Aerospace series - Laser surface marking by discoloration

This European Standard specifies the marking rules for aerospace products, semi-finished products, and ready to use parts, which need surface marking by discoloration using a laser source to identify the part and/or enhance its traceability.
This type of marking can be used on a wide range of materials (both metallic and non-metallic) and coatings (paints, varnishes…). It is in line with the part definition.

Luft- und Raumfahrt - Lasermarkierung durch Verfärbung

Diese Europäische Norm legt die Eigenschaften von nachträglich montierbaren Schutzschläuchen, flexibel, selbstverschließend, geschirmt (EMI), mit einer Außenschicht aus Meta-Aramidfasern und einer Innen-schicht aus Nickel-Kupfer-Geflecht sowie einer wasserabweisenden Schutzwirkung zur Anwendung in der Luft- und Raumfahrt für elektrische Leitungen und Leitungsbündel fest.

Série aérospatiale - Marquage au laser par décoloration

La présente Norme européenne spécifie les caractéristiques, après installation, des gaines de protection
flexibles, blindées EMI, pourvues d’une protection imperméable et auto-fermable, dont la couche
externe est constituées de fibres méta-aramides et la couche interne d’une tresse en cuivre nickelé,
destinées aux câbles électrique ou torons de câbles pour les applications aérospatiales.

Aeronavtika - Lasersko označevanje na površinah z razbarvanjem

Ta evropski standard določa pravila za označevanje aeronavtičnih izdelkov, polizdelkov in
izdelkov, pripravljenih za uporabo, ki jih je treba po površini lasersko označiti z razbarvanjem, da se dele označi in/ali izboljša njihovo sledljivost.
Ta način označevanja se lahko uporabi pri številnih različnih materialih (tako kovinskih kot nekovinskih) in premazih (barve, laki ...). Je v skladu z definicijo delov.

General Information

Status
Published
Publication Date
18-Jun-2019
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
19-Jun-2019
Completion Date
19-Jun-2019

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SLOVENSKI STANDARD
SIST EN 4867:2019
01-september-2019
Aeronavtika - Lasersko označevanje na površinah z razbarvanjem
Aerospace series - Laser surface marking by discoloration
Luft- und Raumfahrt - Lasermarkierung durch Verblassen
Série aérospatiale - Marquage au laser par décoloration
Ta slovenski standard je istoveten z: EN 4867:2019
ICS:
49.025.01 Materiali za letalsko in Materials for aerospace
vesoljsko gradnjo na splošno construction in general
SIST EN 4867:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 4867:2019
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SIST EN 4867:2019
EN 4867
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2019
EUROPÄISCHE NORM
ICS 49.025.01
English Version
Aerospace series - Laser surface marking by discoloration

Série aérospatiale - Marquage au laser par décoloration Luft- und Raumfahrt - Lasermarkierung durch

Verblassen
This European Standard was approved by CEN on 18 February 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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 4867:2019 E

worldwide for CEN national Members.
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SIST EN 4867:2019
EN 4867:2019 (E)
Contents Page

European foreword ...................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Principle ............................................................................................................................................................. 5

5 Technical requirements ............................................................................................................................... 6

6 Quality requirements .................................................................................................................................. 12

Annex A (informative) Informations regarding the applicability of the process ............................... 14

Bibliography .................................................................................................................................................................. 16

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SIST EN 4867:2019
EN 4867:2019 (E)
European foreword

This document (EN 4867:2019) 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 December 2019, and conflicting national standards shall

be withdrawn at the latest by December 2019.

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 European Standard: 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, Romania, Serbia,

Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
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SIST EN 4867:2019
EN 4867:2019 (E)
1 Scope

This European Standard specifies the marking rules for aerospace products, semi-finished products, and

ready to use parts, which need surface marking by discoloration using a laser source to identify the part

and/or enhance its traceability.

This type of marking can be used on a wide range of materials (both metallic and non-metallic) and

coatings (paints, varnishes…). It is in line with the part definition.
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 edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 4179, Aerospace series — Qualification and approval of personnel for non-destructive testing

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
marking
action of affixing one or more marks on a surface

Note 1 to entry: This type of marking can be composed of one or several laser beam pulse on the same marking

area.
3.2
marking area
authorized area of the part where to perform the marking
3.3
working distance

(beam welding) distance between the surface of the workpiece and a standard reference point of the

equipment which is traceable to the true focusing lens or mirror centre
Note 1 to entry: This is a practical reference distance only.
3.4
mark
information which is applied on the marking area
3.5
permanent mark
mark which remains intelligible throughout the life of the part

Note 1 to entry: No further operations on the marked surface will be carried out (machining, grinding, etc.).

