EN 9132:2006

SLOVENSKI STANDARD
01-september-2009
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Aerospace series - Quality management systems - Data Matrix Quality Requirements for
Parts Marking
Luft- und Raumfahrt - Qualitätsmanagementsystem - Data Matrix
Qualitätsanforderungen für Teilemarkierung
Série aérospatiale - Systèmes de management de la qualité - Exigences qualité du
marquage des pièces en code-barres Data Matrix
Ta slovenski standard je istoveten z: EN 9132:2006
ICS:
03.120.10 Vodenje in zagotavljanje Quality management and
kakovosti quality assurance
49.020 Letala in vesoljska vozila na Aircraft and space vehicles in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 9132
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2006
ICS 03.120.10; 49.020
English Version
Aerospace series - Quality management systems - Data Matrix
Quality Requirements for Parts Marking
Série aérospatiale - Systèmes de management de la Luft- und Raumfahrt - Qualitätsmanagementsystem - Data
qualité - Exigences qualité du marquage des pièces en Matrix Qualitätsanforderungen für Teilemarkierung
code-barres Data Matrix
This European Standard was approved by CEN on 3 February 2006.
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, Romania,
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
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 9132:2006: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Introduction.4
2 Normative references.4
3 Marking requirements.5
4 Marking verification.19
5 Marking validation and monitoring.19
Annex A (informative) Dot peening data capacity guidelines for selected surface textures.20
Annex B (informative) Dot peening – Recommendation for stylus grinding .22
Annex C (informative) Examples of required tolerances with reference to the nominal module
sizes for dot peening .23
(informative)
Annex D Examples of methodology for checking dot peen characteristics .25
Annex E (informative) Visual quality guidelines – Electro chemical etching .29

Foreword
This European Standard (EN 9132:2006) 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 October 2006, and conflicting national standards shall be withdrawn at
the latest by October 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.
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, Romania, Slovakia, Slovenia, Spain, Sweden,
Switzerland and the United Kingdom.

1 Introduction
1.1 Scope
This standard defines uniform Quality and Technical requirements relative to metallic parts marking performed
in using "Data Matrix symbology" used within the aerospace industry. The ISO/IEC 16022 specifies general
requirements (data character encodation, error correction rules, decoding algorithm, etc.). In addition to
ISO/IEC 16022 specification, part identification with such symbology is subject to the following requirements to
ensure electronic reading of the symbol.
The marking processes covered by this standard are as follows:
 Dot peening
 Laser
 Electro-chemical etching
Further marking processes will be included if required.
This standard does not specify information to be encoded
Unless specified otherwise in the contractual business relationship, the company responsible for the design of
the part shall determine the location of the Data Matrix Marking. Symbol position should allow optimum
illumination from all sides for readability.
1.2 Convention
The following conventions are used in this standard:
 The words “shall” and “must” indicate mandatory requirements.
 The word “should” indicates requirements with some flexibility allowed in compliance methodology.
Producers choosing other approaches to satisfy a “should” must be able to show that their approach
meets the intent of the requirement of this standard.
 The words “typical”, “example”, “for reference” or “e.g.” indicate suggestions given for guidance only.
 Appendices to this document are for information only and are provided for use as guidelines.
 Dimensions used in this document are as follows. Metric millimetre sizes followed by Inches in brackets
unless otherwise stated.
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.
ISO/IEC 16022, Information Technology — International Symbology Specification — Data Matrix.
EN 9102, Aerospace series — Quality Systems — First article inspection.
3 Marking requirements
3.1 General requirements
 Rows and columns:
Rows and columns connected with Data Matrix symbology shall conform to ECC200 in the ISO/IEC 16022
 Square versus rectangle:
Matrix may be square or rectangular within ECC200 requirements.
Square is preferred for easier reading.
 Quiet zone:
The quiet zone (margin) around the matrix shall be equal to or greater than one (1) module size.
 Round surface:
If the marking is made on round/curved surface, the symbol coverage shall be equal to or less than 16 %
of the diameter (or 5 % of circumference).
 Symbol size:
To facilitate electronic reading of symbol, the overall symbol size should be less than one 25,4 mm
(1.000 inch), outside dimension, longest side. Irrespective of matrix size used, the requirements included
in this standard shall be applied.
 Angular distortion of the symbol:
Angular deviation of 90-degree axes between row and column shall not exceed ± 7 degrees (see Figure 1
below).
Figure 1 — Angle of distortion
3.2 Dot peening
3.2.1 Description of process
Dot-peen marking technology typically produces round indentations on a part’s surface with a pneumatically or
electromechanically driven pin, otherwise known as a stylus. Critical to the readability of dot-peen marked
symbols are the indented dot’s shape, size, and spacing. The dot size and appearance are determined mostly
by the stylus cone angle, marking force, and material hardness. The indented dot created should be suitable
to trap or reflect light and large enough to be distinguishable from the parts surface roughness. It should also
have spacing wide enough to accommodate varying module sizes, placement, and illumination.
The issues involved in marking and reading dot-peen-marked symbols on metals are different than symbols
printed on paper. The first fundamental difference is that the contrast between dark and light fields is created
by artificial illumination of the symbol. Therefore, the module’s shape, size, spacing, and part surface finish
can all affect symbol readability.
The key to a successful dot-peen marking and reading project is to control the variables affecting the
consistency of the process. Symbol reading verification systems can provide feedback of the process
parameters to some extent. Marking system operating and maintenance procedures must be established to
help ensure consistent symbol quality. Regular maintenance schedules should be established to check for
issues such as stylus wear.
Additional processes, like machining dedicated surfaces, may be necessary to improve the symbol readability.
Cleaning the part surfaces prior to marking with an abrasive pad to remove coatings, rust, and discoloration,
or using an air knife to blow away excess machining fluids, debris, or oil can also increase the symbol
readability.
3.2.2 Instructions for determination of marking parameters
Determination of Determine minimum module size according to the surface

