BNi?2 Brazing Powder for PowerGeneration Equipment
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.
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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.
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. RiteMaterial
Good corrosion resistance? in many chemical and high-temperatureenvironments
After diffusion brazing, joint remelt temperature can rise wellabove the original liquidus
Recommended joint clearance: 0.03–0.10 mm (0.001–0.004 in)?
4. Powder Characteristics (Gas-Atomized Grade)
Spherical or near-spherical particles
Low oxygen content
Uniform particle-size distribution
Good flowability and tap density → suitable for automatic pastedispensing, screen printing, and powder deposition
Clean parts, dry powder, correct clearance, and a controlledvacuum/protective atmosphere decide whether the joint is excellentor rejected.
Rite Material ? — Precision Powder, Reliable Bonds.
*Tips provided by Rite Material*
1. BNi?2 powder must be brazed under vacuum or high-purity inertatmosphere. Air brazing will cause severe oxidation and failedjoints.
2. Strictly control the joint clearance within 0.03–0.10 mm. Toolarge gaps easily generate brittle boride phases and reduce jointstrength.Rite Material
BNi?2 Nickel Powder Low Porosity Brazed Seams