What Makes 13Cu69NiSiB Alloy Powder Suitable for Precision Brazing and Glass Sealing

13Cu69NiSiB alloy powder is a high-performance, nickel-based brazing filler material known for its excellent flowability, corrosion resistance, and hermetic sealing capability. Its precise composition—13% copper, 69% nickel, with silicon and boron as melting point depressants—makes it ideal for electronics, aerospace, and vacuum systems.

Precision Melting Behavior for Reliable Brazing

This alloy offers a low and consistent melting range (typically 970–1000°C), allowing:

• Excellent wettability on stainless steels, superalloys, and ceramics

• Minimal distortion or grain growth during joining

• High-strength, leak-tight joints for structural or hermetic applications

Controlled Composition for Glass-to-Metal Sealing

13Cu69NiSiB alloy powder’s balanced chemistry is specifically optimized for:

• Glass-to-metal sealing in electronic packages

• Ceramic-metal joining under vacuum or protective atmospheres

• Dimensional stability with minimal thermal expansion mismatch

Ideal for Additive and Powder Metallurgy Applications

Produced via gas atomization, the powder has:

• Spherical morphology and narrow size distribution (15–45 μm)

• High purity and low oxygen content

• Uniform particle structure for consistent layer deposition

Key Applications

• Vacuum electronics and hermetic device enclosures

• Heat exchangers and precision sensors

• Aerospace engine components requiring reliable brazing

• Automotive catalytic converters and temperature probes

Benefits Summary

• Tight melting control with strong metallurgical bonding

• High corrosion and oxidation resistance at elevated temperatures

• Compatibility with various thermal processing methods (torch, induction, furnace)

• Efficient flow and wetting for narrow joint tolerances

Frequently Asked Questions (FAQ)

Q1: What is the typical melting range of 13Cu69NiSiB?
A1: Solidus at approximately 970°C, liquidus at 1000°C.

Q2: Is this alloy suitable for vacuum brazing?
A2: Yes, it performs exceptionally well in vacuum and reducing atmospheres due to its low vapor pressure and clean flow.

Q3: Can it be used for glass sealing applications?
A3: Absolutely. The controlled thermal expansion and chemistry ensure tight, stable bonds with various glass types.

Conclusion

13Cu69NiSiB alloy powder is engineered for high-precision brazing and sealing, offering a unique balance of melting control, mechanical strength, and chemical compatibility. It supports advanced fabrication methods across multiple high-tech sectors.

Contact HUAXIAO TECH for detailed specifications and custom brazing solutions.