SIST EN 3935:2001

Aerospace series - Nickel base alloy NI-B21001 (NiCr15B4) - Filler metal for brazing - Borided foil

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

Luft- und Raumfahrt - Nickelbasislegierung NI-B21001 (NiCr15B4) - Hartlot in Form von borierte Folie

Série aérospatiale - Alliage base nickel NI-B21001 (NiCr15B4) - Métal d'apport de brasage - Feuillard boruré

Aerospace series - Nickel base alloy NI-B21001 (NiCr15B4) - Filler metal for brazing - Borided foil

General Information

• Status: Published
• Publication Date: 31-May-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-Jun-2001
• Due Date: 01-Jun-2001
• Completion Date: 01-Jun-2001
• Ref Project: EN 3935:2001 - Aerospace series - Nickel base alloy NI-B21001 (NiCr15B4) - Filler metal for brazing - Borided foil

Overview

EN 3935:2001 is a CEN aerospace series standard that defines requirements for the nickel base alloy NI‑B21001 (NiCr15B4) used as a filler metal for brazing in the form of borided foil. The standard applies to brazing consumables intended for aerospace applications and sets out the minimum expectations for material quality, delivery and traceability. Keywords: EN 3935:2001, NI‑B21001, NiCr15B4, borided foil, filler metal for brazing, aerospace brazing.

Key topics and requirements

While the full text contains precise clauses, EN 3935:2001 typically covers the following technical topics and requirements:

• Material identification – designation of the filler metal as NI‑B21001 (NiCr15B4) and description of the borided foil form.
• Chemical and metallurgical requirements – provisions for chemical composition, microstructure considerations and any surface boriding treatment required for brazing performance.
• Physical and dimensional requirements – foil thickness, width, tolerances and flatness suitable for consistent brazed joints.
• Manufacturing and treatment – acceptable production processes and the boriding surface treatment that improves wetting or corrosion resistance during brazing.
• Testing and inspection – sampling, chemical analysis and functional tests to verify conformity with the standard.
• Marking, packaging and documentation – traceability, batch identification, certificates of conformity and packaging to protect the borided foil in transit.
• Quality assurance – requirements for supplier controls and acceptance criteria relevant to aerospace use.

(Note: specific numerical values, limits or test procedures are detailed in the official standard document.)

Applications

EN 3935:2001 is intended for aerospace brazing operations where a nickel‑base filler is required. Typical application areas include:

• Joining nickel‑base superalloys and dissimilar materials in gas turbine components
• Fabrication and repair of combustion chambers, heat exchangers, valves and high‑temperature assemblies
• Precision brazing operations requiring thin, controlled‑geometry filler metal in foil form
• Situations where a borided surface on the filler improves brazing behavior or service performance

Who uses this standard

• Aerospace manufacturers and OEMs specifying brazing consumables
• Supplier and procurement teams for aerospace materials
• Metallurgists and joining engineers designing brazed assemblies
• Quality and conformity assessors responsible for material certification
• Repair stations performing maintenance on high‑temperature components

Related standards

EN 3935:2001 is part of the aerospace and brazing standard family. Users should consult other EN and ISO standards covering brazing filler metals, brazing procedures, and nickel‑base alloys for complementary guidance and procedural requirements.

For definitive technical limits, test methods and certification language, obtain the official EN 3935:2001 document from the national standards body.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2001
Aerospace series - Nickel base alloy NI-B21001 (NiCr15B4) - Filler metal for brazing
- Borided foil
Aerospace series - Nickel base alloy NI-B21001 (NiCr15B4) - Filler metal for brazing -
Borided foil
Luft- und Raumfahrt - Nickelbasislegierung NI-B21001 (NiCr15B4) - Hartlot in Form von
borierte Folie
Série aérospatiale - Alliage base nickel NI-B21001 (NiCr15B4) - Métal d'apport de
brasage - Feuillard boruré
Ta slovenski standard je istoveten z: EN 3935:2001
ICS:
49.025.15 Neželezove zlitine na Non-ferrous alloys in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Ra
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