SIST EN 3937:2002

Aerospace series - Nickel base alloy NI-B44101 (NiW12Cr10Si4Fe3B3) - Filler metal for brazing - Powder or paste

This standard specifies the requirements relating to:
Nickel base alloy NI-B44101 (NiW12Cr10Si4Fe3B3)
Filler metal for brazing
Powder or paste
for aerospace applications.

Luft- und Raumfahrt - Nickelbasislegierung NI-B44101 (NiW12Cr10Si4Fe3B3) - Hartlot in Form von Pulver oder Paste

Diese Norm legt die Anforderungen an:
Nickelbasislegierung NI-B44101 (NiW12Cr10Si4Fe3B3)
Hartlot in Form von Pulver oder Paste
für die Anwendung in der Luft- und Raumfahrt fest.

Série aérospatiale - Alliage base nickel NI-B44101 (NiW12Cr10Si4Fe3B3) - Métal d'apport de brasage - Poudre ou pâte

Aerospace series - Nickel base alloy NI-B44101 (NiW12Cr10Si4Fe3B3) - 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 3937:2001 - Aerospace series - Nickel base alloy NI-B44101 (NiW12Cr10Si4Fe3B3) - Filler metal for brazing - Powder or paste

Overview

SIST EN 3937:2002 is a European Standard developed by the European Committee for Standardization (CEN) that specifies the requirements for the aerospace-grade nickel base alloy NI-B44101 (NiW12Cr10Si4Fe3B3). This alloy is used as a filler metal for brazing in powder or paste form, designed specifically for aerospace applications. The standard ensures uniformity and quality in the brazing filler metal, which is critical for fabricating and repairing high-temperature and high-strength components in the aerospace industry.

Key Topics

• Material Composition
  EN 3937 defines the chemical characteristics of nickel base alloy NI-B44101, including precise elemental percentages such as nickel (base), tungsten (W), chromium (Cr), silicon (Si), iron (Fe), and boron (B). This controlled composition guarantees consistent performance in brazing processes.

• Forms and Production Methods
  The filler metal is available as powder or paste. Powder form is produced by atomisation using water or inert gas, followed by sieving for particle size control. The paste is similarly produced powder mixed with a binder for ease of application.

• Technical Specifications and Testing
  The standard aligns with EN 3875 technical specifications for filler metals, including requirements for heat treatment, mechanical properties (proof stress, tensile strength, hardness, elongation), and environmental resistance. It also specifies the appropriate methods for testing, such as thermal analysis, wettability, and batch uniformity to ensure quality control.

• Dimensions and Marking
  EN 3937 details acceptable dimensional tolerances, cladding thickness, and particle size analysis, along with requirements for product marking and inspection, which supports traceability and quality assurance.

• Quality and Delivery Conditions
  Delivery conditions are specified, including as-manufactured states with or without binders, ensuring the filler metal is ready for immediate aerospace brazing applications.

Applications

• Aerospace Manufacturing
  EN 3937 filler metals are primarily used for brazing heat-resistant steels and nickel or cobalt-based alloys, which are common in aerospace engine components, airframe structures, and high-temperature assemblies.

• Component Repair
  This standard’s filler metals are suitable for maintenance and repair operations within aerospace, providing reliable joints and extending the service life of critical parts.

• High-Temperature Joints
  The nickel-based brazing alloys specified are ideal for joining components that must withstand high temperatures, mechanical stress, and corrosive environments typical in aviation and space technologies.

Related Standards

• EN 3875 – Aerospace series – Filler metals for brazing – Technical specification: EN 3937 references and complements this standard to detail filler metal requirements.

• EN 2043 – Aerospace series – Metallic materials – General requirements for semi-finished product qualification.

• EN 4258 – Aerospace series – Metallic materials – Standardization organization and framework for the series.

• EN 4500-6 – Aerospace series – Rules for drafting and presentation of material standards, specifically for filler metals.

---

Keywords: EN 3937, nickel base alloy NI-B44101, aerospace filler metal, brazing powder, brazing paste, aerospace standards, brazing alloy for aerospace, nickel brazing alloy, high-temperature filler metal, aerospace manufacturing materials, nickel base brazing filler

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Nickel base alloy NI-B44101 (NiW12Cr10Si4Fe3B3) - Filler metal for brazing - Powder or pasteLuft- und Raumfahrt - Nickelbasislegierung NI-B44101 (NiW12Cr10Si4Fe3B3) - Hartlot in Form von Pulver oder PasteSérie aérospatiale - Alliage base nickel NI-B44101 (NiW12Cr10Si4Fe3B3) - Métal d'apport de brasage - Poudre ou pâteAerospace series - Nickel base alloy NI-B44101 (NiW12Cr10Si4Fe3B3) - Filler metal for brazing - Powder or paste49.025.15Neželezove zlitine na splošnoNon-ferrous alloys in generalICS:Ta slovenski standard je istoveten z:EN 3937:2001SIST EN 3937:2002en01-januar-2002SIST EN 3937:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3937June 2001ICS 49.025.15English versionAerospace series - Nickel base alloy NI-B44101(NiW12Cr10Si4Fe3B3) - Filler metal for brazing - Powder orpasteSérie aérospatiale - Alliage base nickel NI-B44101(NiW12Cr10Si4Fe3B3) - Métal d'apport de brasage -Poudre ou pâteLuft- und Raumfahrt - Nickelbasislegierung NI-B44101(NiW12Cr10Si4Fe3B3) - Hartlot in Form von Pulver oderPasteThis 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 3937:2001 ESIST EN 3937:2002

Page 2EN 3937:2001ForewordThis 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 EN
...