EN 3919:1998

Overview

EN 3919:1998 (adopted nationally as SIST EN 3919:2001) is a CEN aerospace series standard that sets out the requirements for the nickel‑base alloy NI‑B41202 (NiCr14Si5B3) when supplied as an amorphous foil filler metal for brazing. The standard targets brazing materials used in aerospace components where reliable joint performance, repeatable processing and traceability are essential.

Key Topics

EN 3919 defines the requirements and acceptance criteria related to the filler metal in amorphous‑foil form. Key technical topics typically addressed include:

• Material identification - designation NI‑B41202 / NiCr14Si5B3 and intended form (amorphous foil).
• Manufacturing and form - requirements for production of amorphous foil suitable for brazing applications.
• Physical and metallurgical characteristics - properties relevant to brazing performance (e.g., amorphous structure and behaviour during heating).
• Chemical and compositional control - conformity of alloy chemistry to the NI‑B41202 designation.
• Sampling and testing - methods for verification and acceptance of supplied material.
• Packaging, marking and documentation - traceability, batch identification and accompanying certification required for aerospace use.
• Quality and conformity - criteria for acceptance and non‑conformance handling in supply chains.

(Note: this summary lists the typical requirement categories covered by EN 3919; consult the full standard for precise test methods, limits and procedural details.)

Applications

EN 3919 applies where high‑reliability brazed joints are needed in aerospace structures and systems. Practical applications include:

• Joining nickel‑base and high‑temperature alloys in engines, hot sections and thermal management components.
• Repair and assembly processes requiring foil‑form filler metals for controlled brazing operations.
• Situations demanding consistent brazing behaviour, tight traceability and aerospace‑grade material certification.

Using an amorphous foil filler metal can improve handling, uniformity of distribution, and repeatable melting/flow characteristics in critical brazed assemblies.

Who Uses This Standard

• Aerospace OEMs and Tier suppliers specifying brazing consumables.
• Materials engineers and brazing process specialists developing brazing procedures.
• Quality assurance and procurement teams assessing supplier conformity.
• Filler‑metal manufacturers and distributors providing aerospace‑grade products.
• Certification and regulatory bodies evaluating material compliance.

Related Standards

• EN 3919:1998 is part of the CEN aerospace series and is nationally adopted (e.g., SIST EN 3919:2001).
• Users will often reference EN 3919 alongside other aerospace material, brazing procedure and quality standards (consult applicable EN/ISO documents for brazing practice and metallurgical testing).

Keywords: EN 3919, NI‑B41202, NiCr14Si5B3, amorphous foil, filler metal for brazing, aerospace standard, CEN, SIST EN 3919.