SIST EN 4250:2002

Aerospace series - Nickel base alloys NI-B41001 (NiCr19Si7B) - Filler metal for brazing - Amorphous foil

This standard specifies the requirements relating to:
Nickel base alloy NI-B41001 (NiCr19Si7B)
Filler metal for brazing
Amorphous foil
for aerospace applications.

Luft- und Raumfahrt - Nickelbasislegierung NI-B41001 (NiCr19Si7B) - Hartlot in Form von amorpher Folie

Diese Norm legt die Anforderungen an:
Nickelbasislegierung NI-B41001 (NiCr19Si7B)
Hartlot in Form von
amorpher Folie
für die Anwendung in der Luft- und Raumfahrt fest.

Série aérospatiale - Alliage base nickel NI-B41001 (NiCr19Si7B) - Métal d'apport de brasage - Feuillard amorphe

Cette norme spécifie les exigences relatives à :
Alliage base nickel NI-B41001 (NiCr19Si7B)
Métal d'apport de brasage
Feuillard amorphe
pour les applications aérospatiales.

Aerospace series - Nickel base alloys NI-B41001 (NiCr19Si7B) - Filler metal for brazing - Amorphous 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 4250:2001 - Aerospace series - Nickel base alloys NI-B41001 (NiCr19Si7B) - Filler metal for brazing - Amorphous foil

Overview

SIST EN 4250:2002 is a European standard developed by CEN that specifies the requirements for the aerospace-grade nickel base alloy NI-B41001 (NiCr19Si7B) used as a filler metal for brazing. This standard specifically covers the form of the filler metal as an amorphous foil, designed to meet the stringent demands of aerospace applications. The standard is part of a comprehensive series on metallic materials for aerospace, ensuring compatibility and quality aligned with other EN aerospace standards.

This specification governs the chemical composition, production methods, delivery conditions, and testing protocols necessary to guarantee performance and reliability when joining nickel and cobalt base alloys in aerospace components.

Key Topics

• Material Composition
  EN 4250 defines the precise chemical composition of nickel base alloy NI-B41001, including critical elements such as Nickel (Ni), Chromium (Cr), Silicon (Si), and Boron (B). This alloy is tailored to optimize brazing characteristics while meeting aerospace durability requirements.

• Form and Production
  The filler metal is supplied in the form of an amorphous foil produced via melt spinning, a rapid solidification technique that imparts unique amorphous properties for improved brazing performance.

• Melting Methods
  The alloy may be produced via air melting, inert gas melting, or vacuum melting processes to maintain purity and ensure consistent quality.

• Technical Specifications
  EN 4250 references EN 3875 for detailed technical requirements related to filler metals for brazing, covering mechanical properties, shear strength, formability, wettability, porosity, and dimensional inspections.

• Thermal Properties
  The standard outlines liquidus and solidus temperatures (approximately 1150°C and 1065°C respectively), which are critical for controlling brazing processes.

• Testing and Quality Control
  The standard incorporates tests such as differential thermal analysis, fusion tests for wettability, flexibility tests for formability, and batch uniformity inspections to verify the filler metal's consistency and performance.

Applications

SIST EN 4250:2002 is essential for the aerospace industry, where the reliable joining of high-performance metals is critical. Applications include:

• Brazing of Nickel and Cobalt Base Alloys
  Specifically designed for brazing superalloys and corrosion-resistant components commonly found in turbine engines, airframe structures, and other aerospace assemblies.

• Aerospace Manufacturing
  Suitable for use in the production and repair of aerospace components where superior mechanical strength and resistance to high-temperature oxidation and corrosion are required.

• Maintenance and Repair
  Enables precise and consistent filler metal application during routine maintenance or refurbishment of critical aerospace parts.

Related Standards

EN 4250 integrates with and references several other standards in the aerospace series to ensure comprehensive quality and performance management:

• EN 3875 – Aerospace series: Metallic materials - Filler metal for brazing - Technical specification, which provides detailed requirements on filler metal properties, testing, and acceptance criteria.

• EN 2043 – Aerospace series: Metallic materials - General requirements for semi-finished product qualification (excluding forgings and castings), guiding qualification protocols.

• EN 4258 – General organization of standardization for aerospace metallic materials, explaining the structure of the EN aerospace standards series.

• EN 4500-6 – Rules for drafting and presentation of materials standards specifically for filler metals used in brazing.

By aligning with these standards, EN 4250 ensures that the nickel base alloy amorphous foil filler metal meets industry-wide quality benchmarks, facilitating interoperability and regulatory compliance in aerospace manufacturing.

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Keywords: EN 4250, nickel base alloy, NI-B41001, NiCr19Si7B, aerospace filler metal, brazing foil, amorphous foil, aerospace brazing standard, CEN aerospace, nickel alloy brazing, aerospace manufacturing materials, superalloy filler metal

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2002
Aerospace series - Nickel base alloys NI-B41001 (NiCr19Si7B) - Filler metal for
brazing - Amorphous foil
Aerospace series - Nickel base alloys NI-B41001 (NiCr19Si7B) - Filler metal for brazing -
Amorphous foil
Luft- und Raumfahrt - Nickelbasislegierung NI-B41001 (NiCr19Si7B) - Hartlot in Form
von
amorpher Folie
Série aérospatiale - Alliage base nickel NI-B41001 (NiCr19Si7B) - Métal d'apport de
brasage - Feuillard amorphe
Ta slovenski standard je istoveten z: EN 4250:2001
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 4250
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2001
ICS 49.025.15
English version
Aerospace series - Nickel base alloys NI-B41001 (NiCr19Si7B) -
Filler metal for brazing - Amorphous foil
Série aérospatiale - Alliage base nickel NI-B41001 Luft- und Raumfahrt - Nickelbasislegierung NI-B41001
(NiCr19Si7B) - Métal d'apport de brasage - Feuillard (NiCr19Si7B) - Hartlot in Form von amorpher Folie
amorphe
This European Standard was approved by CEN on 2 May 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 4250:2001 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.
...