The melting temperature of lead is 327°C and that of tin is 232°C.?
The melting temperature of lead is 327°C and that of tin is 232°C. For many years a mixture of 60% tin and 40% lead was used by electricians to join metals together, especially in electrical circuits. Why was this material used in this way?
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Such a mixture of tin and lead is called "solder" and melts over a range of 183C to 190C. The alloy does not have a single melting point. This occurs in much the same way that dissolving a solute in a liquid solvent lowers the melting point of the mixture (like salt in water). The lead "dissolved" in tin lowers the melting point of of the tin-lead mixture.
Them.p. of mixture is lower than either and mixture is known as solder