EN 4570:2020

Aerospace series - Heat resisting alloy X12CrNiCoMoW21-20 - Solution treated - Forgings - De ≤ 100 mm

This document specifies the requirements relating to:
Heat resisting alloy X12CrNiCoMoW21-20
Solution treated
Forgings
De ≤ 100 mm
for aerospace applications.
ASD-STAN Designation: FE-PA4901.

Luft- und Raumfahrt - Hochwarmfeste Legierung X12CrNiCoMoW21-20 - Lösungsgeglüht - Schmiedestücke - De ≤ 100 mm

Dieses Dokument legt die Anforderungen an:
Hochwarmfeste Legierung X12CrNiCoMoW21-20
lösungsgeglüht
Schmiedestücke
De ≤ 100 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 - Pièces forgées ou matricées - De ≤ 100 mm

Le présent document spécifie les exigences relatives à :
Alliage résistant à chaud X12CrNiCoMoW21-20
Mis en solution
Pièces forgées ou matricées
De ≤ 100 mm
pour applications aérospatiales.
Désignation ASD-STAN : FE-PA4901.

Aeronavtika - Toplotno odporna zlitina X12CrNiCoMoW21-20 - Topilno žarjena - Izkovki - De ≤ 100 mm

General Information

• Status: Published
• Publication Date: 25-Feb-2020
• Withdrawal Date: 30-Aug-2020
• ICS: 49.025.05 - Ferrous alloys in general
• 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: 26-Feb-2020
• Completion Date: 26-Feb-2020
• Ref Project: SIST EN 4570:2020 - Aerospace series - Heat resisting alloy X12CrNiCoMoW21-20 - Solution treated - Forgings - De ≤ 100 mm

Overview

EN 4570:2020 is a European standard established by CEN that specifies the technical requirements for the aerospace-grade heat resisting alloy X12CrNiCoMoW21-20. This alloy is solution treated and supplied as forgings with a maximum effective diameter (De) of 100 mm. It is predominantly used in high-temperature aerospace applications where durability, corrosion resistance, and mechanical strength are critical.

The standard, designated under ASD-STAN as FE-PA4901, ensures uniformity in quality and performance for aerospace manufacturers and suppliers across Europe. It supports the aerospace industry's demand for reliable, heat-resistant ferrous alloys suitable for structural and engine components.

Key Topics

• Material Composition: EN 4570:2020 defines precise chemical composition limits for the alloy elements including Carbon (0.08-0.16%), Chromium (18.5-21%), Nickel (19-21%), Molybdenum, Cobalt, Tungsten, and others, to maintain the alloy's heat resistance and mechanical properties.

• Manufacturing Process: The alloy must be air or vacuum melted and forged from stock compliant with EN 4263 standards. The forgings are solution treated between 1100°C and 1180°C for 1 hour followed by water quenching (WQ), ensuring optimal mechanical properties.

• Dimensions: Applicable only to forgings with an effective diameter (De) of up to 100 mm to maintain material integrity and performance in aerospace components.

• Mechanical Properties: Minimum proof stress is 305 MPa, with tensile strength between 690 and 880 MPa. Elongation must exceed 35% to guarantee sufficient ductility. Hardness is limited to HB 229 max, ensuring toughness and workability.

• Testing & Inspection: Conformance includes macrographic testing, visual inspection, dimensional checks, and marking per EN 4700-006 specifications. Qualification programs should be mutually agreed upon by manufacturers and purchasers.

• Delivery Conditions: The material is delivered in the solution-treated condition ("U" code), ready for aerospace component fabrication.

Applications

EN 4570:2020's heat resisting alloy X12CrNiCoMoW21-20 is integral to aerospace engineering, particularly for components expected to endure elevated temperatures, thermal cycling, and mechanical stress without degradation. Common applications include:

• Turbine engine parts requiring long-term oxidation and corrosion resistance.
• High-strength forgings for structural aerospace components where heat resistance and mechanical durability are critical.
• Airframe elements exposed to elevated temperatures during operation.
• Hot section components in jet engines, such as blades or discs, demanding dimensional stability and strength.

By adhering to EN 4570:2020, aerospace manufacturers ensure materials meet strict European aerospace industry standards, enhancing safety, performance, and reliability.

Related Standards

EN 4570:2020 is part of a comprehensive series of aerospace metallic material standards. Key related documents include:

• EN 4263: Specifies requirements for aerospace heat resisting alloy FE-PA4901 forgings as forged (stock material up to 200 mm diameter).
• EN 4700-006: Provides technical specifications for pre-production and production aerospace forgings, covering testing, inspection, and dimensional control associated with materials like those in EN 4570.
• EN 4258: Describes the general organization of aerospace metallic materials standardization, linking various material standards including EN 4570.
• EN 4500-003: Details specific drafting rules for heat resisting alloy standards in aerospace applications.

Following these interconnected standards ensures manufacturers maintain a full lifecycle quality control for heat resisting alloys used in aerospace, fostering consistency and regulatory compliance across the European aerospace sector.

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Keywords: EN 4570:2020, aerospace standard, heat resisting alloy, X12CrNiCoMoW21-20, solution treated forgings, aerospace forgings, high-temperature alloy, aerospace materials standard, FE-PA4901, European aerospace specification

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2020
Aeronavtika - Toplotno odporna zlitina X12CrNiCoMoW21-20 - Topilno žarjena -
Izkovki - De ≤ 100 mm
Aerospace series - Heat resisting alloy X12CrNiCoMoW21-20 - Solution treated -
Forgings - De ≤ 100 mm
Luft- und Raumfahrt - Hochwarmfeste Legierung X12CrNiCoMoW21-20 -
Lösungsgeglüht - Schmiedestücke - De ≤ 100 mm
Série aérospatiale - Alliage résistant à chaud X12CrNiCoMoW21-20 - Mis en solution -
Pièces forgées ou matricées - De ≤ 100 mm
Ta slovenski standard je istoveten z: EN 4570:2020
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 4570
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 49.025.05
English Version
Aerospace series - Heat resisting alloy X12CrNiCoMoW21-
20 - Solution treated - Forgings - De ≤ 100 mm
Série aérospatiale - Alliage résistant à chaud Luft- und Raumfahrt - Hochwarmfeste Legierung FE-
X12CrNiCoMoW21-20 - Mis en solution - Pièces forgées PA4901 (X12CrNiCoMoW21-20) - Lösungsgeglüht -
ou matricées - De ≤ 100 mm Schmiedestücke - De ≤ 100 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 4570:2020 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 4570:2020) 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
...