EN 4627:2022
(Main)Aerospace series - Steel X4CrNiMo16-5-1 (1.4418) - Air melted - Hardened and tempered - Forgings - De ≤ 200 mm - 1 150 MPa ≤ Rm ≤ 1 300 MPa
Aerospace series - Steel X4CrNiMo16-5-1 (1.4418) - Air melted - Hardened and tempered - Forgings - De ≤ 200 mm - 1 150 MPa ≤ Rm ≤ 1 300 MPa
This document specifies the requirements relating to:
Steel X4CrNiMo16-5-1 (1.4418)
Air melted
Hardened and tempered
Forgings
De ≤ 200 mm
1 150 MPa ≤ Rm ≤ 1 300 MPa
for aerospace applications.
NOTE Other common designations:
- AIR: Z 8 CND 17-04.
- Only the chemical composition according to this document is considered.
Luft- und Raumfahrt - Stahl X4CrNiMo16 5 1 (1.4418) - Lufterschmolzen - Gehärtet und angelassen - Schmiedestücke - De ≤ 200 mm - 1 150 MPa ≤ Rm ≤ 1 300 MPa
Dieses Dokument legt die Anforderungen an:
Stahl X4CrNiMo16 5 1 (1.4418)
lufterschmolzen
gehärtet und angelassen
Schmiedestücke
De ≤ 200 mm
1 150 MPa ≤ Rm ≤ 1 300 MPa
für Anwendungen in der Luft und Raumfahrt fest.
ANMERKUNG Weitere übliche Bezeichnungen:
AIR: Z 8 CND 17 04.
Es wird nur die chemische Zusammensetzung nach diesem Dokument berücksichtigt.
Série aérospatiale - Acier X4CrNiMo16-5-1 (1.4418) - Élaboré à l'air - Trempé et revenu - Pièces forgées ou matricées - De ≤ 200 mm - 1 150 MPa ≤ Rm ≤ 1 300 MPa
Le présent document spécifie les exigences relatives à :
Acier X4CrNiMo16-5-1 (1.4418)
Élaboré à l’air
Trempé et revenu
Pièces forgées ou matricées
De ≤ 200 mm
1 150 MPa ≤ Rm ≤ 1 300 MPa
pour les applications aérospatiales.
NOTE Autres désignations communes :
- AIR : Z 8 CND 17-04.
- Seule la composition chimique selon le présent document est prise en compte.
Aeronavtika - Jeklo X4CrNiMo16-5-1 (1.4418) - Taljeno - Utrjeno in mehko žarjeno - Izkovki - De ≤ 200 mm - 1150 MPa ≤ Rm ≤ 1300 MPa
Ta dokument določa zahteve, ki se navezujejo na:
jeklo X4CrNiMo16-5-1 (1.4418),
taljeno,
utrjeno in mehko žarjeno,
izkovke,
De ≤ 200 mm,
1150 MPa ≤ Rm ≤ 1300 MPa,
za uporabo v aeronavtiki.
OPOMBA: Druge pogoste oznake:
– AIR: Z 8 CND 17-04.
– Upošteva se le kemijska sestava v skladu s tem dokumentom.
General Information
- Status
- Published
- Publication Date
- 20-Dec-2022
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 4/S 3 - Steels & Heat Resisting Alloys
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 21-Dec-2022
- Completion Date
- 21-Dec-2022
Relations
- Effective Date
- 11-Dec-2018
Overview
EN 4627:2022 (CEN) is a European aerospace material standard that specifies requirements for the stainless steel grade X4CrNiMo16‑5‑1 (1.4418) in the form of air‑melted, hardened and tempered forgings with a maximum dimension De ≤ 200 mm and a tensile strength Rm between 1 150 MPa and 1 300 MPa. The document defines metallurgy, heat treatment, mechanical properties, inspection and acceptance criteria tailored for aerospace applications. Note: other common designation - AIR: Z 8 CND 17‑04.
Key topics and technical requirements
- Material designation and chemistry: The standard fixes the chemical composition for X4CrNiMo16‑5‑1 (1.4418); only the composition given in the standard applies.
- Melting and form: Material must be air melted and supplied as forgings (forged from EN 4629 forging stock).
- Size limit: Applicable to forgings with external dimension De ≤ 200 mm.
- Heat treatment: Typical cycle specified as austenitizing at 1 010 °C – 1 060 °C (PQ, OQ or WQ) followed by tempering at either 375–405 °C or 480–550 °C; air quenching allowed for De ≤ 20 mm.
- Mechanical properties: Representative acceptance levels include Rm 1 150–1 300 MPa, Rp0.2 ≥ 900 MPa (where required), and specified elongation minima (e.g., A ≥ 14 % for some test conditions).
- Hardness and toughness: Hardened & tempered hardness ranges (typical HBW 341–401); impact energy minimums and notch directions are specified depending on test piece and condition.
- Microstructure & quality controls: Limits on δ‑ferrite (≤5 %) and retained austenite (≤10 %); inclusion Category 2; grain size requirement (G ≥ 5); ultrasonic acceptance Class 2 for internal defects; macrographic and visual inspection requirements.
