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Vacuum brazing: Good to know - vacuum brazing in mechanical and apparatus engineering

Vacuum brazing in mechanical and apparatus engineering: gap-free, bright and corrosion resistant

The shown hot water components are a typical example for a material efficient modular design. Components are assembled out of simple, well available pre-fabricates, which then are brazed to each other. Due to the specific requirements of food processing industry zero gaps and excellent corrosion resistance are mandatory. That’s why the components are made of austenitic CrNi-steel and brazed with a high Cr-containing nickel based brazing alloy. With an appropriate size of the furnace several thousand components can be brazed in one process.  Because of the vacuum atmosphere the components are absolutely bright and shiny, without gaps and no further post processing is necessary.

These advantages will also be used for a component, which has the function to distribute a central injected fluid to 100 outlets. The service conditions for analytic devices require the application of a titanium alloy. Again the requirements to the joint are no gaps and a corrosion resistance comparable with the parent material. The brazing process has been accomplished with a brazing alloy based on TiZrCuNi, which enables a brazing temperature < 950°C, fairly below the critical a-b-transus temperature. Even in this case no post processing is necessary after the vacuum brazing.

Please note: use vacuum brazing when gap-free, bright and shiny components are needed and post processing has to be avoided.

Please contact us for professional information.


Listemann Technology AG
Ober Au 38
LI-9487 Bendern
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Listemann AG
Sulzer Allee 25 
CH-8404 Winterthur
+41 52 245 18 50

Listemann Polska Sp.z o.o.
ul. BiskupiƄska 23
PL- 30732 Kraków
+48 12 6534 230
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