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Thread: Re tempering

  1. #1
    Join Date
    Feb 2016
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    East Anglian
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    113

    Default Re tempering

    Having soldered a “broach pin” with rotary safety onto a piece of silver I now find quite obviously the pin is annealed and totally bendy. How can I retemper this please?


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  2. #2
    Join Date
    Jul 2009
    Location
    Romsey
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    What's the pin made of? I doubt you'll be able to harden it with heat (critical temperature of steel is ~724C, but varies according the alloy); you might be able to work harden it carefully by twisting it.

  3. #3
    Join Date
    Dec 2009
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    Central London
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    Yes, as Peter suggests, grasp the pin near the joint with narrow pliers and then with second pair of pliers, give the pin a quarter turn every four mm or so about its long axis. Done carefully, the rigidity will return, with not too much marking of the pin. Ear posts have to be done in the same way. Dennis.

  4. #4
    Join Date
    Feb 2016
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    East Anglian
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    Everything is silver, pin included!
    Thanks for the “twisting”advice.


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  5. #5
    Join Date
    Sep 2014
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    2,051

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    Surgical steel works much better for pins, I only use that now as recommended by Dennis a few years ago, it is far stronger.

  6. #6
    Join Date
    Feb 2016
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    East Anglian
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    The broach pin ensemble is original so “had” to be reused. I will attempt to do the twist....that’s showing my age!


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  7. #7
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    Don't hurt your back. Dennis.

  8. #8
    Join Date
    Feb 2016
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    Quote Originally Posted by Dennis View Post
    Don't hurt your back. Dennis.
    Ha ha. It’s already got Titanium 2 rods and 4 screws holding it together!


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  9. #9
    Join Date
    Feb 2016
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    East Anglian
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    Yes the twisting has worked well. Thanks to all.


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  10. #10
    Join Date
    Dec 2009
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    Central London
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    Thanks for coming back to us. Regards, Dennis.

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