Aerospace series - Extruded section in aluminium alloys - General tolerances

This standard specifies the general tolerances of:
Extruded section
in aluminium alloys
for aerospace applications.
It applies:
-   to sections, standardized or defined by a drawing, the cross section of which, regular or irregular, can be inscribed in a circle of 250  mm

Luft- und Raumfahrt - Strangpressprofile aus Aluminiumlegierungen - Allgemeine Toleranzen

Diese Norm legt die allgemeinen Toleranzen von:
Strangpressprofilen
aus Aluminiumlegierungen
für Anwendungen in der Luft- und Raumfahrt fest.
Sie ist anwendbar auf:
¾ Genormte oder in einer Zeichnung festgelegte Profile, deren Querschnitt gleichmäßig oder ungleich-mäßig in einen Kreis von 250 mm eingeschrieben werden kann (siehe Bild 1);

Série aérospatiale - Profilés filés en alliages d'aluminium - Tolérances générales

La présente norme spécifie les tolérances générales des :
Profilés filés
en alliages d'aluminium
pour applications aérospatiales.
Elle s'applique :
-   aux profilés normalisés ou définis par un dessin dont la section, régulière ou irrégulière, peut être inscrite dans un cercle de 250 mm

Aerospace series - Extruded section in aluminium alloys - General tolerances

General Information

Status
Published
Publication Date
04-Dec-2001
Withdrawal Date
29-Jun-2002
ICS
49.025.20 - Aluminium
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 4 - Metallic
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
01-Jun-2017
Completion Date
14-Apr-2025
Ref Project
SIST EN 2066:2004 - Aerospace series - Extruded section in aluminium alloys - General tolerances

Overview

EN 2066:2001 - "Aerospace series - Extruded section in aluminium alloys - General tolerances" (CEN) defines the general dimensional and form tolerances for extruded aluminium alloy sections used in aerospace applications. It applies to standardized or drawing-defined sections whose cross section can be inscribed in a circle of 250 mm, including semi‑hollow profiles with specified dimensional limits. This standard is part of the EN metallic materials series for aerospace and links to EN 4258 (general organization of standardization).

Key topics and requirements

  • Scope: Applies to extruded aluminium sections for aerospace where the profile fits within a 250 mm enveloping circle; larger or more complex sections require agreement between manufacturer and purchaser.
  • Transverse cross‑section tolerances: The cross section may be subdivided into elementary rectangles A (largest dimension) and B (thickness). Tolerances on A are tabulated by size range; tolerances on B are specified by combinations of A and B with special rules when B values exceed certain ratios.
  • Length tolerance: Fixed-length sections have a tolerance of 0 / +20 mm.
  • Bead seat radius: Tolerance is ±10% of the radius, with a minimum tolerance of 0.4 mm.
  • Straightness: Overall straightness Y1 must satisfy Y1 ≤ 0.002 × X1 (X1 = total length). Locally, on any 400 mm portion, Y2 ≤ 0.8 mm.
  • Transverse flatness: Maximum flatness deviation f must meet f ≤ 0.006 × A and f ≤ 0.2 mm.
  • Angular dimensions: Angular tolerances are specified as a function of section thickness B (see the standard’s table for applicable angular limits).
  • Twist: Twist tolerances are defined using a coefficient k that depends on the diameter of the enveloping circle; these twist limits apply to sections with linear mass greater than 0.250 kg/m.

Practical applications and users

This standard is intended for:

  • Aerospace manufacturers and structural designers specifying aluminium extrusions for airframe components.
  • Aluminium extrusion mills producing aerospace‑grade profiles to consistent dimensional and form tolerances.
  • Quality and inspection engineers verifying conformity of extruded sections to aerospace tolerance requirements.
  • Purchasers and procurement teams writing specifications or supplier contracts for extruded aluminium parts.

Using EN 2066:2001 helps ensure interchangeability, fit, and assembly consistency for structural and non‑structural aluminium extrusions in aircraft systems.

Related standards

  • EN 4258 - Aerospace series: metallic materials - general organization of standardization and links between EN standards.
  • Other EN aerospace metallic material standards (see the EN series for specific alloy, mechanical property and testing standards).

Keywords: EN 2066:2001, extruded aluminium sections, aerospace tolerances, aluminium alloy extrusions, general tolerances, CEN standard, extruded section tolerances.

Frequently Asked Questions

EN 2066:2001 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Extruded section in aluminium alloys - General tolerances". This standard covers: This standard specifies the general tolerances of: Extruded section in aluminium alloys for aerospace applications. It applies: - to sections, standardized or defined by a drawing, the cross section of which, regular or irregular, can be inscribed in a circle of 250 mm

This standard specifies the general tolerances of: Extruded section in aluminium alloys for aerospace applications. It applies: - to sections, standardized or defined by a drawing, the cross section of which, regular or irregular, can be inscribed in a circle of 250 mm

EN 2066:2001 is classified under the following ICS (International Classification for Standards) categories: 49.025.20 - Aluminium. The ICS classification helps identify the subject area and facilitates finding related standards.

You can purchase EN 2066:2001 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Extruded section in aluminium alloys - General tolerancesLuft- und Raumfahrt - Strangpressprofile aus Aluminiumlegierungen - Allgemeine ToleranzenSérie aérospatiale - Profilés filés en alliages d'aluminium - Tolérances généralesAerospace series - Extruded section
in aluminium alloys - General tolerances49.025.20AluminijAluminiumICS:Ta slovenski standard je istoveten z:EN 2066:2001SIST EN 2066:2004en01-maj-2004SIST EN 2066:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 2066December 2001ICS 49.025.20English versionAerospace series - Extruded section in aluminium alloys -General tolerancesSérie aérospatiale - Profilés filés en alliages d'aluminium -Tolérances généralesLuft- und Raumfahrt - Strangpreßprofile ausAluminiumlegierungen - Allgemeine ToleranzenThis European Standard was approved by CEN on 2 May 2001.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 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 Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2066:2001 ESIST EN 2066:2004

mm (see figure 1),
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