EN 2957:2019

Aerospace series - Method of preparation of forged samples

This document defines the requirements for the preparation of forged test samples.
Unless otherwise specified on the drawing, order, or inspection schedule, this document shall be applied when referenced in the relevant EN material standard or EN technical specification.
This document applies to round products of ≥ 20 mm diameters or other shapes of equivalent cross-section.

Luft- und Raumfahrt - Verfahren zur Herstellung von Schmiedeproben

Dieses Dokument legt die Anforderungen für die Herstellung von Schmiedeprüfteilen fest.
Sofern in der Zeichnung, Bestellung oder in der Prüfanweisung nichts anderes festgelegt ist, muss dieses Dokument angewendet werden, wenn in der relevanten EN-Werkstoffnorm oder technischen Lieferbedingung einer EN darauf verwiesen wird.
Dieses Dokument gilt für runde Produkte mit einem Durchmesser von ≥ 20 mm oder für andere Formen mit einem äquivalenten Querschnitt.

Série aérospatiale - Méthode pour la préparation d'échantillons forgés

Le présent document détermine les exigences pour la préparation d’échantillons d’essai forgés.
Sauf indication contraire dans le dessin, la commande, ou le programme d’inspection, le présent document doit être appliqué dans la norme matériau EN appropriée ou dans la spécification technique EN.
Le présent document s’applique aux produits ronds de ≥ 20 mm de diamètre ou autres formes de section transversale équivalentes.

Aeronavtika - Metoda priprave kovanih vzorcev

Ta evropski standard določa zahteve za pripravo kovanih preskusnih vzorcev. Če ni na risbi, v naročilu ali v razporedu pregledov navedeno drugače, je treba ta dokument uporabljati, kadar se nanj sklicuje določilo v ustreznem standardu EN za materiale ali tehnični specifikaciji EN. Ta dokument se uporablja za okrogle izdelke s premerom ≥ 20 mm ali druge oblike z enakovrednim prečnim prerezom.

General Information

• Status: Published
• Publication Date: 24-Sep-2019
• Withdrawal Date: 30-Mar-2020
• ICS: 49.025.99 - Other materials
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 4 - Metallic
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 25-Sep-2019
• Completion Date: 25-Sep-2019
• Ref Project: SIST EN 2957:2020 - Aerospace series - Method of preparation of forged samples

Overview

EN 2957:2019 is a European Standard published by CEN that specifies the method of preparation for forged test samples within the aerospace industry. It defines detailed requirements applicable primarily to round products with diameters of 20 mm or greater, as well as other shapes with equivalent cross-sectional areas. This standard ensures consistency and reliability in the production and testing of forged aerospace materials to meet stringent safety and quality criteria.

The standard is mandatory when referenced by relevant EN material standards or technical specifications, providing foundational guidelines for manufacturers and purchasers in aerospace sectors to agree upon sample preparation and testing procedures.

Key Topics

• Scope and Applicability
  EN 2957:2019 applies to forged sample preparation for aerospace materials, focusing on round bars ≥ 20 mm in diameter or equivalent cross-sections. It is invoked by material-specific EN standards unless otherwise specified.

• Definitions

  • Blank: A sample cut from the forging stock.
  • Pancake: A sample obtained by upsetting (compressing) a blank.

• Blank Removal Method
  The location and size of blanks are agreed between purchaser and manufacturer unless otherwise indicated in technical specifications. The blank’s dimensions and forms are standardized based on forging stock diameter or cross-section to ensure representative sampling.

• Forging Conditions
  The forging temperature and heating regimen must be agreed upon, with blanks maintained at the target temperature for at least 30 minutes prior to forging. Final forging operations are preferably completed in one heat cycle. Pancake thickness should be one-third the original blank thickness.

• Use of Pancakes
  Pancakes serve multiple purposes in aerospace forging:

  • To assess forgeability of the material.
  • To evaluate structural characteristics against material standards or orders.
  • To provide specific locations for sampling mechanical test pieces such as impact or toughness tests, as indicated in the standard’s schematic figures.

Applications

EN 2957:2019 is vital for aerospace manufacturers, quality assurance engineers, and material testing laboratories focused on structural components. It supports:

• Quality Control of Forgings: Establishing consistent sampling from forgings to verify mechanical properties and structural integrity.
• Material Certification: Assuring aerospace components meet EN material standards through standardized test samples.
• Process Optimization: Refining forging procedures and temperatures to produce reliable test pancakes representative of final products.
• Compliance and Traceability: Providing documented, standardized methods and dimensions that align with European aerospace regulations and quality assurance mandates.

Using this standard helps aerospace organizations reduce variability in testing samples, thereby improving reliability of mechanical tests and forging assessments critical to aviation safety and performance.

Related Standards

EN 2957:2019 functions in conjunction with other EN material standards and technical specifications relevant to aerospace forgings, including but not limited to:

• EN material standards that reference forged products and specify mechanical testing requirements.
• Aerospace series standards developed by ASD-STAN (Aerospace and Defence Industries Association of Europe - Standardization).
• ISO and IEC terminology databases for harmonized definitions related to forged materials and testing.

Manufacturers and users of EN 2957:2019 are advised to consult specific EN material standards applicable to their forged components for comprehensive requirements on testing and processing, ensuring full compliance with aerospace industry regulations.

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Keywords: EN 2957:2019, aerospace forging, forged samples preparation, aerospace standards, forged test samples, pancake sample, forging conditions, aerospace material testing, European aerospace standards, forged components quality control

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2020
Aeronavtika - Metoda priprave kovanih vzorcev
Aerospace series - Method of preparation of forged samples
Luft- und Raumfahrt - Verfahren zur Herstellung von Schmiedeproben
Série aérospatiale - Méthode pour la préparation d'échantillons forgés
Ta slovenski standard je istoveten z: EN 2957:2019
ICS:
49.025.99 Drugi materiali Other materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 2957
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2019
EUROPÄISCHE NORM
ICS 49.025.99
English Version
Aerospace series - Method of preparation of forged
samples
Série aérospatiale - Méthode pour la préparation Luft- und Raumfahrt - Verfahren zur Herstellung von
d'échantillons forgés Schmiedeproben
This European Standard was approved by CEN on 6 January 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 2957:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Method of blank removal . 4
5 Forging conditions . 6
6 Pancake use . 6

European foreword
This document (EN 2957:2019) 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 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 March 2020, and conflicting national standards shall be
withdrawn at the latest by March 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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