Yes, silver(Ag)has a higher conductance value. My EE father worked on electrical ship systems in WWII. Copper was in such short supply at one point that they used silver for buss bars on a french ship they were building. Also, during the manhatten project they were short on copper so they requested silver from the treasury dept, they laughed at them. After a call to the White House, treasury called back an hour later : how much do you need, and where do you want it?
I worked with a guy back in the 60’s who told me they took all the silver the US had in Fort Knox and various mints and took it to Alabama. He worked on a huge magnetic seperator for producing Uranium isotopes. It worked but then gas diffusion worked better, so they took all the silver and remelted it. Put it back where it came from. That was his entire war experience. Was sworn to tell no one but by the 60’s no one cared anymore.
What they needed it for was a collection of calutrons, to be built at Oak Ridge.
The calutron was the idea of Ernest Lawrence (Lawrence Livermore and Berkeley laboratories are named after him.)
Around 1930, Lawrence had invented the cyclotron; the calutron, and an adaptation of his machine, was capable of separating U235 from U238, one atom at a time! Essentially, it was a mass spectrometer.
The machines needed magnets, really BIG magnets, and the magnets had to be as powerful and efficient as possible. Thus, the silver from Fort Knox.
Ridiculously expensive to build and to operate, the calutron
was one of several approaches to uranium separation, which were tried all at once.
After the war, they sent the silver back to Fort Knox.