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Lead-free solder redux

Discussion in 'Electronic Design' started by Rich Grise, Nov 15, 2008.

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  1. Rich Grise

    Rich Grise Guest

    I was just looking for low-melting stuff for the "bend waveguide" thread,
    and stumbled on this:

    Where, if you scroll down below the bismuth, there's indium. They mention
    that the "#35 wire comes in a 105-ft. spool of 1/16" dia. wire. It's
    great for low-temperature soldering."

    And it's got no lead or cadmium! Hooray!

    But there are two drawbacks - it's like $400./pound, and it melts at 260F!
    (easy for on the bench, but I wouldn't use it under the hood of a car!)

  2. IanM

    IanM Guest

    Isn't that the stuff that wets glass and ceramics?
  3. Rich Grise

    Rich Grise Guest

    I donn't know - why don't you investigate that, and give us all a report?

  4. Guest

    don't know about ceramic but I have read somewhere that i can solder
    to glass and is used to make e.g. vakuum tight connections betwen
    metal and glass.

    it's called fields metal

  5. Another drawback is that Indium is very soft: you can squeeze it with
    your fingers. I used Indium wire for gaskets: you just cut 2 pi r plus
    epsilon, overlap the ends, and squeeze tight.
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