EN 3936:2001

Aerospace series - Nickel base alloy NI-B21001 (NiCr15B4) - Filler metal for brazing - Powder or paste

This standard specifies the requirements relating to:
Nickel base alloy NI-B21001 (NiCr15B4)
Filler metal for brazing
Powder or paste
for aerospace applications.

Luft- und Raumfahrt - Nickelbasislegierung NI-B21001 (NiCr15B4) - Hartlot in Form von Pulver oder Paste

Diese Norm legt die Anforderungen an:
Nickelbasislegierung NI-B21001 (NiCr15B4)
Hartlot in Form von Pulver oder Paste
für die Anwendung in der Luft- und Raumfahrt fest.

Série aérospatiale - Alliage base nickel NI-B21001 (NiCr15B4) - Métal d'apport de brasage - Poudre ou pâte

Aerospace series - Nickel base alloy NI-B21001 (NiCr15B4) - Filler metal for brazing - Powder or paste

General Information

• Status: Published
• Publication Date: 19-Jun-2001
• Withdrawal Date: 30-Dec-2001
• ICS: 49.025.15 - Non-ferrous alloys in general
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 4 - Metallic
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 01-Jun-2017
• Completion Date: 11-Feb-2026
• Ref Project: SIST EN 3936:2002 - Aerospace series - Nickel base alloy NI-B21001 (NiCr15B4) - Filler metal for brazing - Powder or paste

Relations

• Refers: 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

EN 3936:2001 is a European standard developed by the European Committee for Standardization (CEN) that specifies requirements for the nickel base alloy NI-B21001 (NiCr15B4) when used as a filler metal for brazing. This standard is tailored specifically for aerospace applications, addressing both powder and paste forms of the alloy to ensure quality and reliability in joining high-performance components. As part of the broader aerospace series of metallic material standards, EN 3936:2001 plays a key role in supporting the safety, durability, and performance of non-ferrous alloys in critical aviation and aerospace assemblies.

Key Topics

The main considerations covered by EN 3936:2001 include:

• Material designation: Specifies NI-B21001 (NiCr15B4) as the designated nickel base braze alloy.
• Forms and production:
  • Powder produced by water or inert gas atomization and sieving.
  • Paste produced similarly and mixed with a suitable binder.
• Technical specification requirements: References EN 3875 for filler metals and outlines delivery conditions, heat treatment, and testing protocols.
• Manufacturing methods: Permits air, inert gas, or vacuum melting to ensure alloy purity and consistent properties.
• Quality requirements:
  • Particle size distribution (sieve analysis and batch uniformity).
  • Metallic alloy content, with a typical content of 84-90% in powder or paste.
  • Inspection for external defects and adherence to thermal and wettability properties, referencing other EN aerospace materials standards.
• Qualification: Product qualification procedures must comply with EN 2043, with specific programmes to be agreed upon between the manufacturer and purchaser.

Applications

The NI-B21001 (NiCr15B4) alloy covered by EN 3936:2001 is primarily used as a brazing filler metal in aerospace engineering, where robust and heat-resistant joints are essential. Key practical applications include:

• Joining nickel and cobalt base superalloys commonly used in jet engines, turbine blades, and other high-temperature environments.
• Repair operations requiring reliable joints without compromising the integrity of critical aerospace components.
• Thermal and mechanical assemblies where filler metals must withstand extreme operating conditions and provide strong, corrosion-resistant bonds.

By specifying powder and paste forms, this standard accommodates a range of automated and manual brazing processes, contributing to manufacturing efficiency, material compatibility, and structural integrity in aerospace projects.

Related Standards

Compliance with EN 3936:2001 is closely linked to several other key European aerospace standards, including:

• EN 3875: Aerospace series - Metallic materials - Filler metal for brazing - Technical specification. Sets forth broader technical requirements for brazing fillers.
• EN 2043: Aerospace series - Metallic materials - General requirements for semi-finished product qualification. Addresses qualification protocols for non-cast, non-forged materials.
• EN 4258: Aerospace series - Metallic materials - General organization of standardization. Clarifies links between types of EN standards for consistent materials use.
• EN 4500-6: Aerospace series - Metallic materials - Rules for drafting and presentation of material standards - Part 6: Specific rules for filler metals for brazing.

Together, these standards form a robust framework to guarantee the quality, traceability, and performance of filler metals used throughout the aerospace sector.

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By specifying strict requirements for nickel base alloy NI-B21001 filler metals, EN 3936:2001 supports reliability, safety, and consistency in high-performance aerospace assemblies, driving excellence in non-ferrous alloy joining technology.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Nickel base alloy NI-B21001 (NiCr15B4) - Filler metal for brazing - Powder or pasteLuft- und Raumfahrt - Nickelbasislegierung NI-B21001 (NiCr15B4) - Hartlot in Form von Pulver oder PasteSérie aérospatiale - Alliage base nickel NI-B21001 (NiCr15B4) - Métal d'apport de brasage - Poudre ou pâteAerospace series - Nickel base alloy NI-B21001 (NiCr15B4) - Filler metal for brazing - Powder or paste49.025.15Neželezove zlitine na splošnoNon-ferrous alloys in generalICS:Ta slovenski standard je istoveten z:EN 3936:2001SIST EN 3936:2002en01-januar-2002SIST EN 3936:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3936June 2001ICS 49.025.15English versionAerospace series - Nickel base alloy NI-B21001 (NiCr15B4) -Filler metal for brazing - Powder or pasteSérie aérospatiale - Alliage base nickel NI-B21001(NiCr15B4) - Métal d'apport de brasage - Poudre ou pâteLuft- und Raumfahrt - Nickelbasislegierung NI-B21001(NiCr15B4) - 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 3936:2001 ESIST EN 3936:2002

Page 2EN 3936:2001ForewordThis 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
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