- Testing & inspection: Referenced test methods include EN 4700‑006 for forging production and inspection, EN 4050‑4 (UT), EN 2950/2951 (macro/micro), and EN ISO 643 (grain size).
Applications and users
EN 4627:2022 is intended for manufacturers, purchasers and quality engineers in the aerospace and defence supply chain who specify or produce high‑strength stainless steel forgings. Typical users include:
- Aerospace OEMs and tier‑1 suppliers specifying material for highly stressed forged components
- Forging houses and heat‑treaters producing aerospace forgings to contractual specification
- Metallurgists, materials engineers and inspection/QA teams responsible for acceptance testing and certification
Related standards
- EN 4629 (forging stock for this steel)
- EN 4700‑006 (technical specification for forgings)
- EN 4050‑4, EN 2950, EN 2951, EN ISO 643
- EN 4258 and EN 4500‑005 (series organization and drafting rules)
EN 4627:2022 helps ensure consistent, high‑strength stainless steel forgings for critical aerospace applications by combining defined chemistry, heat treatment windows and rigorous inspection criteria.
Frequently Asked Questions
EN 4627:2022 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Steel X4CrNiMo16-5-1 (1.4418) - Air melted - Hardened and tempered - Forgings - De ≤ 200 mm - 1 150 MPa ≤ Rm ≤ 1 300 MPa". This standard covers: This document specifies the requirements relating to: Steel X4CrNiMo16-5-1 (1.4418) Air melted Hardened and tempered Forgings De ≤ 200 mm 1 150 MPa ≤ Rm ≤ 1 300 MPa for aerospace applications. NOTE Other common designations: - AIR: Z 8 CND 17-04. - Only the chemical composition according to this document is considered.
This document specifies the requirements relating to: Steel X4CrNiMo16-5-1 (1.4418) Air melted Hardened and tempered Forgings De ≤ 200 mm 1 150 MPa ≤ Rm ≤ 1 300 MPa for aerospace applications. NOTE Other common designations: - AIR: Z 8 CND 17-04. - Only the chemical composition according to this document is considered.
EN 4627:2022 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 4627:2022 has the following relationships with other standards: It is inter standard links to EN 4627:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 4627:2022 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-marec-2023
Nadomešča:
SIST EN 4627:2014
Aeronavtika - Jeklo X4CrNiMo16-5-1 (1.4418) - Taljeno - Utrjeno in mehko žarjeno -
Izkovki - De ≤ 200 mm - 1150 MPa ≤ Rm ≤ 1300 MPa
Aerospace series - Steel X4CrNiMo16-5-1 (1.4418) - Air melted - Hardened and
tempered - Forgings - De ≤ 200 mm - 1 150 MPa ≤ Rm ≤ 1 300 MPa
Luft- und Raumfahrt - Stahl X4CrNiMo16-5-1 (1.4418) - Lufterschmolzen - Gehärtet- und
angelassen - Schmiedestücke - De ≤ 200 mm - 1 150 MPa ≤ Rm ≤ 1 300 MPa
Série aérospatiale - Acier X4CrNiMo16-5-1 (1.4418) - Élaboré à l'air - Trempé et revenu
- Pièces forgées ou matricées - De ≤ 200 mm - 1 150 MPa ≤ Rm ≤ 1 300 MPa
Ta slovenski standard je istoveten z: EN 4627:2022
ICS:
49.025.10 Jekla 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.
EN 4627
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2022
EUROPÄISCHE NORM
ICS 49.025.10 Supersedes EN 4627:2014
English Version
Aerospace series - Steel X4CrNiMo16-5-1 (1.4418) - Air
melted - Hardened and tempered - Forgings - D ≤ 200 mm
e
- 1 150 MPa ≤ R ≤ 1 300 Mpa
m
Série aérospatiale - Acier X4CrNiMo16-5-1 (1.4418) - Luft- und Raumfahrt - Stahl X4CrNiMo16-5-1 (1.4418)
Élaboré à l'air - Trempé et revenu - Pièces forgées ou - Lufterschmolzen - Gehärtet- und angelassen -
matricées - De ≤ 200 mm - 1 150 MPa ≤ Rm ≤ 1 300 MPa Schmiedestücke - De ≤ 200 mm - 1 150 MPa ≤ Rm ≤ 1
300 MPa
This European Standard was approved by CEN on 22 August 2022.
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 NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4627:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Requirements . 6
Bibliography . 10
European foreword
This document (EN 4627:2022) has been prepared by the Aerospace and Defence Industries
Association of Europe — Standardization (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, 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 June 2023, and conflicting national standards shall be withdrawn at
the latest by June 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN 4627:2014.
This document is a technical revision of EN 4627:2014.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this document: 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 the United
Kingdom.
Introduction
This document is part of the series of EN metallic material standards for aerospace applications.
The general organization of this series is described in EN 4258.
This document has been prepared in accordance with EN 4500-005.
1 Scope
This doc
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