Soldering can do together and cast iron welding
Iron welding is very difficult, even if successful strength is not high, some metal and solder are difficult to weld, these are in use even if there is no welding spot welding, spot welding and soldering iron. 63% other tin lead, lead is a heavy metal, toxic, like iron, iron spoon, do not weld health important, if other things don't matter.
Yes, but the intensity is not high. The flux needs a Zinc Oxide solution. The soldering iron needs more than 300 watts, welding before the iron rasion clean, heated iron in the above, and then apply the flux in the tin coated, after connecting to connect components.
