SIST EN 3922:2001

• Abstract:

  This standard specifies the requirements relating to: Nickel base alloy NI-B41203 (NiCr7Si5B3) - Filler metal for brazing - Borided foil for aerospace applications.

• Status: Published
• Publication Date: 31-Dec-2000
• ICS: 49.025.99 - Other materials
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2001
• Due Date: 01-Jan-2001
• Completion Date: 01-Jan-2001
• Ref Project: EN 3922:1998 - Aerospace series - Nickel base alloy Ni-B41203 (NiCr7Si5B3) - Filler metal for brazing - Borided foil

• Refers: SIST EN 2043:2014 - Aerospace series - Metallic materials - General requirements for semi-finished product qualification (excluding forgings and castings)
• Effective Date: 28-Jan-2026
• 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 3922:2001 is a European standard issued by CEN that specifies the requirements for a specialized nickel base alloy filler metal used in brazing applications within the aerospace industry. The standard focuses on the Ni-B41203 (NiCr7Si5B3) alloy in the form of borided foil, ensuring it meets stringent performance and quality criteria necessary for critical aerospace components.

This standard is part of the aerospace series and establishes essential guidelines for the composition, properties, and application of borided nickel-based brazing foils. Its adoption supports high reliability, heat resistance, and corrosion performance demanded by aerospace manufacturing and repair processes.

Key Topics

• Material Specification: Detailed description of nickel base alloy Ni-B41203 (NiCr7Si5B3), including its chemical composition and microstructure requirements to guarantee optimal brazing performance.
• Borided Foil Form: Defines the physical form of the filler metal as borided foil, which enhances wetting and joint strength in brazed assemblies.
• Quality Requirements: Sets out standards for foil thickness, cleanliness, mechanical properties, and consistency to assure reproducibility and compatibility with aerospace grade materials.
• Performance Criteria: Establishes criteria for brazed joint integrity, resistance to high temperature oxidation, and mechanical durability essential for aerospace environments.
• Compliance and Testing: Provides guidelines for testing methods and certification to ensure each batch of filler metal complies with the defined technical requirements.

Applications

SIST EN 3922:2001 is critical for aerospace manufacturers and maintenance providers focusing on:

• Brazing of High-Temperature Components: Suitable for joining nickel base superalloys and other heat-resistant materials used in jet engines, turbines, and exhaust systems.
• Aerostructure Assembly: Used for brazed joints requiring high strength and resistance to oxidation and thermal cycling.
• Repair and Maintenance: Provides reliable filler material for refurbishing aerospace parts subjected to extreme mechanical and environmental conditions.
• Precision Joinery: Enables producing thin, high-quality filler metal layers that contribute to lightweight yet robust aerospace structures.

This standard ensures that brazed joints in aerospace components maintain integrity under demanding operational conditions, improving safety and performance.

Related Standards

For comprehensive aerospace brazing and materials management, consider these complementary standards:

• EN 5116 – Nickel and nickel alloys for aerospace brazing filler metals.
• EN ISO 17672 – Brazing - Filler metals.
• EN 288 Series – Specification and qualification of brazing procedures.
• AMS 4789 – Aerospace nickel alloy brazing foil specifications.

Adhering to SIST EN 3922:2001 in conjunction with these standards optimizes the brazing process and guarantees material compatibility across aerospace manufacturing and repair sectors.

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Keywords: SIST EN 3922:2001, nickel base alloy, Ni-B41203, NiCr7Si5B3, filler metal, brazing, borided foil, aerospace brazing, brazing filler metal, aerospace materials, CEN standard, high-temperature brazing, aerospace manufacturing, brazed joints, heat-resistant alloys

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Nickel base alloy Ni-B41203 (NiCr7Si5B3) - Filler metal for brazing - Borided foilLuft- und Raumfahrt - Nickelbasislegierung NI-B41203 (NiCr7Si5B3) - Hartlot in Form von borierter FolieSérie aérospatiale - Alliage base nickel NI-B41203 (NiCr7Si5B3) - Métal d'apport de brasage - Feuillard
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