SIST EN 3761:2020

Aerospace series - Heat resisting alloy FE-PA2601 - Softened and cold worked - Bar for forged fasteners - D ≤ 50 mm - 1 100 MPa ≤ Rm ≤ 1 300 MPa

This document specifies the requirements relating to:
Heat resisting alloy FE-PA2601
Softened and cold worked
Bar for forged fasteners
D ≤ 50 mm
1 100 MPa ≤ Rm ≤ 1 300 MPa
for aerospace applications.

Luft- und Raumfahrt - Hochwarmfeste Legierung FE-PA2601 - Weichgeglüht und kaltverfestigt - Stangen zum Stauchen für Verbindungselemente - D ≤ 50 mm - 1 100 MPa ≤ Rm ≤ 1 300 MPa

Dieses Dokument legt die Anforderungen an:
Hochwarmfeste Legierung FE-PA2601
weichgeglüht und kaltverfestigt
Stange zum Stauchen für Verbindungselemente
D ≤ 50 mm
1 100 MPa ≤ Rm ≤ 1 300 MPa
für Anwendungen in der Luft- und Raumfahrt fest.

Série aérospatiale - Alliage résistant à chaud FE-PA2601 - Adouci et écroui - Barres pour éléments de fixations forgés - D ≤ 50 mm - 1 100 MPa ≤ Rm ≤ 1 300 MPa

Le présent document spécifie les exigences relatives à :
Alliage résistant à chaud FE-PA2601
Adouci et écroui
Barre pour éléments de fixation forgés
D ≤ 50 mm
1 100 MPa ≤ Rm ≤ 1 300 MPa
pour applications aérospatiales.

Aeronavtika - Toplotno odporna zlitina FE-PA2601 - Popuščana in hladno obdelana - Palice za kovane vezne elemente - D ≤ 50 mm - 1100 MPa ≤ Rm ≤ 1300 MPa

Ta standard določa zahteve, ki se navezujejo na: toplotno odporno zlitino FE-PA2601, popuščana in hladno obdelana, palice za kovane vezne elemente D ≤ 50 mm, 1100 MPa ≤ Rm ≤ 1300 MPa za uporabo v aeronavtiki.

General Information

• Status: Published
• Publication Date: 10-Feb-2020
• ICS: 49.025.05 - Ferrous alloys in general
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 23-Jan-2020
• Due Date: 29-Mar-2020
• Completion Date: 11-Feb-2020
• Ref Project: EN 3761:2020 - Aerospace series - Heat resisting alloy FE-PA2601 - Softened and cold worked - Bar for forged fasteners - D ≤ 50 mm - 1 100 MPa ≤ Rm ≤ 1 300 MPa

Overview

The SIST EN 3761:2020 standard, published by the European Committee for Standardization (CEN), defines the requirements for the heat resisting alloy FE-PA2601 used in aerospace applications. This standard specifically covers the alloy in a softened and cold worked condition, supplied as bars intended for forged fasteners with a diameter (D) of up to 50 mm. The mechanical tensile strength (Rm) requirement ranges from 1,100 MPa to 1,300 MPa, ensuring high performance under demanding aerospace conditions.

As part of the aerospace series of metallic material standards, SIST EN 3761:2020 harmonizes specifications for this critical alloy to ensure reliability, traceability, and quality across the aerospace industry in Europe.

Key Topics

• Material Specification: Defines the chemical composition limits and mechanical properties of the heat resisting alloy FE-PA2601, controlling elements such as Carbon, Silicon, Manganese, Chromium, Molybdenum, Nickel, Titanium, and Vanadium.
• Condition and Treatment:
  • Softened and cold worked condition with cold working between 15% and 25% at max 870 °C.
  • Heat treatment processes including a reference precipitation treatment at 720 °C for 16 hours.
• Dimensions: Bars with a maximum diameter of 50 mm.
• Mechanical Properties:
  • Tensile strength (Rm) between 1,100 and 1,300 MPa.
  • Proof stress (Rp0.2) minimum of 770 MPa.
  • Minimum elongation of 12% ensuring ductility.
  • Hardness controlled between 341 and 410 HB to balance strength and workability.
• Testing and Quality Control:
  • Non-destructive penetrant testing (according to EN 2002-16) for surface defect detection.
  • Specifications on grain size and absence of duplex structures to guarantee consistent mechanical properties.
  • Batch sampling and qualification programs agreed between manufacturer and purchaser to validate product compliance.

