EN 3330:2009
(Main)Aerospace series - Steel FE-PL1503 (35CrMo4) - Annealead - Bar and wire - De ≤ 40 mm - For prevailing torque nuts
Aerospace series - Steel FE-PL1503 (35CrMo4) - Annealead - Bar and wire - De ≤ 40 mm - For prevailing torque nuts
This standard specifies the requirements relating to:
Steel FE-PL1503 (35CrMo4)
Annealed
Bar and wire
De < or = 40 mm
For prevailing torque nuts
for aerospace applications.
Luft- und Raumfahrt - Stahl FE-PL1503 (35CrMo4) - Geglüht - Stangen und Drähte - De ≤ 40 mm - Für klemmende Sicherungsmuttern
Série aérospatiale - Acier FE-PL1503 (35CrMo4) - Recuit - Barres et fils - De ≤ 40 mm - Pour écrous à freinage interne par déformation
Aeronavtika - Jeklo FE-PL1503 (35CrMo4) - Žarjeno - Palice in žice - De ≤ 40 mm - Za pritrditvene matice
General Information
- Status
- Published
- Publication Date
- 10-Mar-2009
- Withdrawal Date
- 29-Sep-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
- 21-Jan-2026
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 3330:2009 is a European standard developed by CEN that specifies the technical requirements for Steel FE-PL1503 (commonly known as 35CrMo4) in an annealed condition. This standard covers steel supplied as bars and wires with an external diameter (De) up to 40 mm. Its primary focus is on applications in the aerospace industry, particularly for the manufacture of prevailing torque nuts.
The standard ensures high-quality steel material tailored for critical aerospace components, supporting the industry's demand for reliable and consistently high-performance materials. EN 3330:2009 is part of the EN aerospace metallic material series and follows rigorous criteria for chemical composition, mechanical properties, heat treatment, and dimensional tolerances.
Key Topics
Material Specification
Steel FE-PL1503 (35CrMo4), annealed condition
Chemical composition limits for Carbon, Silicon, Manganese, Chromium, Molybdenum, Nickel, Phosphorus, and Sulfur
Air melting method for steel productionForm and Dimensions
Bars and wires with diameters ≤ 40 mm
Dimensional tolerances comply with EN 2034 (for drawn and descaled bars) and EN 2036 (for ground bars)
Delivery condition code: U (Annealed)Mechanical and Physical Properties
Hardness range (HB ≤ 217, HV5 ≤ 228 for annealed condition)
Iron-based alloy steel with controlled impurity levels and minimal decarburization
Test procedures and sample preparation according to EN 4700-2 and EN 4700-4Heat Treatment and Quality Control
Reference heat treatments include salt bath quenching and air cooling processes
Inspection for external defects, surface conditions, and marking as per aerospace industry standards
Manufacturer and purchaser agree on qualification programs for product acceptance
Applications
EN 3330:2009 steel is primarily intended for prevailing torque nuts in aerospace applications. These nuts are essential for securing critical fasteners that must resist loosening under vibration and stress conditions typical in aerospace environments. The chemical and mechanical properties defined in this standard ensure that the nuts made from this steel deliver:
- High strength and durability to maintain preload in fastening systems
- Resistance to wear and fatigue under demanding operational stresses
- Reliable performance with consistent dimensions and material quality
- Compatibility with aerospace manufacturing processes and standards
The steel's use in aerospace prevailing torque nuts contributes to overall safety, longevity, and maintenance efficiency in aircraft and other aerospace vehicles.
Related Standards
EN 3330:2009 references and works in conjunction with several other aerospace and material standards to define comprehensive requirements and testing methods:
- EN 4258 – General organization of aerospace metallic material standardization
- EN 4500-5 – Rules for drafting and presentation of steel material standards
- EN 2034, EN 2036 – Dimensional tolerances for steel bars
- EN 2600 – Designation rules for metallic semi-finished aerospace products
- EN 4700-2, EN 4700-4 – Technical specifications for steel bars and wires
- ASD-STAN regulations for aerospace and defense industry materials
These related standards ensure seamless integration of EN 3330:2009 within aerospace quality management systems and industrial processes.
Keywords: EN 3330:2009, Steel FE-PL1503, 35CrMo4 steel, aerospace steel standard, annealed steel bar, aerospace prevailing torque nuts, aerospace material specifications, steel wire aerospace, dimensional tolerances aerospace steel, aerospace fasteners steel, CEN steel standards
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Frequently Asked Questions
EN 3330:2009 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Steel FE-PL1503 (35CrMo4) - Annealead - Bar and wire - De ≤ 40 mm - For prevailing torque nuts". This standard covers: This standard specifies the requirements relating to: Steel FE-PL1503 (35CrMo4) Annealed Bar and wire De < or = 40 mm For prevailing torque nuts for aerospace applications.
This standard specifies the requirements relating to: Steel FE-PL1503 (35CrMo4) Annealed Bar and wire De < or = 40 mm For prevailing torque nuts for aerospace applications.
EN 3330:2009 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 3330:2009 has the following relationships with other standards: It is inter standard links to EN 4258:2024, EN 7010:2020. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3330:2009 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 3330:2009SIST EN 3330:2009en01-maj-2009SIST EN 3330:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3330
March 2009 ICS 49.025.10 English Version
Aerospace series - Steel FE-PL1503 (35CrMo4) - Annealead - Bar and wire - De ≤ 40 mm - For prevailing torque nuts
Série aérospatiale - Acier FE-PL1503 (35CrMo4) - Recuit -Barres et fils - De ≤ 40 mm - Pour écrous à freinage interne par déformation
Luft- und Raumfahrt - Stahl FE-PL1503 (35CrMo4)
- Geglüht - Stangen und Drähte - De ≤ 40 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 3330:2009: ESIST EN 3330:2009
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