Hangbo Alloy Group
Shanghai · Est. 2012
How to braze nickel alloys: nickel-based filler metals, joint gap and fit-up, atmosphere and flux, plus post-braze diffusion and surface finishing on parts.
Brazing joins nickel alloy parts with a molten filler metal that wets and flows into a narrow joint by capillary action, without melting the base metal. For the high-nickel, chromium- and cobalt-bearing alloys used in heat exchangers, turbine hardware, and instrument assemblies, brazing gives a route to leak-tight, full-strength joints that fusion welding cannot always reach — especially for thin sections, dissimilar metals, and complex multipart assemblies. Hangbo supplies the mill forms and fabricated details that get brazed, built to filler-metal and joint-cleanliness specs that hold up in service.
Yes, with a filler that tolerates both — nickel-based fillers bridge nickel alloys and stainless or carbon steel, though you must watch for galvanic and thermal-expansion mismatch. See galvanic corrosion for the downstream risk.
Filler flow typically starts around 950–1050 °C for BNi systems; vacuum brazing of Hastelloy and Inconel parts usually runs 1065–1175 °C. The base metal melts well above that, so it stays solid.
For thin or delicate assemblies, brazing avoids the distortion and burn-through that fusion welding causes, and gives uniform joint strength across complex geometries.
Dye penetrant and radiography find lack-of-fill and voids; metallography confirms fillet and penetration on first-article parts. Ultrasonic testing is more for base material than the joint itself.
As a dedicated nickel alloy manufacturer serving aerospace, chemical processing, power generation sectors, Hangbo Alloy Group supplies the grades discussed here across all standard product forms with full ASTM/ASME documentation and EN 10204 3.1 certification. Our material is specified for applications where corrosion resistance, high-temperature strength, and traceable quality are non-negotiable. See our production & testing facilities for more on how every heat is verified.