Aerospace series - Steel X5CrNiCu17-4 (1.4542) - Air melted - Solution treated and precipitation treated - Bars - a or D ≤ 200 mm - Rm ≥ 930 MPa

This document specifies the requirements relating to:
Steel X5CrNiCu17-4 (1.4542)
Air melted
Solution treated and precipitation treated
Bars
a or D ≤ 200 mm
Rm ≥ 930 MPa
for aerospace applications.
W.nr: 1.4542.
ASD-STAN: FE-PM3801.

Luft- und Raumfahrt - Stahl X5CrNiCu17-4 (1.4542) - Lufterschmolzen - Lösungsgeglüht und ausgehärtet - Stangen - a oder D ≤ 200 mm - Rm ≥ 930 MPa

Dieses Dokument legt die Anforderungen an:
Stahl X5CrNiCu17 4 (1.4542)
Lufterschmolzen
Lösungsgeglüht und ausscheidungsgehärtet
Stangen
a oder D ≤ 200 mm
Rm ≥ 930 MPa
für Anwendungen in der Luft- und Raumfahrt fest.
Werkstoffnummer: 1.4542.
ASD-STAN-Bezeichnung: FE-PM3801.

Série aérospatiale - Acier X5CrNiCu17-4 (1.4542) - Élaboré à l'air - Mis en solution et précipité - Barres - a ou D ≤ 200 mm - Rm ≥ 930 MPa

Le présent document spécifie les exigences relatives à :
Acier X5CrNiCu17-4 (1.4542)
Élaboré à l'air
Mis en solution et précipité
Barres
a ou D ≤ 200 mm
Rm ≥ 930 MPa
pour les applications aérospatiales.
W.nr : 1.4542.
ASD-STAN : FE-PM3801.

Letalska serija - Jeklo X5CrNiCu17-4 (1.4542) - Taljeno na zraku - Raztopinsko obdelano in oborinsko utrjeno - Palice - a ali D ≤ 200 mm - Rm ≥ 930 MPa

Ta dokument določa zahteve, ki se nanašajo na:
Jeklo X5CrNiCu17-4 (1.4542)
Taljeno na zraku
Raztopinsko obdelano in starano
Palice
a ali D ≤ 200 mm
Rm ≥ 930 MPa
za letalske aplikacije.
W.nr: 1.4542.
ASD-STAN: FE-PM3801.

General Information

Status
Published
Public Enquiry End Date
04-Sep-2024
Publication Date
17-Jun-2026
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
10-Jun-2026
Due Date
15-Aug-2026
Completion Date
18-Jun-2026

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27-May-2026
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27-May-2026
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Effective Date
27-May-2026

Overview

SIST EN 3161:2026 defines the requirements for steel X5CrNiCu17-4 (material number 1.4542) used in aerospace applications. This standard specifies steel bars that are air melted, solution treated, and precipitation treated, with cross-sections (a or D) less than or equal to 200 mm and a minimum ultimate tensile strength (Rm) of 930 MPa. The document, prepared by SIST and based on ASD-STAN recommendations, ensures high performance and consistency for metallic materials applied in aerospace environments, providing clarity on production, testing, and quality assurance.

Key Topics

  • Material Specification:
    • Covers X5CrNiCu17-4 stainless steel (1.4542), also identified as 17-4 PH, known for its high strength and corrosion resistance.
    • Specifies air-melted production and subsequent heat treatment for optimal mechanical properties.
  • Product Form:
    • Applies to round, square, or rectangular bars with dimensions up to 200 mm.
  • Heat Treatment:
    • Bars are solution treated and precipitation hardened to achieve the required mechanical properties.
  • Mechanical Properties:
    • Specifies a minimum ultimate tensile strength (Rm) of 930 MPa.
    • Requirements for proof stress, elongation, reduction of area, and hardness are also established.
  • Quality Assurance:
    • Mandates rigorous non-destructive testing, including ultrasonic and visual inspection for internal and external imperfections.
    • Includes limits on δ-ferrite content and specifies grain size requirements.
  • Testing Procedures:
    • References established test methods for mechanical properties and microstructure control.

Applications

Steel X5CrNiCu17-4 per SIST EN 3161:2026 is widely used in aerospace engineering where high strength, excellent toughness, and good corrosion resistance are essential. Typical applications include:

  • Aircraft structural components subjected to high loads
  • Engine parts and fasteners exposed to demanding conditions
  • Landing gear and actuator mechanisms
  • Aerospace tooling and ground support equipment

By adhering to this standard, manufacturers deliver consistent, high-quality bars meeting the stringent safety and performance requirements of the aerospace sector.

