EN 3957:2001

Aerospace series - Silver base alloy AG-B14001 (AgCu42Ni2) - Filler metal for brazing - Powder or paste

This standard specifies the requirements relating to:
Silver base alloy AG-B14001 (AgCu42Ni2)
Filler metal for brazing
Powder or paste
for aerospace applications.

Luft- und Raumfahrt - Silberbasislegierung AG-B14001 (AgCu42Ni2) - Hartlot in Form von Pulver oder Paste

Diese Norm legt die Anforderungen an:
Silberbasislegierung AG-B14001 (AgCu42Ni2)
Hartlot in Form von Pulver oder Paste
für die Anwendung in der Luft- und Raumfahrt fest.

Série aérospatiale - Alliage base argent AG-B14001 (AgCu42Ni2) - Métal d'apport de brasage - Poudre ou pâte

Aerospace series - Silver base alloy AG-B14001 (AgCu42Ni2) - Filler metal for brazing - Powder or paste

General Information

• Status: Published
• Publication Date: 19-Jun-2001
• Withdrawal Date: 30-Dec-2001
• ICS: 49.025.15 - Non-ferrous alloys in general
• 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: 11-Feb-2026
• Ref Project: SIST EN 3957:2002 - Aerospace series - Silver base alloy AG-B14001 (AgCu42Ni2) - Filler metal for brazing - Powder or paste

Relations

• Refers: 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

Overview

EN 3957:2001 is a European standard developed by CEN for the aerospace industry, focusing on the requirements and specifications for silver base alloy AG-B14001 (AgCu42Ni2) used as a filler metal for brazing, available in powder or paste form. This standard helps ensure quality, consistency, and safety for brazing materials employed in critical aerospace components. EN 3957:2001 forms part of a broader series of standards for metallic materials within aerospace applications, streamlining material qualification and offering guidance for both manufacturers and end users.

Key Topics

• Material Specification:
  Defines the composition and form of silver base alloy AG-B14001 (AgCu42Ni2), strictly controlling the material’s chemical makeup and physical properties for use in demanding aerospace environments.
• Forms and Production:
  Covers powder and paste forms, produced through water or inert gas atomization and appropriate sieving; paste form involves mixing with a suitable binder.
• Manufacturing Methods:
  Specifications for melting (air or inert gas), as well as atomization methods, to ensure uniformity and high performance of the filler metal.
• Testing and Quality Control:
  Includes requirements for:
  • Batch uniformity
  • Thermal analysis (liquidus and solidus temperature)
  • Metallic alloy content
  • Particle size and sieve analysis
  • Marking and dimensional inspection
• Application Conditions:
  Provides guidance on delivery condition, heat treatment, and suitable base materials for the filler metal, targeting carbon steels, low alloy steels, and austenitic (non-heat-treatable) steels commonly used in aerospace structures.

Applications

• Aerospace Manufacturing:
  EN 3957:2001 is essential for manufacturers producing or repairing components such as parts of aircraft fuselages, engine parts, and critical assemblies requiring strong, reliable joints via brazing.
• Maintenance and Repair:
  Ensures that maintenance operations on aerospace structures use brazing alloys meeting strict safety and performance criteria, promoting durability and compliance with international standards.
• Component Qualification:
  Used by quality assurance personnel to verify conformity of filler metals during procurement and inspection, playing a direct role in product qualification and certification processes within aerospace projects.
• Supplier and Procurement Guidance:
  Offers a reference for aerospace material suppliers and purchasers, ensuring that supplied filler metals have consistent properties and are fully traceable to recognized standards.

Related Standards

Professionals working with EN 3957:2001 often refer to the following related standards for a comprehensive approach to material selection and process control:

• EN 2043: General requirements for qualification of semi-finished metallic products, providing frameworks for acceptance and quality assurance.
• EN 3875: Technical specifications for metallic filler metals used in brazing for aerospace, covering properties, delivery conditions, and testing procedures.
• EN 4258: Organization and classification of metallic materials standards within the aerospace sector, assisting in navigation and application of multiple EN standards.
• EN 4500-6: Rules for drafting and presenting material standards for filler metals for brazing, ensuring technical documents are clear and harmonized.

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EN 3957:2001 is vital for aerospace enterprises aiming for reliability and regulatory compliance when using silver base alloy AG-B14001 (AgCu42Ni2) as a brazing filler metal, supporting safer, more consistent aerospace component manufacturing and maintenance.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Silver base alloy AG-B14001 (AgCu42Ni2) - Filler metal for brazing - Powder or pasteLuft- und Raumfahrt - Silberbasislegierung AG-B14001 (AgCu42Ni2) - Hartlot in Form von Pulver oder PasteSérie aérospatiale - Alliage base argent AG-B14001 (AgCu42Ni2) - Métal d'apport de brasage - Poudre ou pâteAerospace series - Silver base alloy AG-B14001 (AgCu42Ni2) - Filler metal for brazing - Powder or paste49.025.15Neželezove zlitine na splošnoNon-ferrous alloys in generalICS:Ta slovenski standard je istoveten z:EN 3957:2001SIST EN 3957:2002en01-januar-2002SIST EN 3957:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3957June 2001ICS 49.025.15English versionAerospace series - Silver base alloy AG-B14001 (AgCu42Ni2) -Filler metal for brazing - Powder or pasteSérie aérospatiale - Alliage base argent AG-B14001(AgCu42Ni2) - Métal d'apport de brasage - Poudre ou pâteLuft- und Raumfahrt - Silberbasislegierung AG-B14001(AgCu42Ni2) - Hartlot in Form von Pulver oder PasteThis European Standard was approved by CEN on 19 April 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 3957:2001 ESIST EN 3957:2002

Page 2EN 3957:2001ForewordThis European Standard has been prepared by the European Association of Aerospace Manufacturers(AECMA).After inquiries and votes carried out in accordance with the rules of this Association, this Standard hasreceived the approval of the National Associations and the Official Services of the member countries ofAECMA, prior to its presentation to CEN.This European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by December 2001, and conflicting national standards shall bewithdrawn at the latest by December 2001.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,Spain, Sweden, Switzerland and the United Kingdom.SIST EN 3
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