What are the requirements of the electric iron for the welding of the two components, and how is the material available?
Electric soldering iron with lead tin alloy with low melting point, melting as a "third party" to fill the gap between the workpiece to be welded, through molecular force connection of the welding workpieces. Here, the low melting point of Pb Sn alloy is called "solder", because the work piece does not melt, so the welding process called brazing, welding and welding workpiece melting, for example. Any tin material can be welded by electric iron.
Can usually be welding of copper, iron, steel, tin, gold, silver and other more common, but to consider the size of metal welding, not much can welding, metal iron bigger to welding, because the electric iron temperature has a range of temperature, not up to cannot be welded.