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SIST EN 4867:2019
EN 4867:2019 (E)
3.6
temporary mark
mark which is not intended to be intelligible throughout the life of the part
3.7
manufacturer

the organization which makes the material and/or the product in the form and condition in which it is

delivered to the purchaser, either directly or through a supplier
[SOURCE: ISO 8591-1:1989, definition 2.1.9]
3.8
supplier

person or corporate body party to a business venture, contract, or order they have accepted which

commits them, with respect to the customer, to carrying out the provisions stated therein

3.9
mask

physical pattern located between the laser source and the part, which drives the intensity of the

transmission of the laser beam to the part
4 Principle
4.1 General description of the process

The main objective of laser surface marking by discoloration is to allow the identification of products

and/or their manufacturer to ensure the origin of the part and an adequate level of traceability.

4.2 Applicability and limitations of the process
The laser marking process is applicable on:
 metallic materials;
 non-metallic materials;

 composites (organic matrix composite, ceramic matrix composite and metallic matrix composite);

 polymers;
 elastomers;
 ceramics;
 paints and varnishes;
 coatings;
 welded parts;
 finished parts.
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SIST EN 4867:2019
EN 4867:2019 (E)
It is not applicable on:
 soft materials as gels, foams;
 transparent materials for laser;
 non cohesive materials (e.g.: powder).
5 Technical requirements
5.1 Information for the processor
 material standard reference;
 heat treatment (if necessary);
 surface treatment (if necessary);
 areas to be marked;
 forbidden area for marking;
 specification for testing parts and/or samples.
5.2 Materials and equipment

For the application of discoloration marking, the recommended device can be equipped with a laser

source, with a scanning system and optical positioning system.

The laser beam power by surface unit (in Watt per surface unit) needs to be adapted depending on the

material to be marked. In addition, the spot needs to be adapted to the size of the mark by setting a lenses

system.

The marking can be performed without any mask. The use of a mask may allow to obtain more complex

markings.

The product to be marked and the mask shall be maintained in a fix position during the marking

operation.

The mask can be permanent or disposable, it also shall resist to the laser beam. In case of deterioration,

it needs to be replaced by a new mask. The mask can be composed of all type of material. It shall not

contaminate the surface of the product to be marked.

The marking operation assembly is composed of a laser marking device, a mask and the product to be

marked. It can also support a mirrors system and a lenses system in order to adjust the laser beam onto

the surface of the product to be marked.

It is authorized to move the product between two marking operations, for example when a product needs

many markings, for one or several areas; or also if the pattern marking is divided into several by-patterns

(for example a large size pattern that oversizes the maximum pattern’s size obtainable by the laser

marking device).

The mask shall be located between the laser source and the part, as indicated in Figure 1.

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EN 4867:2019 (E)

Operators shall take every precautions in regards to the utilization of a laser source device, and shall be

qualified in order to ensure that the mark is readable.

All required parameter settings of the marking laser equipment shall be made by the operator on his own

in accordance with the marking specification.

The mask shall be controlled periodically, the periodicity is in function of the laser’s power and of the

nature of the mask.

The material that compose the mask shall not interact with the material to be marked.

If the material to be marked is to be in contact with the mask, materials that constitute the marking

operation assembly (adhesive, paste, tackifying resin…) shall not pollute the material to be marked or in

this case shall be eliminated (e.g. by an appropriate solvent).
The deterioration of the mask shall not decrease the marking quality.
5.2.1 Laser marking equipment setting
Identification of any equipment:
 type of source (for example Nd: YAG), model, manufacturer;
 nominal power;
 number of lasers combined;
 manufacturer’s or measured values (e.g. wavelength, beam divergence).
5.2.2 Beam delivery and focusing system
The operator shall set the equipment and save the following parameters list:
 distance from beam source to focusing system, if necessary;
 beam diameter on entrance to focusing system;
 focusing optics;
 focal length;
 nominal focal spot size and method of measuring, if required;
 beam path protection system;
 pulse width;
 forward speed;
 pulse overlap;
 laser energy (in Joules);
 laser power delivered at the surface (in W.cm-2).
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SIST EN 4867:2019
EN 4867:2019 (E)
Key
1 Laser system
2 Optical system (optional)
3 Modular mask, when necessary
4 Part to be marked
Figure 1 — Different types of laser marking operation assembly
5.2.3 Laser marking parameters

The laser source power shall be adapted to the material to be marked and the nature of the mask.

Pulse parameters:
 pulse energy;
 pulse duration;
 beam profile.
5.3 Marking procedure
5.3.1 Prior to marking step

 Surfaces to receive marking shall be thoroughly cleaned to remove oil, water, grease, dirt, paint

residues and other foreign material, hydraulic fluid, fuel, marking inks, and other surface

contaminations.

 The surface cleaning shall be performed by any method able to completely eliminate all surface

contaminations.
 When required, all surfaces designated for marking shall be cle
...

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