SIST EN 3957:2002

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: 31-Dec-2001
• ICS: 49.025.15 - Non-ferrous alloys in general
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2002
• Due Date: 01-Jan-2002
• Completion Date: 01-Jan-2002
• Ref Project: EN 3957:2001 - Aerospace series - Silver base alloy AG-B14001 (AgCu42Ni2) - Filler metal for brazing - Powder or paste

Overview

SIST EN 3957:2002 is a European standard developed by CEN that specifies the requirements for the silver base alloy AG-B14001 (AgCu42Ni2) used as filler metal for brazing in aerospace applications. This filler metal is supplied in powder or paste form and is designed for high-performance brazing processes, essential for joining critical aerospace components. The standard ensures that the materials meet strict quality, chemical composition, and physical property requirements to maintain safety, reliability, and durability in aerospace manufacturing.

Key Topics

• Material Composition:
  The silver base alloy AG-B14001 consists primarily of 41% minimum silver (Ag), with copper (Cu) at around 42%, nickel (Ni) about 2%, and minor elements such as silicon, phosphorus, and aluminum within tight control limits to ensure optimal brazing performance.

• Forms and Production Methods:
  The filler metal is available as powder or paste.

  • Powder is produced by water or inert gas atomization followed by sieving to achieve precise particle size.
  • Paste is a mixture of atomized powder and binder, facilitating ease of application in brazing operations.

• Physical and Mechanical Requirements:
  The standard defines critical parameters such as melting points (liquidus at 895 °C, solidus at 780 °C), wettability, metallic alloy content (84% for powder and 90% for paste), and batch uniformity to ensure consistent performance.

• Testing and Quality Control:
  SIST EN 3957:2002 references related standards like EN 3875 and EN 2043 for detailed technical specifications, particle size distribution, dimensional inspection, and qualification testing. Material verification and defect inspection procedures are clearly stipulated to maintain quality assurance.

• Application and Use Conditions:
  The filler metal is specially formulated to join carbon steels, low alloy steels, and non-heat treatable austenitic steels commonly used in aerospace manufacturing. The standard recognizes the importance of precise heat treatment and delivery condition codes to match specific customer requirements.

Applications

SIST EN 3957:2002 filler metal is essential for aerospace manufacturing processes involving:

• Brazing of high-strength metallic components in aircraft structures and engine assemblies.
• Joining dissimilar metals where strong, corrosion-resistant, and thermally stable bonds are required.
• Fabrication of heat exchangers, fuel system components, and avionics assemblies where reliability under extreme operating conditions is critical.
• Repair and maintenance of aerospace parts requiring compatible filler metals that meet aviation safety standards.

The powder or paste forms offer versatility, allowing use in automated brazing systems or manual applications depending on production scale and component complexity.

Related Standards

• EN 3875: Aerospace series - Metallic materials - Filler metal for brazing - Technical specification
• EN 2043: Aerospace series - Metallic materials - General requirements for semi-finished product qualification
• EN 4258: Aerospace series - Metallic materials - General organization of standardization - Links between types of EN standards and their use
• EN 4500-6: Aerospace series - Rules for drafting and presentation of material standards - Specific rules for filler metals for brazing

These interconnected standards support a comprehensive quality and compliance framework tailored for aerospace industry needs.

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Keywords: aerospace filler metal, silver base alloy AG-B14001, brazing powder, brazing paste, aerospace brazing standard, SIST EN 3957:2002, silver-copper-nickel alloy, brazing filler metal quality, aerospace manufacturing materials, CEN standards aerospace

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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