EN 4573:2020

Aerospace series - Heat resisting alloy X12CrNiCoMoW21-20 - Solution treated and precipitation treated - Bars and sections - De ≤ 100 mm

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

Luft- und Raumfahrt - Hochwarmfeste Legierung X12CrNiCoMoW21-20 - Lösungsgeglüht und ausscheidungsgehärtet - Stangen und Profile - De ≤ 100 mm

Dieses Dokument legt die Anforderungen an:
Hochwarmfeste Legierung X12CrNiCoMoW21-20
Lösungsgeglüht und ausscheidungsgehärtet
Stangen und Profile
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 et précipité - Barres et profilés - De ≤ 100 mm

Le présent document spécifie les exigences relatives à :
Alliage résistant à chaud X12CrNiCoMoW21-20
Mis en solution et précipité
Barres et profilés
De ≤ 100 mm
pour applications aérospatiales.
Désignation ASD-STAN : FE-PA4901.

Aeronavtika - Toplotno odporna zlitina X12CrNiCoMoW21-20 - Topilno žarjena in izločevalno utrjena - Palice in profili - De ≤ 100 mm

General Information

• Status: Published
• Publication Date: 18-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: 19-Feb-2020
• Completion Date: 19-Feb-2020
• Ref Project: SIST EN 4573:2020 - Aerospace series - Heat resisting alloy X12CrNiCoMoW21-20 - Solution treated and precipitation treated - Bars and sections - De ≤ 100 mm

Overview

EN 4573:2020 is a European standard developed by the Committee for European Normalization (CEN) that defines the technical specifications for the aerospace-grade heat resisting alloy X12CrNiCoMoW21-20. This alloy is supplied as bars and sections with an external diameter (De) up to 100 mm and is provided in solution treated and precipitation treated conditions. The standard ensures consistent quality and performance to meet the demanding requirements of aerospace applications.

This standard is part of the broader aerospace metallic materials series and aligns with other standards focusing on metallic semi-finished products used by the aerospace industry. It is essential for manufacturers, engineers, and quality assurance professionals who work with high-temperature resistant alloys in aerospace components.

Key Topics

• Material Specification: Defines chemical composition limits of X12CrNiCoMoW21-20, including key elements like carbon (C), chromium (Cr), cobalt (Co), molybdenum (Mo), nickel (Ni), and tungsten (W). The alloy has a precise balance to provide superior heat resistance and mechanical strength.

• Heat Treatment Conditions: Specifies both the solution treatment (heating at 1100–1180°C followed by water quenching) and precipitation treatment (aging at 815 ± 15°C for at least 4 hours with air cooling) processes to optimize alloy properties.

• Mechanical Properties: Includes minimum requirements for proof stress (≥ 345 MPa), tensile strength (690 to 960 MPa), elongation (≥ 30%), and hardness (192 to 247 HB). These properties ensure the alloy withstands extreme thermal and mechanical stresses in aerospace environments.

• Dimensional Range and Form: Covers bars and sections with diameter/maximum dimension up to 100 mm, focusing on wrought forms that suit manufacturing of aerospace components needing high strength and durability.

• Inspection and Testing: Requires compliance with aerospace testing methods including visual inspection, ultrasonic testing for internal imperfections, and grain size evaluation to maintain quality standards essential for aerospace safety.

• Standard References: Refers to related standards like EN 4700-002 for wrought steel products technical specifications and EN 2043 for semi-finished product qualification within aerospace industries.

Applications

EN 4573:2020 governs materials used in manufacturing critical aerospace parts that operate under high-temperature conditions such as:

• Aircraft engine components including turbine blades, discs, and shafts where heat resistance and mechanical strength are vital.
• Structural parts exposed to thermal cycling and corrosive environments, ensuring safety and longevity.
• Spaceflight hardware requiring reliable material properties under extreme thermal stresses.
• High-performance fasteners and fittings subjected to elevated temperatures.

The alloy X12CrNiCoMoW21-20 is specifically chosen for applications demanding a balance of heat resistance, toughness, and dimensional stability with precise processing control.

Related Standards

• EN 4700-002: Technical specifications for steel and heat resisting wrought products including bars and sections, detailing inspection and testing methods complementing EN 4573 requirements.

• EN 2043: General requirements for qualification of semi-finished aerospace metallic products, ensuring that supplied materials meet rigorous aerospace industry standards.

• EN 4258: Framework for aerospace metallic materials standardization outlining the organization and linkage between various aerospace EN standards.

• EN 4500-003: Specific drafting rules for heat resisting alloys in aerospace to ensure clear and consistent documentation of material standards.

By adhering to EN 4573:2020, aerospace manufacturers and suppliers guarantee that heat resisting alloy X12CrNiCoMoW21-20 bars and sections meet critical operational demands, enhancing safety, reliability, and performance of aerospace systems.

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Keywords: EN 4573:2020, heat resisting alloy, X12CrNiCoMoW21-20, aerospace standard, solution treated, precipitation treated, bars and sections, high temperature alloy, aerospace materials, alloy specification, aerospace components, mechanical properties, EN 4700-002, EN 2043, CEN aerospace standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2020
Aeronavtika - Toplotno odporna zlitina X12CrNiCoMoW21-20 - Topilno žarjena in
izločevalno utrjena - Palice in profili - De ≤ 100 mm
Aerospace series - Heat resisting alloy X12CrNiCoMoW21-20 - Solution treated and
precipitation treated - Bars and sections - De ≤ 100 mm
Luft- und Raumfahrt - Hochwarmfeste Legierung X12CrNiCoMoW21-20 -
Lösungsgeglüht und ausscheidungsgehärtet - Stangen und Profile - De ≤ 100 mm
Série aérospatiale - Alliage résistant à chaud X12CrNiCoMoW21-20 - Mis en solution et
précipité - Barres et profilés - De ≤ 100 mm
Ta slovenski standard je istoveten z: EN 4573:2020
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 4573
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 49.025.05
English Version
Aerospace series - Heat resisting alloy X12CrNiCoMoW21-
20 - Solution treated and precipitation treated - Bars and
sections - De ≤ 100 mm
Série aérospatiale - Alliage résistant à chaud Luft- und Raumfahrt - Hochwarmfeste Legierung
X12CrNiCoMoW21-20 - Mis en solution et précipité - X12CrNiCoMoW21-20 - Lösungsgeglüht und
Barres et profilés - De ≤ 100 mm ausscheidungsgehärtet - Stangen und Profile - 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 4573:2020 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 4573:2020) 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. CEN shall not be held respo
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