You cannot solder Steel BUT you can braze steel and copper and you can thread steel and then use a copper x female adapter Or finf a steel fitting and use a C x M adapter
NO, BUT you can Braze copper to steel
With fllux, solder and a torch. clean both surfaces with steel wool or sand paper, put a thin film of flux on each piece on the entire area that will be joined. Heat on one side and put the solder on the opposite side. When the copper get hot enough to melt the solder, the flame from the torch will draw the solder to it. That way you know there is solder in the whole joint.
It is an alloy of copper.
Copper colored solder can be found at http://www.beadmeus.com/coppercolorsolder.aspx the flux is included in the soldering rod.
You should use solder, not brazing. Brazing is used to join iron or steel products together.
Sandcloth the end being soldered. Squish the end with pliers so it is tight. Put flux on the end and solder. Easier to buy a copper cap and solder that on!
you solder or braze it
Yes
You can solder stainless steel parts together, but you cannot use it as solder. You would need to use silver bearing solder. Also you need a torch, you will not be able to use a simple solder pen as it doesn't produce enough heat.
Solder can be used on any grade of brass or copper.
It melts solder. Solder was originally a mix of lead and tin that was used to join copper to copper (pipes and wiring) It is in the shape of a pistol, but does not shoot anything.
What to use to solder a shut off valve
Mild steel, not copper.