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  2. Tin - Wikipedia

    en.wikipedia.org/wiki/Tin

    Tin pest can occur in lead-free solders, leading to loss of the soldered joint. Replacement alloys are being found, but the problems of joint integrity remain. [ 88 ] A common lead-free alloy is 99% tin, 0.7% copper, and 0.3% silver, with melting temperature of 217 °C (422.6 °F).

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