SIST EN 3955:2002

Aerospace series - Silver base alloy AG-B12401 (AgCu40Zn5Ni) - Filler metal for brazing - Rolled foil

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

Luft- und Raumfahrt - Silberbasislegierung AG-B12401 (AgCu40Zn5Ni) - Hartlot in Form von gewalzter Folie

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

Série aérospatiale - Alliage base argent AG-B12401 (AgCu40Zn5Ni) - Métal d'apport de brasage - Feuillard laminé

Aerospace series - Silver base alloy AG-B12401 (AgCu40Zn5Ni) - Filler metal for brazing - Rolled foil

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 3955:2001 - Aerospace series - Silver base alloy AG-B12401 (AgCu40Zn5Ni) - Filler metal for brazing - Rolled foil

Relations

• 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

Overview

SIST EN 3955:2002 is a key standard in the aerospace sector, defining the requirements for the silver base alloy AG-B12401 (AgCu40Zn5Ni) used as a filler metal for brazing in the form of rolled foil. Implemented by the Slovenian Institute for Standardization (SIST), this standard is harmonized with the European Standard EN 3955:2001. Its primary focus lies in ensuring optimal performance and reliability of brazed joints in demanding aerospace applications by prescribing the properties and criteria for silver-based alloys used in brazing.

Key Topics

This standard addresses several critical aspects related to silver base alloy filler metals in aerospace:

• Material Requirements: Specifies the chemical composition of AG-B12401, a silver-copper-zinc-nickel alloy designed for high-quality brazing.
• Form and Condition: Covers the requirements for rolled foil, ensuring uniform thickness, quality, and properties suitable for aerospace manufacturing processes.
• Brazing Properties: Outlines the filler metal characteristics that affect the integrity and strength of brazed joints, such as melting range, flow, and compatibility with base materials.
• Quality Assurance: Provides guidelines to maintain consistency, reliability, and traceability throughout production and application, reinforcing the safety and durability of aerospace components.

Applications

The SIST EN 3955:2002 standard is widely implemented in the aerospace industry, particularly for:

• Fabrication of Aircraft Components: Rolled foil AG-B12401 is utilized in assembling parts where strong, corrosion-resistant brazed joints are critical.
• Repair and Maintenance: The standard supports the use of approved filler metals for refurbishment and repair of existing aerospace structures.
• Missile and Spacecraft Manufacturing: Ensures joints exhibit high temperature resistance and mechanical strength required for extreme environments.
• Precision Assemblies: Ideal for complex and thin-walled constructions where traditional welding is not suitable.

By using the silver base alloy defined in this standard, manufacturers achieve:

• Consistent braze quality
• Enhanced joint strength and ductility
• Reliable corrosion resistance

Related Standards

For comprehensive quality control and integration, SIST EN 3955:2002 is typically used alongside other aerospace and alloy standards, including:

• EN 1044 - Brazing filler metals: General requirements for filler metals in brazing processes.
• ISO 18279 - Brazing - Quality requirements and inspection.
• EN 24034 - Aerospace series - Filler metal for brazing - Technical delivery conditions.
• ISO 17672 - Filler metals for brazing - Classification and requirements.
• SIST EN 22553 - Aerospace series - Non-ferrous alloys.

These related standards help ensure that all aspects of brazing operations-materials, processes, and inspections-meet international aerospace quality and safety requirements.

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Adopting SIST EN 3955:2002 supports manufacturers, engineers, and quality assurance professionals in delivering reliable, high-performing aerospace components, reinforcing safety and performance across the aviation and aerospace industries.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Silver base alloy AG-B12401 (AgCu40Zn5Ni) - Filler metal for brazing - Rolled foilLuft- und Raumfahrt - Silberbasislegierung AG-B12401 (AgCu40Zn5Ni) - Hartlot in Form von gewalzter FolieSérie aérospatiale - Alliage base argent AG-B12401 (AgCu40Zn5Ni) - Métal d'apport de brasage - Feuillard laminéAerosp
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