SIST EN 4867:2019

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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SIST EN 4867:2019
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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