Hi!
Piano wire is easiest soldered together using a simple soldering iron.
For more then 40 years I have been using a 50W Weller soldering iron and it is capable of soldering even 5mm piano wire with ease. The best soldering tin available is "stay-Brite". Stay-Brite is a silver/tin solder and has a flux that makes soldering very easy as you don't have to clean the surface you are about to solder,othervise a thorough cleaning with sandpapper is necessary. You should never heat pianowire red hot as this removes the springiness. This means using Tig or Mag welding as well as old style acetyle torch as not suitable metods to join pianowire.
Last edited by jaka; 11-22-2017 at 11:18 AM.