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Typical soldering tips have a copper core, plated with iron. The copper allows heat transfer, and the iron plating provides durability. Soldering is a joining process involving a filler metal that is ...

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In the 1800s and early 1900s soldering irons were still heated by flame. The large copper tips on the irons were slow to heat and would at best store heat for only a few minutes. It was not uncommon ...