SIST EN 2481:2011

• Abstract:

  This standard specifies the requirements relating to:; Steel FE-PL2108 (36NiCrMo16); 1 250 MPa ≤ Rm ≤ 1 400 MPa; Forgings; De ≤ 75 mm; for aerospace applications.

• Status: Published
• Publication Date: 03-Oct-2011
• ICS: 49.025.10 - Steels
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 21-Sep-2011
• Due Date: 26-Nov-2011
• Completion Date: 04-Oct-2011
• Ref Project: EN 2481:2010 - Aerospace series - Steel FE-PL2108 (36NiCrMo16) - 1 250 MPa ≤ Rm ≤ 1 400 MPa - Forgings - De ≤ 75 mm

• Refers: SIST EN 4700-006:2026 - Aerospace series - Steel and heat-resisting alloys - Wrought products - Technical specification - Part 006: Pre-production and production forgings
• Effective Date: 28-Jan-2026
• Refers: SIST EN 4258:2024 - Aerospace series - Metallic materials - General organization of standardization - Link between types of European Standards and their use
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 7010:2020 - Aerospace series - Configuration - Definition and designation for product standards for externally threaded fasteners
• Effective Date: 28-Jan-2026

Overview

EN 2481:2010 (CEN) defines material and delivery requirements for the aerospace steel FE-PL2108 (36NiCrMo16) - a high‑strength low‑alloy steel specified for forgings with De ≤ 75 mm. The standard is part of the EN aerospace material series prepared under ASD‑STAN and sets chemical composition, heat‑treatment, mechanical property and inspection requirements for components intended for aerospace applications where Rm 1 250–1 400 MPa is required.

Key topics and requirements

• Material designation: FE-PL2108 (36NiCrMo16) - the document also references 35NiCrMo16 in some versions; both appear in the EN text.
• Form and size: Forgings, maximum effective diameter De ≤ 75 mm.
• Chemical composition (typical ranges):
  • C 0.30–0.40 %, Si 0.15–0.40 %, Mn 0.30–0.60 %
  • Cr 1.60–2.00 %, Mo 0.25–0.60 %, Ni 3.50–4.20 %
  • P ≤ 0.025 %, S ≤ 0.020 %
• Melting method: Air melted.
• Heat treatment / delivery conditions:
  • Annealed or hardened and tempered
  • Quench range: 860 °C ≤ θ ≤ 890 °C; tempering θ ≥ 540 °C
• Mechanical properties (hardened & tempered):
  • Tensile strength Rm = 1 250–1 400 MPa
  • Proof stress Rp0.2 ≥ 1 050 MPa
  • Elongation A ≥ 8 %
  • Reduction of area Z ≥ 40 %
  • Impact energy KV ≥ 25 J
• Inspection & testing: Macrostructure, grain size, internal/external defect limits, marking and dimensional checks referenced to EN 4700‑006 and ultrasonic acceptance criteria EN 4050‑4.
• Product qualification: Qualification program to be agreed between manufacturer and purchaser.

Applications and users

EN 2481:2010 is aimed at organizations specifying, producing or qualifying high‑strength forged steels for aerospace use. Typical users include:

• Aerospace design and stress engineers selecting materials meeting strict tensile and proof stress requirements.
• Forging manufacturers and heat‑treatment shops producing small‑diameter (De ≤ 75 mm) aerospace forgings.
• Quality, procurement and certification teams requiring defined chemistry, mechanical properties and inspection regimes.
• Suppliers preparing technical specifications for procurement of FE‑PL2108 forgings.

Related standards

• EN 4700‑006 - Technical specification for pre‑production and production forgings (referenced for test pieces and sampling)
• EN 4050‑4 - Ultrasonic inspection acceptance criteria
• EN 4258 - Organization of aerospace metallic material standards
• EN 4500‑5 - Rules for drafting aerospace steel standards

Keywords: EN 2481:2010, FE‑PL2108, 36NiCrMo16, aerospace steel, high‑strength forgings, De ≤ 75 mm, Rm 1250‑1400 MPa, hardened and tempered, EN 4700‑006, EN 4050‑4.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.49.025.10JeklaSteelsICS:Ta slovenski standard je istoveten z:EN 2481:2010SIST EN 2481:2011en,fr,de01-november-2011SIST EN 2481:2011SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2481
December 2010 ICS 49.025.10 English Version
Aerospace series - Steel FE-PL2108 (35NiCrMo16) - 1 250 MPa ≤ Rm ≤ 1 400 MPa - Forgings - De ≤ 75 mm
Série aérospatiale - Acier FE-PL2108 (35NiCrMo16) - 1 250MPa ≤ Rm ≤ 1 400 MPa - Pièces forgées et matricées - De ≤ 75 mm
Luft- und Raumfahrt - Stahl FE-PL2108 (35NiCrMo16) - 1 250 MPa ≤ Rm ≤ 1 400 MPa - Gesenk- und Freiformschmiedestücke - De ≤ 75 mm This European Standard was approved by CEN on 2 July 2010.
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-CENELEC 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-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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.
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B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2481:2010: ESIST EN 2481:2011
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