EN 3928:1998

Overview

EN 3928:1998 is a European standard established by CEN that specifies the requirements for the aerospace-grade nickel base alloy NI-B40001 (NiSi5B3). This alloy is used specifically as a filler metal for brazing applications in tape form. The standard ensures that the filler metal meets stringent quality and performance criteria necessary for aerospace manufacturing and maintenance, where reliability and material integrity are critical.

Key Topics

• Nickel Base Alloy NI-B40001 (NiSi5B3)
  This special nickel-based alloy contains silicon and boron, enhancing its brazing properties and mechanical strength. The alloy composition is optimized for joining high-temperature and corrosion-resistant aerospace materials.

• Filler Metal for Brazing
  The standard covers the requirements for filler metal used in brazing processes, a method of joining metal parts through melting and flowing a filler metal without melting the base materials. The tape form facilitates uniform and controlled application.

• Tape Form
  The filler metal is provided as a tape, which ensures ease of handling, precise placement, and consistent quality during the brazing process. This form factor is especially useful in aerospace manufacturing where precision is paramount.

• Quality and Performance Requirements
  EN 3928:1998 defines chemical composition, mechanical properties, physical characteristics, and tolerances to guarantee repeatable performance during aerospace component assembly.

Applications

• Aerospace Manufacturing
  EN 3928:1998 compliant filler metal tape is used extensively in the fabrication of aerospace components, including jet engines, airframes, and turbine parts. Brazing with this nickel alloy tape ensures strong, heat-resistant joints critical for high-performance aerospace equipment.

• Repair and Maintenance
  Aerospace maintenance teams utilize this brazing tape for component repair, enabling restoration of parts to meet strict safety and operational standards without requiring full replacement.

• High-Temperature Environments
  Suitable for components exposed to extreme temperatures and corrosive atmospheres, the nickel base alloy NI-B40001 filler metal provides reliable joints that withstand harsh aerospace operating conditions.

Related Standards

• EN 13445 - Metallic Materials for Aerospace Applications
  Supplements guidelines on material properties and testing relevant to aerospace metals.

• EN 12797 - Brazing Processes
  Provides broader requirements for brazing methods used in aerospace manufacturing.

• EN ISO 17672 - Brazing Consumables
  International standard covering brazing filler materials, complementing specific alloy requirements in EN 3928:1998.

Keywords: EN 3928:1998, nickel base alloy, NI-B40001, NiSi5B3, brazing filler metal, brazing tape, aerospace brazing, aerospace materials, high-temperature alloys, aerospace manufacturing, CEN standard.