SIST EN 3484:2020

Aerospace series - Steel FE-CM61 - As cast - Reference heat treatment: homogenised, solution treated, precipitation hardened and sub zero - Remelting stock

This document specifies the requirements relating to:
Steel X5CrNiCuNb16-4 (1.4549 type 1.4542)
As cast
Reference heat treatment:
homogenised, solution treated, precipitation hardened and sub zero
Remelting stock
for aerospace applications.
ASD-STAN designation: FE-CM61.

Luft- und Raumfahrt - Stahl FE-CM61 - Gegossen - Referenz wärmbehandlung: diffusionsgeglüht, losungsgeglüht, ausgehärtet und tieftemperaturbehandelt - Guss vor material

Dieses Dokument legt die Anforderungen an:
Stahl X5CrNiCuNb16-4 (1.4549 Typ 1.4542)
gegossen
Referenz Wärmebehandlung:
diffusionsgeglüht, lösungsgeglüht, ausscheidungsgehärtet und tieftemperaturbehandelt
Vormaterial
für Anwendungen in der Luft  und Raumfahrt fest.
ASD STAN Bezeichnung: FE CM61.

Série aérospatiale - Acier FE-CM61 - Coulé - Traitement hermique de référence : homogénéisé, mis en solution, durci par précipitation et traité par le froid - Demi-produits pour refusion

Le présent document spécifie les exigences relatives à :
Acier X5CrNiCuNb16-4 (1.4549 type 1.4542)
Brut de coulée Traitement thermique de référence : homogénéisé, mis en solution, durci par précipitation et traité sous-zéro
Produits pour refusion
pour applications aérospatiales.
Désignation ASD-STAN : FE-CM61.

Aeronavtika - Jeklo X5CrNiCuNb16-4 (1.4549 tip 1.4542) - Kot litina - Referenčna toplotna obdelava: homogenizirano, topilno žarjeno, izločevalno utrjeno in s temperaturo pod nič stopinj - Material za pretaljevanje

Ta dokument določa zahteve, ki se navezujejo na: jeklo X5CrNiCuNb16-4 (1.4549 tip 1.4542), kot litina, referenčna toplotna obdelava (homogenizirano, topilno žarjeno, izločevalno utrjeno in s temperaturo pod nič stopinj), material za pretaljevanje, za uporabo v aeronavtiki. Oznaka ASD-STAN: FE-CM61.

General Information

• Status: Published
• Publication Date: 17-Dec-2019
• ICS: 49.025.10 - Steels
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 12-Dec-2019
• Due Date: 16-Feb-2020
• Completion Date: 18-Dec-2019
• Ref Project: EN 3484:2019 - Aerospace series - Steel X5CrNiCuNb16-4 (1.4549 type 1.4542) - As cast - Reference heat treatment: homogenised, solution treated, precipitation hardened and sub zero - Remelting stock

Overview

SIST EN 3484:2020 is a European standard developed by CEN and ASD-STAN that specifies the properties and requirements for Steel X5CrNiCuNb16-4 (1.4549 type 1.4542) used in aerospace applications. This steel grade, provided as cast, undergoes a defined reference heat treatment process involving homogenization, solution treatment, precipitation hardening, and sub-zero treatment. The standard governs the production and quality of remelting stock to ensure material consistency and performance in critical aerospace components.

This document supports the aerospace industry's demand for high-performance steel with stringent mechanical and chemical property controls. It harmonizes steel specifications across European countries, enabling manufacturers and purchasers to follow unified criteria for casting and heat treatment.

Key Topics

• Material Designation: Steel X5CrNiCuNb16-4 (1.4549 type 1.4542), commonly known as FE-CM61 in aerospace standards.
• Chemical Composition: Strict limits on elements such as Carbon (max 0.06%), Chromium (15.5–16.7%), Nickel (3.6–4.6%), Copper (2.8–3.5%), Niobium (max 0.4%), and others to guarantee alloy integrity.
• Heat Treatment Process:
  • Homogenized at 1150°C for at least 90 minutes
  • Solution treated at 1040°C for at least 60 minutes
  • Precipitation hardened at 480°C for at least 4 hours
  • Sub-zero treatment at -70°C for 60 minutes or longer
• Delivery Condition: Material is delivered as cast (code U), producing remelting stock for further manufacturing processes.
• Mechanical Properties:
  • Minimum proof stress of 1100 MPa
  • Strength of at least 1240 MPa
  • Elongation minimum 5%
  • Hardness minimum 40 HRC (363 HB)
• Testing Requirements: Separate casting of test pieces is mandatory for quality control, including tensile and hardness testing in accordance with EN 2103-2.
• Remelting Standards: Compliance with EN 2103-2 for production of remelting stock ensures material traceability and readiness for reprocessing.

