SIST EN 3954:2002

Aerospace series - Silver base alloy AG-B12401 (AgCu40Zn5Ni) - Filler metal for brazing - Powder or paste

This standard specifies the requirements relating to:
Silver base alloy AG-B12401 (AgCu40Zn5Ni)
Filler metal for brazing
Powder or paste
for aerospace applications.

Luft- und Raumfahrt - Silberbasislegierung AG-B12401 (AgCu40Zn5Ni) - Hartlot in Form von Pulver oder Paste

Diese Norm legt die Anforderungen an:
Silberbasislegierung AG-B12401 (AgCu40Zn5Ni)
Hartlot in Form von Pulver oder Paste
für die Anwendung in der Luft- und Raumfahrt fest.

Série aérospatiale - Alliage base argent AG-B12401 (AgCu40Zn5Ni) - Métal d'apport de brasage - Poudre ou pâte

Aerospace series - Silver base alloy AG-B12401 (AgCu40Zn5Ni) - 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 3954:2001 - Aerospace series - Silver base alloy AG-B12401 (AgCu40Zn5Ni) - Filler metal for brazing - Powder or paste

Overview

EN 3954:2001 (Aerospace series) defines the requirements for the silver‑base filler metal AG‑B12401 (AgCu40Zn5Ni) used for brazing in aerospace applications. The standard covers the material in powder and paste forms and specifies chemical, production and inspection requirements intended for high‑reliability aerospace joining processes.

Key topics and requirements

• Material designation: Silver base brazing alloy AG‑B12401 (AgCu40Zn5Ni).
• Chemical and metallurgical data: The standard gives the alloy chemistry ranges and identifies that the chemical composition refers to the metallic alloy content.
• Melting and thermal properties:
  • Method of melting: Air or inert‑gas melted.
  • Solidus: 720 °C; Liquidus: 855 °C (thermal analysis per EN 3875).
• Forms and production:
  • Powder: Water or inert‑gas atomised and sieved.
  • Paste: Same atomised powder mixed with a binder.
• Metallic alloy content: Specified minimums for product types (example values in the standard: powder ≥ 84%, paste ≥ 90%).
• Quality and inspection: Requirements for particle size (sieve analysis), batch uniformity, external defect limits, wettability (fusion test), dimensional and marking inspections - many checks are performed to EN 3875 technical specifications.
• Delivery and qualification: Delivery conditions, heat treatment codes and product qualification procedures are defined or referenced; product qualification follows EN 2043 and is to be agreed between manufacturer and purchaser.
• Intended base metals: Typical use is for joining carbon steels, low‑alloy steels and austenitic steels in aerospace assemblies.

Practical applications

• Brazing of structural and non‑structural components in aircraft and aerospace systems where a silver‑based filler provides reliable joints and compatible melting range.
• Use as a brazing powder for automated or powder‑feed processes and as a brazing paste where controlled application, handling and gap filling are required.
• Repair, overhaul and manufacturing operations in aerospace supply chains that require standardized filler metal specifications and traceable batch quality.

Who should use EN 3954

• Aerospace manufacturers and OEMs specifying brazing consumables.
• Filler‑metal manufacturers and suppliers producing AG‑B12401 powder or paste.
• Quality, procurement and certification teams in aerospace maintenance, repair and overhaul (MRO) facilities.
• Metallurgists and process engineers developing brazing procedures for carbon, low‑alloy and austenitic steels.

Related standards

• EN 3875 - Filler metal for brazing: technical specification (inspection & tests)
• EN 2043 - Metallic materials: general requirements for semi‑finished product qualification
• EN 4258, EN 4500‑6 - Organization and drafting rules for aerospace metallic material standards

Keywords: EN 3954, AG‑B12401, AgCu40Zn5Ni, silver base alloy, filler metal for brazing, brazing powder, brazing paste, aerospace brazing, liquidus, solidus, EN 3875, EN 2043.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2002
Aerospace series - Silver base alloy AG-B12401 (AgCu40Zn5Ni) - Filler metal for
brazing - Powder or paste
Aerospace series - Silver base alloy AG-B12401 (AgCu40Zn5Ni) - Filler metal for brazing
- Powder or paste
Luft- und Raumfahrt - Silberbasislegierung AG-B12401 (AgCu40Zn5Ni) - Hartlot in Form
von Pulver oder Paste
Série aérospatiale - Alliage base argent AG-B12401 (AgCu40Zn5Ni) - Métal d'apport de
brasage - Poudre ou pâte
Ta slovenski standard je istoveten z: EN 3954:2001
ICS:
49.025.15 Neželezove zlitine na Non-ferrous alloys in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 3954
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2001
ICS 49.025.15
English version
Aerospace series - Silver base alloy AG-B12401 (AgCu40Zn5Ni)
- Filler metal for brazing - Powder or paste
Série aérospatiale - Alliage base argent AG-B12401 Luft- und Raumfahrt - Silberbasislegierung AG-B12401
(AgCu40Zn5Ni) - Métal d'apport de brasage - Poudre ou (AgCu40Zn5Ni) - Hartlot in Form von Pulver oder Paste
pâte
This 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 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 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 Management Centre has the same status as the official
versions.
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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3954:2001 E
worldwide for CEN national Members.

Page 2
Foreword
This 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 has
received the approval of the National Associations and the Official Services of the member countries of
AECMA, prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by December 2001, and conflicting national standards shall be
withdrawn at the latest by December 2001.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries 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.

Page 3
0 Introduction
This standard is part of the series of EN metallic material stan
...