module size texture. See Table 1, Figure 2 (inch) or Figure 3 (mm).
Calculate dot size with regard to the above minimum module
Calculation of
size in choosing stylus angle (60°, 90° or 120°) depending on

optimum dot size
maximum depth allowed by Engineering Design requirements.
See Table 2 for the optimum dot size.
Determine matrix size depending on the information coded in
Determination of
the matrix. (Reference tables in Annex A for minimum matrix
matrix size
size based on available marking area).
Machine
Set up machine (e.g. in height, air pressure, force, etc.) for

set-up
desired dot geometry.
3.2.3 Requirements
 Data Matrix Symbol Nominal Module Size:
The surface texture of the part affects the quality of a Data Matrix symbol produced by dot peening. Table
1 and Figures 2 and 3 show the minimum readable module size requirements to the surface texture of the
part. The Engineering Design authority shall approve changes to the minimum module size.
Table 1 — Minimum readable module size by surface texture (Ra)
Surface Texture (Ra) Minimum module size
Microinches Micrometres Inches Millimetres
32 0,8 0.0075 0,19
63 1,6 0.0087 0,22
95 2,4 0.0122 0,31
125 3,2 0.0161 0,41
250 6,3 0.0236 0,60
0.02 50
0.02 00
0.01 50
0.01 00
0.00 50
0.00 00
0 50 100 150 200 250 300
S u rfac e T e x tu re R a (µ in c h )

Figure 2 — Minimum module size (inch) by surface texture (µinch)

Minimum Cell Size [inch]
0,70
0,65
0,60
0,55
0,50
0,45
0,40
0,35
0,30
0,25
0,20
0,15
0,10
0,05
0,00
0,00 1,00 2,00 3,00 4,00 5,00 6,00 7,00
S u rface T e xtu re R a (µ m )

Figure 3 — Minimum module size (mm) by surface texture (µm)
 Data capacity:
For information, tables in Annex A for Dot Peening show the symbol size and the data capacity compared
to the nominal module size and the number of rows and columns relative to surface texture. These tables
are based on practical testing.
 Data Matrix symbol quality requirements:
Below are the symbol quality requirements of the Data Matrix and marking equipment but these may vary
according to the design requirements and responsibility.
Dot depth is subject to Engineering Design requirements. The Dot depth is based upon the requirements
for process, environment survivability and other material considerations.
Stylus radius is also an Engineering Design requirement. The maximum tolerance shall not exceed 10 %
of the Stylus radius.
Surface colour and colour consistency may be specified as an Engineering Design requirement. In
order to maximize readability, variation in surface colour should be minimized.
Stylus cone angle (Ref α in Annex B) is an Engineering Design requirement. The cone angles permitted
are 60°, 90° and 120°. The tolerance on the cone angle shall be ± 2°. For general quality of mark and
stylus life, stylus cone angle of 120° is preferred.
Stylus point finish shall be polished. Surface texture shall not exceed 32 µinch or 0,8 µm. Guidance
instructions for grinding are given in Annex B.
Stylus point concentricity should be 0,04 mm (0.0016") total indicator reading, or 0,02 mm (0.0008")
radial point displacement. Point concentricity is referenced to stylus centerline. Hand held grinding of
stylus points is not permitted.
Dot size shall not exceed 105 % of the nominal module size and shall not be less than 60
...