EN 4717:2022

Aerospace series - Polyetheretherketone with 55 % continuous carbon fibre by volume (PEEK-CF55) - Stock shape material - Material specification

This document specifies the requirements of a thermoplastic composite stock shape material (e.g. tape,
rod, etc.) consisting of polyetheretherketone with 55 % continuous carbon fibres by volume (PEEK–
CF55) for aerospace applications, which is presupposed to be used in a further thermal moulding
process for forming parts described in EN 4714 1).

Luft- und Raumfahrt - Polyetheretherketon mit 55 %Volumenanteil Endlos-Kohlenstofffaser (PEEK-CF55) - Halbfabrikat - Materialspezifikation

Dieses Dokument legt die Anforderungen an ein aus Polyetheretherketon mit 55 % Volumenanteil Endlos-Kohlenstofffaser (PEEK CF55) bestehendes thermoplastisches Verbundwerkstoff Halbfabrikat (z. B. Streifen, Stab usw.) für Anwendungen in der Luft  und Raumfahrt fest, dessen Verwendung in einem weiteren thermischen Formgussverfahren zur Formung von in EN 4714  beschriebenen Teilen verwendet wird.

Série aérospatiale - Polyétheréthercétone avec 55 % de fibre de carbone continue par volume (PEEK-CF55) - Demi-produit - Spécification de matériau

Aeronavtika - Polietereterketon s 55 % neprekinjenih ogljikovih vlaken (PEEK-CF55) - Zaloga materiala - Specifikacija materialov

Ta dokument določa zahteve za zalogo plastomernega kompozitnega materiala (npr. trakovi, palice itd.) iz polietereterketona s 55 % neprekinjenih ogljikovih vlaken (PEEK-CF55) za uporabo v aeronavtiki, ki naj bi se uporabljal v nadaljnjem postopku toplotnega oblikovanja delov, opisanih v standardu EN 4714-1).

General Information

• Status: Published
• Publication Date: 29-Mar-2022
• Withdrawal Date: 29-Sep-2022
• ICS: 49.025.40 - Rubber and plastics
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 4/S 8 - Thermoplastics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 30-Mar-2022
• Completion Date: 30-Mar-2022
• Ref Project: SIST EN 4717:2022 - Aerospace series - Polyetheretherketone with 55 % continuous carbon fibre by volume (PEEK-CF55) - Stock shape material - Material specification

Overview

EN 4717:2022 is a European standard specifying the material requirements for aerospace-grade polyetheretherketone (PEEK) composites reinforced with 55% continuous carbon fibre by volume (PEEK-CF55). This thermoplastic composite stock shape material-available as tape, rod, or other forms-is intended primarily for aerospace applications where high-performance, lightweight, and durable materials are essential. The standard ensures consistent material properties for subsequent thermal molding processes used to form aircraft components, in line with further specifications outlined in EN 4714.

Developed by the Aerospace and Defence Industries Association of Europe (ASD-STAN) and endorsed by CEN, EN 4717:2022 harmonizes material quality across European aerospace manufacturers. It supports compliance with critical mechanical, thermal, and combustion resistance requirements, enabling safe and reliable use of PEEK-CF55 composites in demanding aerospace environments.

Keywords: aerospace composite materials, PEEK-CF55, carbon fibre reinforced polymer, thermoplastic composite, material specification, aerospace standards

Key Topics

• Material Composition
  PEEK matrix composite reinforced with 55 ± 3% continuous carbon fibre by volume, delivering a balance of strength, stiffness, and weight savings optimized for aerospace applications.

• Mechanical Properties

  • Flexural strength ≥ 1400 MPa along fibre direction (0°), ≥ 90 MPa perpendicular (90°)
  • Flexural strain at break ≥ 0.50% (0°), ≥ 0.55% (90°)
  • Flexural modulus ≥ 125 GPa (0°), ≥ 8.6 GPa (90°)

• Thermal Characteristics

  • Deflection temperature under load around 200 °C ensures stability during thermal cycling
  • High crystallinity (15–45%) affecting thermal and mechanical performance

• Flammability and Smoke Emissions
  Meets stringent aerospace burning behaviour requirements, including:

  • Maximum burn length 203 mm
  • Maximum after-flame time 15 s
  • Restricted smoke density (max 200) and toxic gas emissions (e.g., HCl, HCN, SO2, NOx, CO within defined ppm limits)

• Chemical and Environmental Resistance
  Demonstrated durability after exposure to phosphate ester hydraulic oil, aircraft fuel simulations, and humid atmospheres, with flexural strength variation limited to ±10% or less, confirming reliability in operational environments.

