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I want to know if it's possible soldering pcb using nichrome wire instead of lead.

Specs say Nichrome wire melting point is around 1440 centigrade. Which is achievable with a tiny flame.

  • Is there a PCB thermally resistant to such temperature.
  • Maybe a solder paste based on nichrome alloy with a melting point below the alloy itself
  • Is there another very low conductivity alloy which could have a melting point way below 1440C and mantain resistivity properties of the nihcrome?
  • What is called the nickel alloy used for mobo soldering which has a elevated melting point around 485C - 565C. Can you describe some of its properties?
  • What would be such devices highly unnafected by such temperatures eventually. Is there a name or catalog of this?

Thanks in advance

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  • \$\begingroup\$ This feels like an XY problem. What are you making? What's the ultimate purpose of the complete device (or subassembly)? \$\endgroup\$ – Nick Alexeev Nov 18 '18 at 22:08
  • \$\begingroup\$ In general the study was planned as a high conductivity interface soldering betwen two pcb sheets. with a very few contact points and a very high frequency in the transmission without much thermal distortion. let's say it was a 1 gigahertz square signal for an instance which has to be preserved from one pcb to the next through a very cheap low impedance cable and a very expensive soldering paste. is this correct. \$\endgroup\$ – sphericsf Nov 18 '18 at 22:11
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    \$\begingroup\$ By definition, joining two metals (pcb copper and component copper) by using a filler metal that melts at less than 450C is soldering. Doing the same thing with a filler that melts at 1440C is called brazing. But the copper melts at 1085C. That's welding. Welding dissimilar metals is difficult, and avoided where possible by using mechanical connections. \$\endgroup\$ – david Nov 18 '18 at 22:24
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You crimp a small copper tube over it. The copper will just partialy heat due to heat transfer from wire, but if the tube is long enough and has a good crimp, then it woon't heat at all.

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