SIST EN 4572:2020

Aerospace series - Heat resisting alloy X12CrNiCoMoW21-20 - Solution treated - Sheets and strips - a ≤ 3 mm

This document specifies the requirements relating to:
Heat resisting alloy X12CrNiCoMoW21-20
Solution treated
Sheets and strips
a ≤ 3 mm
for aerospace applications.
ASD-STAN designation: FE-PA4901.

Luft- und Raumfahrt - Hochwarmfeste Legierung X12CrNiCoMoW21-20 - Lösungsgeglüht - Bleche und Bänder - a ≤ 3 mm

Dieses Dokument legt die Anforderungen an:
Hochwarmfeste Legierung X12CrNiCoMoW21-20
Lösungsgeglüht
Bleche und Bänder
a ≤ 3 mm
für Anwendungen in der Luft- und Raumfahrt fest.
ASD-STAN-Bezeichnung: FE-PA4901.

Série aérospatiale - Alliage résistant à chaud X12CrNiCoMoW21-20 - Mis en solution - Tôles et bandes - a ≤ 3 mm

Le présent document spécifie les exigences relatives à :
Alliage résistant à chaud X12CrNiCoMoW21-20
Mis en solution
Tôles et bandes
a ≤ 3 mm
pour applications aérospatiales.
Désignation ASD-STAN : FE-PA4901.

Aeronavtika - Toplotno odporna zlitina X12CrNiCoMoW21-20 - Topilno žarjena - Pločevina in trakovi - a ≤ 3 mm

General Information

• Status: Published
• Publication Date: 02-Mar-2020
• ICS: 49.025.05 - Ferrous alloys in general
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 27-Feb-2020
• Due Date: 03-May-2020
• Completion Date: 03-Mar-2020
• Ref Project: EN 4572:2020 - Aerospace series - Heat resisting alloy X12CrNiCoMoW21-20 - Solution treated - Sheets and strips - a ≤ 3 mm

Overview

SIST EN 4572:2020 is a European standard developed by CEN that specifies the requirements for heat resisting alloy X12CrNiCoMoW21-20, solution treated, provided as sheets and strips with thickness up to 3 mm. This standard forms part of the aerospace series of metallic material standards and focuses on materials intended for aerospace applications, ensuring high-performance characteristics under elevated temperatures. Known in the ASD-STAN system as FE-PA4901, SIST EN 4572:2020 aligns with the general standardization rules described in EN 4258 and follows technical specifications outlined in EN 4700-001.

The document governs the chemical composition, production methods, mechanical properties, and heat treatment of the alloy to ensure conformity for critical aerospace components. It supports manufacturers and purchasers in meeting stringent quality and performance expectations essential for safe and reliable aerospace operations.

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Key Topics

• Material Specification: Covers heat resisting alloy X12CrNiCoMoW21-20, solution treated, in sheets and strips, thickness ≤ 3 mm.
• Chemical Composition: Defines precise elemental ranges including carbon (0.08–0.16%), cobalt (18.5–21.0%), chromium (20.0–22.5%), molybdenum (2.5–3.5%), tungsten (2.0–3.0%), and other components to achieve desired heat resistance.
• Production Process: Sheets and strips are cold rolled and melted either by air or vacuum melting processes.
• Delivery Condition: Material is supplied in a solution treated state, with heat treatment performed between 1100 °C and 1180 °C for at least 10 minutes followed by air cooling.
• Mechanical Properties:
  • Proof stress ≥ 305 MPa
  • Tensile strength between 690 MPa and 880 MPa
  • Minimum elongation of 40%
  • Hardness limit up to 235 HV
  • Designated bending radius specifications and impact strength requirements at elevated temperatures.
• Testing and Inspection: Requirements for visual testing, dimensional verification, microstructure analysis, and grain size consistent with EN 4700-001. Product qualification must comply with EN 2043 protocols.

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Applications

The heat resisting alloy X12CrNiCoMoW21-20 standardized under SIST EN 4572:2020 is tailor-made for critical aerospace applications where materials are exposed to high temperatures and mechanical stresses. Typical uses include:

• Jet engine components requiring oxidation and creep resistance
• Structural aerospace parts subjected to elevated thermal conditions
• Exhaust components and heat shields within aerospace vehicles
• High-temperature fasteners and strips in airframes and propulsion systems

Utilizing materials compliant with SIST EN 4572:2020 ensures that aerospace manufacturers achieve optimal durability, safety, and performance while meeting regulatory and quality assurance benchmarks.

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Related Standards

• EN 4258 – Aerospace series - Metallic materials - General organization of standardization
• EN 4700-001 – Aerospace series - Steel and heat resisting alloys - Wrought products - Technical specification - Part 001: Plate, sheet and strip
• EN 2043 – Aerospace series - Metallic materials - General requirements for semi-finished product qualification (excluding forgings and castings)
• EN 4500-003 – Aerospace series - Metallic materials - Rules for drafting and presentation of material standards - Specific rules for heat resisting alloys

These complementary standards provide broader context for implementation, qualification, and technical specifications of aerospace metallic materials, reinforcing consistent quality, traceability, and interoperability.

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By adhering to SIST EN 4572:2020, aerospace industry stakeholders can ensure the use of reliable, high-performance heat resistant alloys conforming to stringent international quality standards, which is essential for advancing aerospace technology and maintaining safety in extreme operating environments.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2020
Aeronavtika - Toplotno odporna zlitina X12CrNiCoMoW21-20 - Topilno žarjena -
Pločevina in trakovi - a ≤ 3 mm
Aerospace series - Heat resisting alloy X12CrNiCoMoW21-20 - Solution treated - Sheets
and strips - a ≤ 3 mm
Luft- und Raumfahrt - Hochwarmfeste Legierung X12CrNiCoMoW21-20 -
Lösungsgeglüht - Bleche und Bänder - a ≤ 3 mm
Série aérospatiale - Alliage résistant à chaud X12CrNiCoMoW21-20 - Mis en solution -
Tôles et bandes - a ≤ 3 mm
Ta slovenski standard je istoveten z: EN 4572:2020
ICS:
49.025.05 Železove zlitine na splošno Ferrous alloys in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 4572
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 49.025.05
English Version
Aerospace series - Heat resisting alloy X12CrNiCoMoW21-
20 - Solution treated - Sheets and strips - a ≤ 3 mm
Série aérospatiale - Alliage résistant à chaud Luft- und Raumfahrt - Hochwarmfeste Legierung
X12CrNiCoMoW21-20 - Mis en solution - Tôles et X12CrNiCoMoW21-20 - Lösungsgeglüht - Bleche und
bandes - a ≤ 3 mm Platten - a ≤ 3 mm
This European Standard was approved by CEN on 8 December 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4572:2020 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 4572:2020) 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 the approval of the National Associations and the Official Services of the member countries of
ASD, prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2020, and conflicting national standards shall be
withdrawn at the latest by August 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights
...