Related Standards

For comprehensive quality and compatibility, SIST EN 3161:2026 references and aligns with several other European standards for metallic materials:

  • EN 2043 - Aerospace series: General requirements for semi-finished product qualification (excluding forgings and castings).
  • EN 4436 - Aerospace series: Test methods for determination of δ-ferrite content.
  • EN 4700-002 - Aerospace series: Technical specifications for steel and heat-resisting alloy wrought products, specifically for bars and sections.
  • EN 4258 - General organization of standardization for metallic materials in aerospace applications.
  • EN 4500 series - Guidelines for drafting and presenting material standards, including specific rules for steels.

Adopting SIST EN 3161:2026 ensures compliance with current European norms for aerospace stainless steel bars, supporting supply chain reliability and regulatory acceptance.


By following SIST EN 3161:2026 and its related standards, organizations contribute to safer, more efficient aircraft manufacturing, maintenance, and operation, emphasizing the critical role of material standardization in aerospace quality assurance and innovation.

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Frequently Asked Questions

SIST EN 3161:2026 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Steel X5CrNiCu17-4 (1.4542) - Air melted - Solution treated and precipitation treated - Bars - a or D ≤ 200 mm - Rm ≥ 930 MPa". This standard covers: This document specifies the requirements relating to: Steel X5CrNiCu17-4 (1.4542) Air melted Solution treated and precipitation treated Bars a or D ≤ 200 mm Rm ≥ 930 MPa for aerospace applications. W.nr: 1.4542. ASD-STAN: FE-PM3801.

This document specifies the requirements relating to: Steel X5CrNiCu17-4 (1.4542) Air melted Solution treated and precipitation treated Bars a or D ≤ 200 mm Rm ≥ 930 MPa for aerospace applications. W.nr: 1.4542. ASD-STAN: FE-PM3801.

SIST EN 3161:2026 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 3161:2026 has the following relationships with other standards: It is inter standard links to SIST EN 4613:2009, SIST EN 4614:2009, SIST EN 4854-1:2020, SIST EN 4613:2021, SIST EN 4538-003:2011, SIST EN 4632-004:2014, SIST EN 6029:2017, SIST EN 4265:2014, SIST EN 4854-2:2020, SIST EN 4614:2021, SIST EN 4040:2009, SIST EN 6097:2019, SIST EN 2287:2022, SIST EN 2584:2019, SIST EN 4266:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 3161:2026 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-julij-2026
Aeronavtika - Jeklo X5CrNiCu17-4 (1.4542) - Taljeno - Topilno žarjeno in
izločevalno utrjeno - Palice - a ali D ≤ 200 mm - Rm ≥ 930 MPa
Aerospace series - Steel X5CrNiCu17-4 (1.4542) - Air melted - Solution treated and
precipitation treated - Bars - a or D ≤ 200 mm - Rm ≥ 930 MPa
Luft- und Raumfahrt - Stahl X5CrNiCu17-4 (1.4542) - Lufterschmolzen - Lösungsgeglüht
und ausgehärtet - Stangen - a oder D ≤ 200 mm - Rm ≥ 930 MPa
Série aérospatiale - Acier X5CrNiCu17-4 (1.4542) - Élaboré à l'air - Mis en solution et
précipité - Barres - a ou D ≤ 200 mm - Rm ≥ 930 MPa
Ta slovenski standard je istoveten z: EN 3161:2026
ICS:
49.025.10 Jekla Steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 3161
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2026
EUROPÄISCHE NORM
ICS 49.025.10 Supersedes EN 3161:2007
English Version
Aerospace series - Steel X5CrNiCu17-4 (1.4542) - Air
melted - Solution treated and precipitation treated - Bars -
a or D  200 mm - Rm  930 MPa
Série aérospatiale - Acier X5CrNiCu17-4 (1.4542) - Luft- und Raumfahrt - Stahl X5CrNiCu17-4 (1.4542) -
Élaboré à l'air - Mis en solution et précipité - Barres - a Lufterschmolzen - Lösungsgeglüht und
ou D  200 mm - Rm  930 MPa ausscheidungsgehärtet - Stangen - a oder D  200 mm -
Rm  930 MPa
This European Standard was approved by CEN on 13 April 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 3161:2026 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 3161:2026) 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 November 2026, and conflicting national standards shall be
withdrawn at the latest by November 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 3161:2007.
— update of the material designation;
— correction of the format of Table 1 to comply with the requirements of the EN 4500 series;
— update of Clause 2;
— addition of a bibliography;
— modification of Table 1, line 9, “a or D ≤ 150” with “a or D ≤ 200”.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bo
...