SIST EN 3963:2002

• Abstract:

  This standard specifies the requirements relating to:; Copper CU-BU9001; Filler metal for brazing; Rolled foil; for aerospace applications.

• 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 3963:2001 - Aerospace series - Copper CU-BU9001 - Filler metal for brazing - Rolled foil

• 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

SIST EN 3963:2002 is the Slovenian adoption of EN 3963:2001, issued by SIST for aerospace materials. It specifies the requirements for Copper CU-BU9001 filler metal for brazing in rolled foil form, used in aerospace applications.

What does SIST EN 3963:2002 specify?

SIST EN 3963:2002 specifies the requirements for Copper CU-BU9001 as a filler metal for brazing supplied as rolled foil for aerospace applications. The document focuses on the material designation, how the product is made and supplied, and the checks used to verify conformity.

The standard is organized around a short introduction, the scope, normative references, and a requirements table that covers composition, form, production route, delivery condition, test methods, inspection, notes on typical use, and product qualification. In practice, that structure tells a buyer or supplier what material is covered, how it should be delivered, and which verification steps apply.

What are the key requirements of SIST EN 3963:2002?

SIST EN 3963:2002 sets the material identity and the main controls that matter for brazing performance and acceptance.

• Clause 3 - Material designation and composition: Copper CU-BU9001 is the designated material, with copper as the main constituent and controlled minor elements. This matters because brazing behavior depends on keeping the alloy chemistry within the specified limits.
• Clause 4.1 and 4.2 - Form and production: The product is supplied as rolled foil and is produced by cold rolling and cleaning. In practice, this means the material is intended as a thin brazing product and the surface condition is part of conformity.
• Clause 4.3 and Clause 6 - Dimensions and delivery condition: The standard identifies the limit dimensions and states the delivery condition as as manufactured or annealed. For users, this affects handling, storage, and whether additional heat treatment is needed before use.
• Clause 5 - Technical specification: The filler metal is tied to EN 3875 for the detailed technical specification. That gives the user the companion document to check for the fuller acceptance framework.
• Clause 44 - External defects: External defects are controlled by reference to EN 3875. This matters because surface faults can affect wetting and joint quality.
• Clause 53 - Thermal analysis: The standard calls for differential thermal analysis to identify the eutectic characteristic. In practice, this is a verification of the alloy’s thermal behavior during brazing.
• Clause 76 - Wettability: Wettability is checked by a fusion test, again by reference to EN 3875. This is important because brazing filler metal must flow and spread properly on the base material.
• Clauses 88, 95 and 96 - Batch uniformity, marking and dimensions: Batch uniformity is verified as material verification, and marking and dimensional inspection are also referenced to EN 3875. These checks support traceability and incoming inspection.
• Clause 100 - Product qualification: Qualification is carried out under EN 2043 and the qualification programme is agreed between manufacturer and purchaser. That means the exact approval route must be set before supply for aerospace use.

What terms does SIST EN 3963:2002 define?

• Copper CU-BU9001: The specific copper alloy designation covered by the standard.
• Filler metal for brazing: The consumable metal placed at a joint so it melts and forms the brazed connection.
• Rolled foil: Thin product supplied in foil form after rolling, suitable for brazing applications.
• Cold rolled: A production route where the foil is reduced in thickness without hot working.
• Annealed: A heat-treated delivery condition used to adjust the material state before use.
• Differential thermal analysis: A thermal test used here to check the eutectic characteristic of the alloy.
• Product qualification: The agreed approval process used to confirm the material is suitable for its intended aerospace use.

Who uses SIST EN 3963:2002?

SIST EN 3963:2002 is used by aerospace material engineers, brazing specialists, suppliers, buyers, and quality teams. They use it to specify the foil, set purchase and acceptance requirements, inspect deliveries, and plan qualification testing.

It is also relevant to laboratories that perform thermal analysis, wettability checks, dimensional inspection, and material verification. For manufacturers, the standard gives the product definition they must meet before supplying aerospace customers.

What changed in SIST EN 3963:2002 from the previous edition?

SIST EN 3963:2002 is identical to EN 3963:2001.

Which standards are used with SIST EN 3963:2002?

• EN 2043 - provides the general requirements for semi-finished product qualification, which is used for product qualification.
• EN 3875 - provides the technical specification for filler metal for brazing and is used for defects, wettability, batch uniformity, marking, and dimensional checks.
• EN 4258 - gives the general organization of standardization and explains how EN material standards relate to their use.
• EN 4500-6 - gives the drafting and presentation rules used for filler metal for brazing material standards.

What does the SIST EN 3963:2002 document contain?

SIST EN 3963:2002 contains a requirements table that links each property or check to a clause and, where relevant, to EN 3875. It covers material designation, composition, melting method, form, production method, delivery condition, thermal analysis, wettability, batch uniformity, marking inspection, and dimensional inspection.

It also includes a note on typical use, stating the material is used for joining ferrous and some nickel base alloys. The final qualification clause sets out that product qualification is agreed between manufacturer and purchaser under EN 2043, which is the part that shapes approval for aerospace supply.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Copper CU-BU9001 - Filler metal for brazing - Rolled foilLuft- und Raumfahrt - Kupfer CU-BU9001 - Hartlot in Form von gewalzter FolieSérie aérospatiale - Cuivre CU-BU9001 - Métal d'apport de brasage - Feuillard laminéAerospace series - Copper CU-BU9001 - Filler metal for brazing - Rolled foil49.025.15Neželezove zlitine na splošnoNon-ferrous alloys in generalICS:Ta slovenski standard je istoveten z:EN 3963:2001SIST EN 3963:2002en01-januar-2002SIST EN 3963:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3963June 2001ICS 49.025.15English versionAerospace series - Copper CU-BU9001 - Filler metal for brazing- Rolled foilSérie aérospatiale - Cuivre CU-BU9001 - Métal d'apport debrasage - Feuillard laminéLuft- und Raumfahrt - Kupfer CU-BU9001 - Hartlot in Formvon gewalzter FolieThis 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 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 3963:2001 ESIST EN 3963:2002

Page 2EN 3963:2001ForewordThis 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, I
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