I'm searching for brazing alloys wich MAY NOT contain the following elements:
Zn/Cd/Pb/P/S.. 

we use now Incusil en cusiltin...
Si is not our favorit, accordig the literature:

the joint is highly vaccum thight e-10Pa
temperature between 400-650 Celcius, and as a preform 50 micron (0,02")

what are the possibilties?

milan.van.bree@panalytical.com