Gas Atomized Spherical BNi?2Powder Nickel Braze
BNi-2 nickel brazing powder: low melting range, superiorwettability, high-temperature strength, and reliableoxidation/corrosion resistance for stainless steel, superalloys,and diamond-tool joining.
What Makes BNi-2 Powder Special
BNi-2? is a nickel-chromium-silicon-boron-iron brazing alloy(Ni–7Cr–4.5Si–3B–3Fe, balance Ni). It is one of the most widelyused high-temperature brazing fillers in the world, compliant withAWS A5.8 BNi-2, AMS 4777, ISO 17672 Ni620, and UNS N99620.
Application Notes: Vacuum or protective atmosphere brazing ismandatory. Wide gaps shall be oided to prevent brittle central-linephases. Diffusion heat treatment is recommended for criticalaerospace parts to optimize joint toughness.
Short catalog version (for product page, optional)
BNi-2 is a nickel-based vacuum brazing alloy (AWS A5.8 BNi-2,AMS4777) supplied in powder, amorphous foil and paste. With meltingrange 970–1000°C, it features excellent wettability,high-temperature strength and oxidation resistance. It reliablybrazes stainless steel, Ni/Co superalloys for aerospace engineparts, heat exchangers, honeycomb structures, gas turbinecomponents and superhard cutting tools under vacuum or inertatmosphere.Rite Material
5. Cool down in furnace to below 300 °C before unloading.
4. Post-brazing & Safety Notes
- Critical aerospace assemblies may require post-braze diffusionheat treatment to improve joint ductility.
- BNi?2 contains boron. Boron diffusion into thin substrates maycause embrittlement; strictly control temperature & holding timefor thin-walled parts.
- Storage: Keep powder sealed, dry and away from moisture. Preparedpaste should be refrigerated and used promptly.
Watch out:? Higher brazing temperature than BNi-2; no chromium →limited oxidation resistance at elevated service temperatures
How to Decide — Quick Decision Tree
Step 1:? Does the part need oxidation/corrosion resistance at hightemperature?
Yes → BNi-2
No → Go to Step 2
Step 2:? Is the joint clearance very tight (≤0.05 mm) or theoverlap very long?
Yes → BNi-3
No → Go to Step 3
Step 3:? Do you need more ductility or he wider gaps (0.05–0.15mm)?
Yes → BNi-4
Still unsure → BNi-2? (it covers most cases)
One-Line SummaryRite Material
Structural Component BNi?2 Powder for Aerospace