Aerospace series - Identification marking of engine items - Design standard

This standard:
-   describes the location and the layout of the marks of the item;
-   describes the marking processes to be used according to the environment and the function of the items;
-   determines the selection conditions of the marks;
-   determines the compatibility conditions of the marking processes with the constitution, the production and the use of the items.
This document applies to aerospace engine items and shall be used in conjunction with EN 4301.

Luft- und Raumfahrt - Kennzeichnung von Triebwerkbauteilen - Konstruktionsnorm

Diese Norm:
   beschreibt die Anordnung und Gestaltung der Bauteil-Kennzeichnungen;
   beschreibt die zu verwendenden Kennzeichnungsverfahren je nach Umgebung und Funktion der Bauteile;
   bestimmt die Auswahlbedingungen für die Kennzeichnung;
   bestimmt die Verträglichkeitsbedingungen für die Kennzeichnungsverfahren im Hinblick auf Aufbau, Fertigung und Verwendung der Bauteile.
Dieses Dokument gilt für Triebwerkbauteile der Luft- und Raumfahrt und muss in Verbindung mit EN 4301 angewendet werden.

Série aérospatiale - Marquage pour articles moteurs - Normes de conception

Aeronavtika - Označevanje delov motorja - Standard za projektiranje

General Information

Status
Published
Publication Date
15-Apr-2008
Withdrawal Date
30-Oct-2008
ICS
49.050 - Aerospace engines and propulsion systems
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 3 - Mechanical
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
21-Jan-2024
Completion Date
14-May-2025
Ref Project
SIST EN 4300:2008 - Aerospace series - Identification marking of engine items - Design standard

Overview

EN 4300:2008 - published by CEN - is a design standard for identification marking of aerospace engine items. It defines where marks must be placed, how they must be laid out, which marking processes are acceptable given the item’s material, geometry and service environment, and how to ensure marking compatibility with production and use. EN 4300:2008 is intended to be used in conjunction with EN 4301 (identification marking methods) and references other identification practices (e.g., AS 478J / SAE).

Key topics and requirements

  • Scope and purpose: Establishes location, layout and selection rules for identity marks to support traceability, conformity and service instructions.
  • Mark definitions: Distinguishes identity marks (codes, serial numbers, functional indicators) and describes mark composition, size and presentation.
  • Marking selection criteria: Choose processes based on geometry, material, environment and function; ensure marking does not damage item (distortion, embrittlement, corrosion) and remains legible over life.
  • Permanent vs temporary marking: Permanent markings must not impair function or serviceability and are restricted on contacting, mating, heated or chemically processed surfaces; temporary marks are for handling/storage and must be removable or non-damaging.
  • Prohibited and restricted areas: Avoid fillet radii, chamfers, flow areas, assembly/welding/clamping zones, friction/sliding surfaces, highly stressed or case‑hardened regions.
  • Reduced marking: Guidance for small or difficult-to-mark items (use tags or packaging; prioritize designer/company codes, item IDs, serial/manufacturing date).
  • Automatic identification (O.C.R. and electronic methods): Requirements for writing direction, compatible marking processes (e.g., dot-peening 5×7 matrix), and callouts on engineering drawings. Example provided: dot-peening matrix 5×7 with dot depth 0.03–0.10 mm and OCR character height 3.81 mm.
  • Drawing callouts and documentation: Specifies how to indicate marking codes, process codes and restricted marking areas on engineering drawings.

Applications and users

Who benefits from EN 4300:2008:

  • Design engineers specifying mark locations and ensuring marks won’t affect part performance
  • Manufacturers selecting marking processes (dot-peening, engraving, stamping, vibro-peen, etc.)
  • Quality, inspection and traceability teams implementing serialisation, life‑cycle tracking and O.C.R. automated reading
  • Maintenance and MRO organizations requiring durable identification for service history and repair records
  • Supply chain and purchasing ensuring supplier compliance for marked items and packaging

Practical uses:

  • Standardizing engine part identification for traceability and regulatory compliance
  • Selecting marking methods compatible with high-temperature, corrosive or high‑stress environments
  • Implementing automated reading (OCR, barcode) on engine components and assemblies

Related standards

  • EN 4301 - Identification marking methods for engine items (primary complement)
  • AS 478J / SAE - Cross-referenced identification marking practices

Using EN 4300:2008 ensures consistent, durable and safe marking practices across the aerospace engine supply chain, improving traceability, inspection efficiency and lifecycle management.

Frequently Asked Questions

EN 4300:2008 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Identification marking of engine items - Design standard". This standard covers: This standard: - describes the location and the layout of the marks of the item; - describes the marking processes to be used according to the environment and the function of the items; - determines the selection conditions of the marks; - determines the compatibility conditions of the marking processes with the constitution, the production and the use of the items. This document applies to aerospace engine items and shall be used in conjunction with EN 4301.

This standard: - describes the location and the layout of the marks of the item; - describes the marking processes to be used according to the environment and the function of the items; - determines the selection conditions of the marks; - determines the compatibility conditions of the marking processes with the constitution, the production and the use of the items. This document applies to aerospace engine items and shall be used in conjunction with EN 4301.

EN 4300:2008 is classified under the following ICS (International Classification for Standards) categories: 49.050 - Aerospace engines and propulsion systems. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 4300:2008 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Identification marking of engine items - Design standardMHSérie aérospatiale - Marquage pour articles moteurs - Normes de conceptionLuft- und Raumfahrt - Kennzeichnung von Triebwerkbauteilen - Konstruktionsnorm49.050Letalski in vesoljski motorji ter pogonski sistemiAerospace engines and propulsion systemsICS:SIST EN 4300:2008enTa slovenski standard je istoveten z:EN 4300:200801-julij-2008SIST EN 4300:2008SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4300April 2008ICS 49.050 English VersionAerospace series - Identification marking of engine items -Design standardSérie aérospatiale - Marquage pour articles moteurs -Normes de conceptionLuft- und Raumfahrt - Kennzeichnung vonTriebwerkbauteilen - KonstruktionsnormThis European Standard was approved by CEN on 29 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4300:2008: E

1) Published by: Society of Automotive Engineers (SAE), 400 Commonwealth Drive, Warrendale, PA 15096-0001 USA.

(inspection punch)
To provide for traceability of the item. 12345678 (serial number) To specify a functional aspect of the item.
(flow direction of a fluid) To specify the condition of the item. REP R2738 (item having been subjected to repair) To specify a grade of material. • Colour dot on an elastomer seal
5 Application of use 5.1 General Minimum identification shall be provided to clearly identify the part and be compatible with the item and its environment. SX OCB

Identification marks
Code (see EN 4301, Table 1) • Designer's company code : 2 • Item identification number : 1 • Production source's company code : 10 Preference 1
• Serial number (or manufacturing date) : 3 (or 9) • Item identification number : 1 • Production source's company code : 10 Preference 2
• Serial number (or manufacturing date) : 3 (or 9) • Production source's company monogram : 6 Preference 3
• Serial number (or manufacturing date) : 3 (or 9) Preference 4
• Production source's company monogram : 6
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

Loading comments...