa. The standard targets parts with an effective diameter (De) of up to 50 mm, ensuring materials meet stringent quality and mechanical property criteria vital for aerospace structural components.
Key Topics
- Material Grade: Steel GX5CrNiCuNb16-4 (1.4525), known for excellent strength and corrosion resistance due to its unique composition including chromium, nickel, copper, and niobium.
- Manufacturing Process: Investment casting from remelting stock, allowing complex geometries and high dimensional precision.
- Heat Treatment: Homogenized, solution treated, and precipitation hardened to enhance mechanical properties such as tensile strength, elongation, and hardness.
- Mechanical Properties:
- Tensile Strength (Rm) ≥ 900 MPa
- Proof Stress (Rp0.2) ≥ 830 MPa
- Hardness ≥ 30 HRC
- Minimum elongation 6-8%, ensuring toughness and ductility.
- Dimensional Limits: Parts with external diameters up to 50 mm (De ≤ 50 mm).
- Testing and Inspection:
- Visual Testing (VT) for external imperfections.
- Ultrasonic Testing (UT) for internal defects.
- Microstructure inspection to ensure δ-ferrite content ≤ 15%.
- Comprehensive delivery conditions and sample testing are specified under EN 2103-3 technical specifications.
Applications
This standard applies primarily to critical aerospace components that demand:
- High Strength and Durability: Ideal for structural parts in aircraft engines and airframes where mechanical integrity under stress is crucial.
- Corrosion Resistance: Suitable for aerospace environments exposed to variable temperatures and corrosive agents.
- Complex Geometries: Investment casting enables the production of precision parts with complex shapes that would be difficult to machine.
- Heat-resistant applications: Precipitation hardening improves performance at elevated temperatures common in aerospace components.
Typical uses include turbine blades, compressor parts, structural fittings, and other load-bearing aerospace hardware requiring reliable mechanical properties combined with lightweight and corrosion resistance.
Related Standards
- EN 2103-3: Aerospace series – Steel, nickel base and cobalt base alloy remelting stock and castings – Technical specifications for production and pre-production castings.
- EN 3484: Aerospace series – Steel X5CrNiCuNb16-4 – As cast – Reference heat treatments.
- EN 4436: Aerospace series – Steel – Test methods including δ-ferrite content determination to control microstructure quality.
- EN 4258: General organization of aerospace metallic materials standardization, describing the framework for aerospace material standards.
- EN 4500-005: Rules for drafting and presentation of aerospace metallic materials standards, including specific guidelines for steel materials.
Keywords: Aerospace steel standard, GX5CrNiCuNb16-4 steel, investment casting aerospace, precipitation hardened steel, homogenized steel standard, aerospace material specification, high tensile steel, EN 4216, CEN aerospace standards, steel for aerospace components, heat treatment steel aerospace.
Frequently Asked Questions
kSIST FprEN 4216:2025 is a draft 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
kSIST FprEN 4216:2025 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.
kSIST FprEN 4216:2025 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.
kSIST FprEN 4216:2025 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
oSIST prEN 4216:2025
01-junij-2025
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: prEN 4216
ICS:
49.025.10 Jekla Steels
oSIST prEN 4216:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 4216:2025
oSIST prEN 4216:2025
DRAFT
EUROPEAN STANDARD
prEN 4216
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2025
ICS 49.025.10 Will supersede EN 4216:2007
English Version
Aerospace series - Steel GX5CrNiCuNb16-4 (1.4525) -
Homogenized, solution treated and precipitation hardened
- Investment casting - D ≤ 50 mm - R ≥ 900 MPa
e m
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 - Pièces moulées à la cire perdue - D ≤ ausscheidungsgehärtet - Feingussstücke - D ≤ 50 mm -
e e
50 mm - R ≥ 900 MPa R ≥ 900 MPa
m m
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
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 NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4216:2025 E
worldwide for CEN national Members.
oSIST prEN 4216:2025
prEN 4216:2025 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Requirements . 4
Bibliography . 8
oSIST prEN 4216:2025
prEN 4216:2025 (E)
European foreword
This document (prEN 4216:2025) 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
...
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