Overview
EN ISO 17672:2024 - Brazing - Filler metals (adopted by CEN) defines the compositional ranges and classification of brazing filler metals used in industrial brazing. The standard groups filler metals into seven classes by composition, specifies requirements for composition verification and delivery, and covers filler metals as the active component of composite products (e.g., flux‑coated rods, pastes, tapes). Melting temperatures are provided for guidance only and technical delivery conditions for products containing fluxes or binders are included.
Key topics and technical requirements
- Composition and classification: Tables specify compositional ranges for each filler‑metal type. Annex A provides codification and identifies major element(s).
- Product scope: Applies to discrete filler metals and the filler portion of composite products; excludes many specialty precious‑metal alloys used in jewellery, aerospace and dental applications (covered by other standards).
- Chemical analysis and conformity: Routine and non‑routine chemical analysis rules; rounding and reporting follow ISO 80000‑1 conventions. A spatter test for oxide content (useful for vacuum brazing) was added in this edition.
- Special vacuum requirements: For selected alloys (examples: Ag 272, Pd 287, Pd 387, Au 295, Au 375), lower impurity limits may be required for vacuum brazing/service. Such grades are identified by a “V” suffix plus a grade digit (1 = most demanding, 2 = less demanding).
- Technical delivery conditions: Requirements for types of product (foils, rods, wires), dimensions, condition, marking, packaging and product certificates are specified.
- Health & safety: Precautions and guidance for safe handling and use of brazing filler metals are included.
Practical applications and who uses this standard
EN ISO 17672:2024 is essential for:
- Brazing filler‑metal manufacturers - to define product compositions, grades and conformity criteria.
- Material procurement and quality managers - when specifying filler metals and receiving certificates.
- Fabricators and welding/brazing engineers - for selecting appropriate brazing alloys (including vacuum brazing grades) and understanding delivery conditions.
- Testing laboratories - performing chemical analyses and spatter/oxide tests.
- Regulatory and compliance teams - for documentation, marking and traceability of brazing materials.
This standard helps ensure consistent alloy chemistry, controlled impurity levels for vacuum service, and clear product documentation - supporting reliable joints across automotive, industrial, HVAC, toolmaking and general manufacturing brazing applications.
Related standards
- ISO 80000‑1 (quantities and units) - referenced for rounding/reporting rules.
- Other ISO/CEN standards cover precious‑metal brazing for jewellery, aerospace and dental applications; consult sector‑specific standards when applicable.
Keywords: EN ISO 17672:2024, brazing filler metals, brazing alloys, composition ranges, vacuum brazing, chemical analysis, technical delivery conditions, brazing standard.