• Standardized Testing Methods
  Defines consistent testing per ISO and EN standards for mechanical strength (ISO 14125, ISO 3597-2), thermal deflection (ISO 75-3), burning behaviour (EN 3844-1, EN 2825, EN 2826), density (ISO 1183-1), and fibre content (EN 2564).

Applications

EN 4717:2022 certified PEEK-CF55 composite stock shape materials are intended for use in aerospace structural components requiring:

• High strength-to-weight ratio
• Superior fatigue and chemical resistance
• Thermal stability for high-temperature environments
• Resistance to flame and reduced smoke/toxicity during fire incidents

Common practical applications include:

• Aircraft interior and exterior structural parts
• Fasteners and joining elements compliant with EN 4714
• Components subject to fluid exposure such as hydraulic and fuel system parts
• Replacement materials in aerospace maintenance and repair operations (MRO)

This standard supports aerospace manufacturers and suppliers in sourcing certified composite materials that meet rigorous performance and safety criteria essential to aviation industry integrity and regulatory compliance.

Related Standards

To ensure comprehensive compliance and interoperability in aerospace manufacturing, EN 4717:2022 references or complements the following standards:

• EN 4714 - Aerospace series for screws, bolts, and nuts manufactured from continuous fibre reinforced PAEK composites
• EN 2564 - Determination of fibre, resin, and void contents in carbon fibre laminates
• EN 2825 & EN 2826 - Burning behaviour tests and smoke gas component measurement for non-metallic materials
• EN 3844-1 - Flammability vertical burner tests for non-metallic materials
• ISO 14125 - Determination of flexural properties for fibre-reinforced plastics
• ISO 75-3 - Temperature of deflection under load for thermosetting laminates
• ASTM D4018-17 - Properties testing methods for continuous filament carbon and graphite fibre tows

Manufacturers and engineers should reference this suite of standards alongside EN 4717:2022 to ensure holistic evaluation of aerospace composite materials from raw stock to finished components.

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By adhering to EN 4717:2022, aerospace industry stakeholders ensure that PEEK-CF55 composite materials meet stringent quality, safety, and performance benchmarks, fostering innovation and trust in advanced thermoplastic composites for critical airframe applications.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2022
Aeronavtika - Polietereterketon s 55 % neprekinjenih ogljikovih vlaken (PEEK-
CF55) - Zaloga materiala - Specifikacija materialov
Aerospace series - Polyetheretherketone with 55 % continuous carbon fibre by volume
(PEEK-CF55) - Stock shape material - Material specification
Luft- und Raumfahrt - Polyetheretherketon mit 55 Volumen % (PEEK-CF55) endlos
Kohlenstofffaser - Halbfabrikat - Materialspezifikation
Série aérospatiale - Polyétheréthercétone avec 55 % de fibre de carbone continue par
volume (PEEK-CF55) - Demi-produit - Spécification de matériau
Ta slovenski standard je istoveten z: EN 4717:2022
ICS:
49.025.40 Guma in polimerni materiali Rubber and plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 4717
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 49.025.40
English Version
Aerospace series - Polyetheretherketone with 55 %
continuous carbon fibre by volume (PEEK-CF55) - Stock
shape material - Material specification
Série aérospatiale - Polyétheréthercétone avec 55 % de Luft- und Raumfahrt - Polyetheretherketon mit 55
fibre de carbone continue par volume (PEEK-CF55) - Volumen % (PEEK-CF55) endlos Kohlenstofffaser -
Demi-produit - Spécification de matériau Halbfabrikat - Materialspezifikation
This European Standard was approved by CEN on 25 July 2021.

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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4717:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Requirements . 5

European foreword
This document (EN 4717:2022) 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
document 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 document shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by September 2022, and conflicting national standards shall
be withdrawn at the latest by September 2022.
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 responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this document: 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 the United Kingdom.
1 Scope
This document specifies the requirements of a thermoplastic composite stock shape material (e.g. tape,
rod, etc.) consisting of polyetheretherketone with 55 % continuous carbon fibres by volume (PEEK–
CF55) for aerospace applications, which is presupposed to be used in a further thermal moulding
1)
process for forming parts described in EN 4714 .
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the editio
...