Applications

SIST EN 3484:2020 steel grade is primarily intended for aerospace applications where exceptional strength, corrosion resistance, and durability under demanding conditions are essential. Typical uses include:

• Structural aerospace components requiring high strength-to-weight ratio.
• Critical parts subjected to thermal cycling and mechanical stresses.
• Manufacture of precision castings and forgings prepared for remelting and further processing.
• Aerospace systems that demand materials with improved fatigue resistance and hardness stability.
• Components exposed to sub-zero environments or requiring cryogenic treatment for enhanced mechanical performance.

By adhering to EN 3484, aerospace manufacturers benefit from a standardized steel that meets the rigorous requirements of safety, reliability, and durability in aerospace engineering.

Related Standards

To fully implement SIST EN 3484:2020 in aerospace manufacturing, the following standards offer complementary guidance and technical requirements:

• EN 2103-2: Aerospace series – Steel, nickel base and cobalt base alloy remelting stock and castings – Technical specification for remelting stock.
• EN 4258: Aerospace series – Metallic materials – General organization of standardization – Links between EN standards.
• EN 4500-005: Aerospace series – Metallic materials – Rules for drafting and presentation of material standards – Specific rules for steels.

These related standards provide comprehensive frameworks for material qualification, definition of terms, testing methodology, and heat treatment protocols, ensuring consistent quality across aerospace supply chains.

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Keywords: SIST EN 3484:2020, Aerospace steel, X5CrNiCuNb16-4, 1.4549 steel grade, precipitation hardened steel, remelting stock, aerospace casting standards, heat treatment, aerospace materials, ASD-STAN, CEN standard.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2020
Aeronavtika - Jeklo X5CrNiCuNb16-4 (1.4549 tip 1.4542) - Kot litina - Referenčna
toplotna obdelava: homogenizirano, topilno žarjeno, izločevalno utrjeno in s
temperaturo pod nič stopinj - Material za pretaljevanje
Aerospace series - Steel FE-CM61 - As cast - Reference heat treatment: homogenised,
solution treated, precipitation hardened and sub zero - Remelting stock
Luft- und Raumfahrt - Stahl FE-CM61 - Gegossen - Referenz wärmbehandlung:
diffusionsgeglüht, losungsgeglüht, ausgehärtet und tieftemperaturbehandelt - Guss vor
material
Série aérospatiale - Acier FE-CM61 - Coulé - Traitement hermique de référence :
homogénéisé, mis en solution, durci par précipitation et traité par le froid - Demi-produits
pour refusion
Ta slovenski standard je istoveten z: EN 3484:2019
ICS:
49.025.10 Jekla Steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 3484
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2019
EUROPÄISCHE NORM
ICS 49.025.10
English Version
Aerospace series - Steel X5CrNiCuNb16-4 (1.4549 type
1.4542) - As cast - Reference heat treatment:
homogenised, solution treated, precipitation hardened and
sub zero - Remelting stock
Série aérospatiale - Acier X5CrNiCuNb16-4 (1.4549 Luft- und Raumfahrt - Stahl X5CrNiCuNb16-4 (1.4549
type 1.4542) - Brut de coulée - Traitement thermique typ 1.4542) - Gegossen - Referenz wärmebehandlung:
de référence : homogénéisé, mis en solution, durci par diffusionsgeglüht, lösungsgeglüht, ausgehärtet und
précipitation et traité sous-zéro - Produits pour tieftemperaturbehandelt - Gussvormaterial
refusion
This European Standard was approved by CEN on 22 April 2019.

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, Turkey 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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3484:2019 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 . 8

European foreword
This document (EN 3484:2019) 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 Standard has
received th
...