EN 2243-4:2005

Aerospace series - Non-metallic materials - Structural adhesives - Test method - Part 4: Metal-honeycomb core flatwise tensile test

This standard defines the general requirements for the determination of strength of structural adhesives by testing in tension metal to honeycomb core joints, at ambient or other temperatures.
Two types of test pieces are defined:
Type A: direct bonding of honeycomb to facing blocks;
Type B: bonding of honeycomb between the two facing sheets, then bonding of the whole to the facing blocks.

Luft- und Raumfahrt - Nichtmetallische Werkstoffe - Strukturelle Klebstoffsysteme - Prüfverfahren - Teil 4: Zugversuch senkrecht zur Deckschicht für Wabenkernverbunde

Diese Norm legt allgemeine Anforderungen fest zur Bestimmung der Zugfestigkeit senkrecht zur Deckschicht von strukturellen Klebstoffen in Metall auf Wabenkernverklebungen bei Raum- oder anderen Temperaturen.
Zwei Typen von Probekörpern sind festgelegt:
Typ A:    der Wabenkern wird direkt auf die Zugblöcke geklebt;
Typ B:   der Wabenkern wird zwischen zwei Deckschichten geklebt, danach wird das Ganze mit den Zugblöcken verklebt.

Série aérospatiale - Matériaux non-métalliques - Système d'adhésifs structuraux - Méthodes d'essai - Partie 4 : Essai de traction perpendiculaire pour métal-nid d'abeilles

Aeronavtika – Nekovinski materiali – Konstrukcijska lepila – Preskusna metoda – 4. del: Navpični preskus natezne trdnosti (kovina-satasto jedro)

General Information

• Status: Published
• Publication Date: 25-Oct-2005
• Withdrawal Date: 29-Apr-2006
• ICS: 49.025.50 - Adhesives
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 4 - Metallic
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 26-Oct-2005
• Completion Date: 26-Oct-2005
• Ref Project: SIST EN 2243-4:2006 - Aerospace series - Non-metallic materials - Structural adhesives - Test method - Part 4: Metal-honeycomb core flatwise tensile test

Relations

• Replaces: EN 2243-4:1991 - Aerospace series - Structural adhesives - Test methods - Part 4: Metal-honeycomb core flatwise tensile test
• Effective Date: 22-Dec-2008

Overview

EN 2243-4:2005 is a critical European standard within the aerospace industry, focusing on structural adhesives used with non-metallic materials. Specifically, it defines the test method for metal-to-honeycomb core flatwise tensile strength of adhesive joints. Developed by CEN (European Committee for Standardization) and approved in 2005, this standard ensures reliable, consistent evaluation of adhesive bonding strength in aerospace structures, which is vital for safety, performance, and longevity.

This standard applies to adhesives bonding metal facing sheets or blocks to honeycomb cores, at ambient or elevated temperatures, and is part of a broader aerospace series on non-metallic materials. It supports stringent quality assurance and certification in aerospace manufacturing and maintenance.

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Key Topics

• Test Scope and Purpose
  EN 2243-4:2005 establishes the procedures for assessing the tensile strength of adhesive joints between metal and honeycomb cores, with a focus on aircraft structural components.

• Test Piece Types

  • Type A: Direct bonding of honeycomb core to metal facing blocks.
  • Type B: Bonding honeycomb between metal facing sheets, then bonding the assembly to facing blocks.

• Temperature Conditions
  Testing covers ambient and non-ambient (up to and above 150 °C) temperatures with specified materials suitable for each range, including aluminum alloys, corrosion-resistant steel, and titanium alloys.

• Materials and Surface Preparation
  The standard references dedicated aerospace-grade alloys (EN 2419, EN 2090, EN 2540, EN 3487, EN 3456, and EN 3464) and mandates surface prep procedures per EN 2334 and EN 2497 to ensure optimal adhesion.

• Testing Protocols

  • Use of class 1 tensile testing machines per EN ISO 7500-1 for accuracy and calibration.
  • Controlled loading rates and detailed measurement of specimen dimensions.
  • Thermal conditioning and temperature stabilization prior to testing.
  • Continuous displacement and load recording until failure.

• Result Expression and Reporting
  The tensile strength is calculated by dividing the failure load by the bonded area. The test report must include comprehensive details on the adhesive system, materials, bonding conditions, test setup, environmental conditions, and result statistics.

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Applications

EN 2243-4:2005 is designed for aerospace manufacturers, quality control labs, and materials engineers involved in:

• Aerospace Structural Bonding
  Ensuring the mechanical integrity of metal-to-honeycomb adhesive joints used extensively in aircraft fuselages, control surfaces, and interior structures.

• Adhesive Qualification and Research
  Evaluating new structural adhesives under realistic mechanical and thermal stress conditions to certify suitability for aero applications.

• Quality Assurance and Certification
  Standardized tensile testing supports compliance with international aerospace quality norms, contributing to safety and certification processes.

• Material Development
  Assisting in the development and benchmarking of metal and non-metal composite materials integrated in aerospace assemblies.

The standard promotes reliable, repeatable testing conditions essential for validating adhesive performance under operational stresses and environmental variations.

