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Soldering Power cables.

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Proper solder should not melt unless something is very wrong:

From the following diagram, it can be seen that most tin/lead solders have a plastic range, i.e. on heating they are pasty between the solid and liquid states.

  • The solders are solid at 183°C (361°F). According to the alloy composition they have different plastic ranges.
  • 60/40 tin/lead alloy for example becomes liquid at 188°C (370°F) and therefore has a plastic range of 5°C (9°F),
  • 40/60 tin/lead alloy for example becomes liquid at 244°C ( 453°F) has a plastic range of 51°C (92°F).
  • HMP alloy alloy for example becomes liquid at 300°C  ( 572F) (USUALLY HAS SILVER ON IT) can therefore be relied upon in service up to about 255°C compared with about 145°C for the common tin/lead alloys. HMP alloy is consequently particularly suitable for soldering electric motors, car radiators, high temperature lamps and other products which are likely to meet relatively high temperatures during their working life.

FYI: plastic means is becomes deform-able.



  • Using low lead will cause failure.  I recommend you use High Melting Point(HMP) Temperature solder with silver on it.
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