EN 3959:2001
(Main)Aerospace series - Cobalt base alloy CO-B41601 (CoCr19Ni17Si8W4) - Filler metal for brazing - Powder or paste
Aerospace series - Cobalt base alloy CO-B41601 (CoCr19Ni17Si8W4) - Filler metal for brazing - Powder or paste
This standard specifies the requirements relating to:
Cobalt base alloy CO-B41601 (CoCr19Ni17Si8W4)
Filler metal for brazing
Powder or paste
for aerospace applications.
Luft- und Raumfahrt - Kobaltbasislegierung CO-B41601 (CoCr19Ni17Si8W4) - Hartlot in Form von Pulver oder Paste
Diese Norm legt die Anforderungen an:
Kobaltbasislegierung CO-B41601 (CoCr19Ni17Si8W4)
Hartlot in Form von Pulver oder Paste
für die Anwendung in der Luft- und Raumfahrt fest.
Série aérospatiale - Alliage base cobalt CO-B41601 (CoCr19Ni17Si8W4) - Métal d'apport de brasage - Poudre ou pâte
Aerospace series - Cobalt base alloy CO-B41601 (CoCr19Ni17Si8W4) - Filler metal for brazing - Powder or paste
General Information
- Status
- Published
- Publication Date
- 19-Jun-2001
- Withdrawal Date
- 30-Dec-2001
- 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
- 14-Apr-2025
Overview
EN 3959:2001 (CEN) is a European aerospace material standard that specifies requirements for the cobalt‑base brazing filler metal CO‑B41601 (CoCr19Ni17Si8W4) supplied as powder or paste. Prepared under the AECMA/CEN framework, the standard covers composition, manufacturing routes, delivery condition and key quality checks for brazing filler used in aerospace joining applications.
Key topics and technical requirements
- Material designation: Cobalt base alloy CO‑B41601, nominal alloy code CoCr19Ni17Si8W4 (chemical composition refers to the metallic alloy content).
- Forms: Supplied as powder or paste (paste = powder mixed with a binder).
- Manufacturing / melting: Powder produced by water or inert‑gas atomisation and sieving; melting may be performed in air, inert gas or vacuum.
- Metallic alloy content: Typical metallic alloy content requirements are specified - powder ≈ 84%, paste ≈ 90% (refers to alloy fraction in the product).
- Thermal analysis: Characteristic temperatures given by differential thermal analysis - liquidus ≈ 1 150 °C, solidus ≈ 1 120 °C.
- Quality and inspection: Requirements for external defects, particle size (sieve analysis), marking and dimensional inspection are referenced to EN 3875 (filler metal technical specification). Wettability (fusion) tests and batch uniformity are also specified by EN 3875 procedures.
- Delivery condition: Supplied “as manufactured” (paste delivered mixed with binder where applicable).
- Qualification and documentation: Product qualification follows EN 2043 general requirements for semi‑finished product qualification; a qualification programme is to be agreed between manufacturer and purchaser.
Applications and users
- Primary use: Brazing and joining of cobalt‑base and other high‑temperature alloys in aerospace components and assemblies.
- Who uses this standard: Aerospace material engineers, brazing process engineers, procurement/specification writers, NADCAP/quality managers, manufacturers of turbine and hot‑section components, and suppliers of filler powders and pastes.
- Practical value: Ensures consistent alloy chemistry, particle characteristics and thermal behavior for reliable brazed joints in critical aerospace environments where high temperature strength and corrosion resistance matter.
Related standards
- EN 3875 - Aerospace series: Filler metal for brazing - Technical specification (referenced for testing, particle size, wettability, inspection)
- EN 2043 - Aerospace series: General requirements for semi‑finished product qualification
- EN 4258, EN 4500‑6 - Series organization and rules for drafting material standards
Keywords: EN 3959:2001, CO‑B41601, CoCr19Ni17Si8W4, cobalt base alloy, brazing filler metal, powder, paste, aerospace standard, CEN, AECMA.
Frequently Asked Questions
EN 3959:2001 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Cobalt base alloy CO-B41601 (CoCr19Ni17Si8W4) - Filler metal for brazing - Powder or paste". This standard covers: This standard specifies the requirements relating to: Cobalt base alloy CO-B41601 (CoCr19Ni17Si8W4) Filler metal for brazing Powder or paste for aerospace applications.
This standard specifies the requirements relating to: Cobalt base alloy CO-B41601 (CoCr19Ni17Si8W4) Filler metal for brazing Powder or paste for aerospace applications.
EN 3959:2001 is classified under the following ICS (International Classification for Standards) categories: 49.025.15 - Non-ferrous alloys in general. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 3959:2001 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Cobalt base alloy CO-B41601 (CoCr19Ni17Si8W4) - Filler metal for brazing - Powder or pasteLuft- und Raumfahrt - Kobaltbasislegierung CO-B41601 (CoCr19Ni17Si8W4) - Hartlot in Form von Pulver oder PasteSérie aérospatiale - Alliage base cobalt CO-B41601 (CoCr19Ni17Si8W4) - Métal d'apport de brasage - Poudre ou pâteAerospace series - Cobalt base alloy CO-B41601 (CoCr19Ni17Si8W4) - Filler metal for brazing - Powder or paste49.025.15Neželezove zlitine na splošnoNon-ferrous alloys in generalICS:Ta slovenski standard je istoveten z:EN 3959:2001SIST EN 3959:2002en01-januar-2002SIST EN 3959:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3959June 2001ICS 49.025.15English versionAerospace series - Cobalt base alloy CO-B41601(CoCr19Ni17Si8W4) - Filler metal for brazing - Powder or pasteSérie aérospatiale - Alliage base cobalt CO-B41601(CoCr19Ni17Si8W4) - Métal d'apport de brasage - Poudreou pâteLuft- und Raumfahrt - Kobaltbasislegierung CO-B41601(CoCr19Ni17Si8W4) - 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 3959:2001 ESIST EN 3959:2002
Page 2EN 3959:2001ForewordThis 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.SI
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