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Related Standards

EN 2243-4 is part of the EN 2243 series covering non-metallic materials in aerospace, and it links closely with:

• EN 4385 – General organization of standardization for aerospace non-metallic materials, providing framework context.
• EN 4606 – Specifications for aluminum honeycomb cores used in testing.
• EN ISO 7500-1 – Verification and calibration of tensile testing machines ensuring test machine accuracy.
• EN 2334 / EN 2497 – Surface preparation standards for aluminum and titanium alloys before bonding.
• Other aerospace material standards such as EN 2419, EN 2540, and EN 3456, defining metal alloys for facing blocks/sheets.

These complementary standards establish a consistent, regulated approach to materials testing and certification in aerospace engineering.

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Keywords: EN 2243-4:2005, aerospace structural adhesives, metal-to-honeycomb tensile test, non-metallic materials aerospace, tensile strength adhesive joints, aerospace testing standards, metal honeycomb core bonding, structural adhesive testing methods, aerospace materials standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2006
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GHO1DYSLþQLSUHVNXVQDWH]QHWUGQRVWLNRYLQDVDWDVWRMHGUR
Aerospace series - Non-metallic materials - Structural adhesives - Test method - Part 4:
Metal-honeycomb core flatwise tensile test
Luft- und Raumfahrt - Nichtmetallische Werkstoffe - Strukturelle Klebstoffsysteme -
Prüfverfahren - Teil 4: Zugversuch senkrecht zur Deckschicht für Wabenkernverbunde
Série aérospatiale - Matériaux non-métalliques - Systeme d'adhésifs structuraux -
Méthodes d'essai - Partie 4 : Essai de traction perpendiculaire pour métal-nid d'abeilles
Ta slovenski standard je istoveten z: EN 2243-4:2005
ICS:
49.025.50
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 2243-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2005
ICS 49.025.50 Supersedes EN 2243-4:1991
English Version
Aerospace series - Non-metallic materials - Structural adhesives
- Test method - Part 4: Metal-honeycomb core flatwise tensile
test
Série aérospatiale - Matériaux non-métalliques - Système Luft- und Raumfahrt - Nichtmetallische Werkstoffe -
d'adhésifs structuraux - Méthodes d'essai - Partie 4 : Essai Strukturelle Klebstoffsysteme - Prüfverfahren - Teil 4:
de traction perpendiculaire pour métal-nid d'abeilles Zugversuch senkrecht zur Deckschicht für
Wabenkernverbunde
This European Standard was approved by CEN on 26 September 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2243-4:2005: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Introduction.4
1 Scope.4
2 Normative references.4
3 Definitions, symbols and abbreviations.5
4 Health and safety .5
5 Principle/Technique.5
6 Resources.5
7 Test samples/Test pieces.6
8 Testing procedure.7
9 Expression of results.8
10 Designation.9
11 Test report.9

Foreword
This European Standard (EN 2243-4:2005) has been prepared by the European Association of Aerospace
Manufacturers - Standardization (AECMA-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
AECMA, 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 April 2006, and conflicting national standards shall be withdrawn at the
latest by April 2006.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This European Standard supersedes EN 2243-4:1991.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and the United Kingdom.
Introduction
This standard is part of the series of EN non-metallic material standards for aerospace applications. The
general organization of this series is described in EN 4385. This standard is a level 3 document as defined in
EN 4385.
1 Scope
This standard defines the general requirements for the determination of strength of structural adhesives by
testing in tension metal to honeycomb core joints, at ambient or other temperatures.
Two types of test pieces are defined:
Type A: direct bonding of honeycomb to facing blocks;
Type B: bonding of honeycomb between the two facing sheets, then bonding of the whole to the facing blocks.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1: Tension/
compression testing machines — Verification and calibration of the force-measuring system
(ISO 7500-1:2004).
1)
EN 2090, Aerospace series — Aluminium alloy AL-P2024- — T3 — Clad sheet and strip — 0,3 mm ≤ a ≤ 6 mm.
EN 2334, Aerospace series — Chromic-sulphuric acid pickle of aluminium and aluminium alloys.
1)
EN 2419, Aerospace series — Aluminium alloy AL-P2024- — T351 — Plate — 6 mm < a ≤ 80 mm.
EN 2497, Aerospace series — Dry abrasive blasting of titanium and titanium alloys.
EN 2540, Aerospace series — Steel FE-PM3902 (X7CrNiAl17-7) — Air melted — Solution treated and
1)
precipitation hardened — Sheet and strip – a ≤ 6 mm — 1 240 MPa ≤ R ≤ 1 450 MPa.
m
EN 3456, Aerospace series — Titanium alloy TI-P64001 — Annealed — Sheet and strip, hot rolled —
1)
a ≤ 6 mm.
1)
EN 3464, Aerospace series — Titanium alloy TI-P64001 — Annealed — Plate — 6 mm < a ≤ 100 mm.
EN 3487, Aerospace series — Steel FE-PA13 — Softened — 500 ≤ R ≤ 700 MPa — Bar for machining —
m
1)
D ≤ 100 mm.
e
1) Published as AECMA Prestandard at the date of publication of this standard.
EN 4385, Aerospace series — Non-metallic materials — General organisation of standardisation — Links
1)
between types of standards.
2)
EN 4606, Aerospace series — Aluminium honeycomb core.
3 Definitions, symbols and abbreviations
3.1 Definitions
Not applicable
3.2
...