EN 3329:2009
(Main)Aerospace series - Steel FE-PL1503 (35CrMo4) - Annealead - Sheet and strip - 0,3 mm ≤ a ≤ 2 mm - For prevailing torque nuts
Aerospace series - Steel FE-PL1503 (35CrMo4) - Annealead - Sheet and strip - 0,3 mm ≤ a ≤ 2 mm - For prevailing torque nuts
This standard specifies the requirements relating to:
Steel FE-PL1503 (35CrMo4)
Annealed
Sheet and strip
0,3 mm ≤ a ≤ 2 mm
For prevailing torque nuts
for aerospace applications.
Luft- und Raumfahrt - Stahl FE-PL1503 (35CrMo4) - Geglüht - Bleche und Bänder - 0,3 mm ≤ a ≤ 2 mm - Für klemmende Sicherungsmuttern
Diese Norm legt die Anforderungen an
Stahl FE-PL1503 (35CrMo4)
geglüht
Bleche und Bänder
0,3 mm ≤ a ≤ 2 mm
für klemmende Sicherungsmuttern
für Anwendungen in der Luft- und Raumfahrt fest.
Série aérospatiale - Acier FE-PL1503 (35CrMo4) - Recuit - Tôles et bandes - 0,3 mm ≤ a ≤ 2 mm - Pour écrous à freinage interne par déformation
Aeronavtika - Jeklo FE-PL1503 (35CrMo4) - Žarjeno - Pločevina in trakovi - 0,3 mm ≤ a ≤ 2 mm - Za pritrditvene matice
General Information
- Status
- Published
- Publication Date
- 12-May-2009
- Withdrawal Date
- 29-Nov-2009
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 4 - Metallic
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 21-Jan-2025
- Completion Date
- 09-Feb-2026
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 3329:2009 is a CEN aerospace series standard that specifies material requirements for steel FE-PL1503 (35CrMo4) in the form of annealed sheet and strip with thicknesses 0.3 mm ≤ a ≤ 2 mm, intended specifically for manufacturing prevailing torque nuts used in aerospace applications. The standard defines chemical limits, production and heat‑treatment notes, hardness and decarburization controls, and references applicable test and inspection rules.
Key topics and technical requirements
- Material designation: Steel FE-PL1503 (35CrMo4), annealed.
- Chemical composition (typical limits):
- C: 0.30–0.37 %
- Si: 0.15–0.40 %
- Mn: 0.50–0.80 %
- P: ≤ 0.025 %
- S: ≤ 0.020 %
- Cr: 0.90–1.20 %
- Mo: 0.15–0.30 %
- Ni: ≤ 0.40 %
- Fe: balance
- Form and dimensions: Sheet and strip; thickness range 0.3 mm to 2 mm.
- Melting method: Air-melted steel.
- Delivery condition: Annealed (delivery code U).
- Heat treatment guidance: Reference heat treatment example given (step quench in salt bath 850–860 °C, salt bath quench ≥325 °C, air cool or equivalent) - used as a reference for subsequent processing.
- Hardness controls: Hardness limits are specified in the standard (examples shown include HRB ≤ 96 / HV5 ≤ 228 and alternative ranges HRC 40–43 / HV5 390–430 depending on condition).
- Decarburization: Material shall be free from carburization; total decarburization not present; partial decarburization ≤ 5 % of diameter with maximum depth 0.2 mm.
- Testing & inspection: Test samples and methods referenced to EN 4700-1; dimensional inspection per EN 2033; marking and other inspections per EN 4700-1.
Applications and who uses the standard
EN 3329:2009 is used by:
- Aerospace fastener manufacturers producing prevailing torque nuts and other thin steel nut components.
- Design and mechanical engineers specifying materials for aerospace nuts where controlled prevailing torque (locking by deformation) is required.
- Procurement and quality assurance teams who need a standardized material specification for sourcing and inspection.
- Certification bodies and suppliers establishing product qualification programs (qualification program to be agreed between manufacturer and purchaser).
Practical benefits include consistent material chemistry and microstructural control for predictable locking behaviour, reliable hardness and decarburization limits to ensure fatigue and performance, and harmonized inspection references for aerospace supply chains.
Related standards
- EN 2033 - Strips, cold rolled in steel - Dimensions and thicknesses
- EN 4258 - General organization of aerospace metallic material standards
- EN 4500-5 - Rules for drafting/presentation of metallic material standards (steels)
- EN 4700-1 - Wrought steel product technical specifications (plate, sheet, strip)
Keywords: EN 3329:2009, FE-PL1503, 35CrMo4, annealed sheet and strip, prevailing torque nuts, aerospace steel, CEN standard.
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Frequently Asked Questions
EN 3329:2009 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Steel FE-PL1503 (35CrMo4) - Annealead - Sheet and strip - 0,3 mm ≤ a ≤ 2 mm - For prevailing torque nuts". This standard covers: This standard specifies the requirements relating to: Steel FE-PL1503 (35CrMo4) Annealed Sheet and strip 0,3 mm ≤ a ≤ 2 mm For prevailing torque nuts for aerospace applications.
This standard specifies the requirements relating to: Steel FE-PL1503 (35CrMo4) Annealed Sheet and strip 0,3 mm ≤ a ≤ 2 mm For prevailing torque nuts for aerospace applications.
EN 3329:2009 is classified under the following ICS (International Classification for Standards) categories: 49.025.10 - Steels. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 3329:2009 has the following relationships with other standards: It is inter standard links to EN 4258:2024, EN 2882:2006. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3329:2009 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.49.025.10JeklaSteelsICS:Ta slovenski standard je istoveten z:EN 3329:2009SIST EN 3329:2009en01-julij-2009SIST EN 3329:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3329
May 2009 ICS 49.025.10 English Version
Aerospace series — Steel FE-PL1503 (35CrMo4) — Annealed — Sheet and strip — 0,3 mm ≤ a ≤ 2 mm — For prevailing torque nuts
Série aérospatiale — Acier FE-PL1503 (35CrMo4) — Recuit — Tôles et bandes — 0,3 mm ≤ a ≤ 2 mm — Pour écrous à freinage interne par déformation
Luft- und Raumfahrt — Stahl FE-PL1503 (35CrMo4) — Geglüht — Bleche und Bänder — 0,3 mm ≤ a ≤ 2 mm — Für klemmende Sicherungsmuttern This European Standard was approved by CEN on 18 October 2008.
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 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 Management Centre has the same status as the official 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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3329:2009: ESIST EN 3329:2009
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