Mild steel doesn't work harden like copper or aluminium, although I agree it's mechanical characteristics do change a bit (usually for the worse, it seems to me). There should still be no problem soldering it though providing you use the right materials.
Pedersen bicycle frames were built using nothing but soft solder to join the steel tubes
Materials like carbon steels can still be soldered nicely, but the temperatures required may draw the temper. One solution to that is to stick the end you don't want to heat into a potato as a heat sink.
I have successfully soft soldered HSS drill bits into holders when I needed an overlength drill for spotting through an inaccessible hole, for example.
Enclosed a few images of the conduit. As you can see there is not a lot of space and I need to move or remove it so that area can be used as a cupboard. I hope the pics clarify what I have been describing
if you aren't using the conduit as earth and it is earthed from the other ends then I don't see any reason why you can't just cut it off near floor level, cover the ends with something to stop them damaging the cores and use some kind of plastic adaptable box to cover up the place where the cable briefly comes out of one conduit and enters the other.
Gentleman and possibly ladies, do you have any further ideas regarding this conduit problem as I am still not certain as to what to do. I thought conduit could not be broken even if a seperate earth is run and both ends of conduit is earthed?
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