Applications

SIST EN 3761:2020 is primarily intended for use in the aerospace industry, especially for the manufacture of forged fasteners that operate in high-temperature and stress environments such as aircraft engine components and structural assemblies. The heat resisting alloy FE-PA2601 bars are designed to withstand:

• Elevated operating temperatures
• High tensile and shear loads
• Corrosion and oxidation effects common in aerospace environments

Key advantages of using FE-PA2601 alloy bars under this standard include:

• Superior heat resistance compatible with aerospace operating conditions.
• Reliable mechanical properties with tight quality control.
• Compatibility with cold working and forging processes needed for producing critical fasteners.

Related Standards

• EN 4258: General organization of aerospace metallic material standards, providing a framework linking various EN standards.
• EN 4500-003: Rules for drafting and presenting aerospace metallic material standards including specific provisions for heat resisting alloys.
• EN 4700-002: Technical specifications for steel and heat resisting alloys wrought products, detailing requirements for bars and sections including delivery conditions.
• EN 2002-16: Non-destructive testing for aerospace materials focusing on penetrant testing techniques required to detect surface defects.

These standards collectively support the aerospace industry's demand for reliable material specifications, quality assurance, and traceability essential to engineering safety and performance.

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Keywords: SIST EN 3761:2020, heat resisting alloy FE-PA2601, aerospace fasteners, cold worked alloy bar, aerospace materials standards, forged fasteners, tensile strength 1100-1300 MPa, aerospace heat resistant alloys, CEN aerospace standards, material specifications aerospace.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2020
Aeronavtika - Toplotno odporna zlitina FE-PA2601 - Popuščana in hladno obdelana
- Palice za kovane vezne elemente - D ≤ 50 mm - 1100 MPa ≤ Rm ≤ 1300 MPa
Aerospace series - Heat resisting alloy FE-PA2601 - Softened and cold worked - Bar for
forged fasteners - D ≤ 50 mm - 1 100 MPa ≤ Rm ≤ 1 300 MPa
Luft- und Raumfahrt - Hochwarmfeste Legierung FE-PA2601 - Weichgeglüht und
kaltverfestigt - Stangen zum Stauchen für Verbindungselemente - D ≤ 50 mm - 1 100
MPa ≤ Rm ≤ 1 300 MPa
Série aérospatiale - Alliage résistant à chaud FE-PA2601 - Adouci et écroui - Barres
pour éléments de fixations forgés - D ≤ 50 mm - 1 100 MPa ≤ Rm ≤ 1 300 MPa
Ta slovenski standard je istoveten z: EN 3761:2020
ICS:
49.025.05 Železove zlitine na splošno Ferrous alloys in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 3761
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2020
EUROPÄISCHE NORM
ICS 49.025.05
English Version
Aerospace series - Heat resisting alloy FE-PA2601 -
Softened and cold worked - Bar for forged fasteners - D ≤
50 mm - 1 100 MPa ≤ Rm ≤ 1 300 MPa
Série aérospatiale - Alliage résistant à chaud FE- Luft- und Raumfahrt - Hochwarmfeste Legierung FE-
PA2601 - Adouci et écroui - Barre pour éléments de PA2601 - Weichgeglüht und kaltverfestigt - Stange zum
fixations forgés - D ≤ 50 mm - 1 100 MPa ≤ Rm ≤ 1 300 Stauchen für Verbindungselemente - D ≤ 50 mm - 1
MPa
100 MPa ≤ Rm ≤ 1 300 MPa
This European Standard was approved by CEN on 14 July 2019.

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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3761:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements . 5
Bibliography . 8

European foreword
This document (EN 3761:2020) has been prepared by the Aerospace and Defence Industries Association
of Europe — Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
ASD, prior to its presentation to CEN.
This document shall be given the status of a national standard, either by publication of an identical text
or by endorsement, at the latest by July 2020, and conflicting national standards shall be withdrawn at
the latest by July 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held respons
...