Good news: metals don't actually have smells!
Bad news: the smells metals seem to make are your own body odors! Also this same thing is the source behind weird water tastes!
This makes a lot of sense. From personal experience, I've noticed blocks of metal and pipes don't have smells when I start but after a few minutes of working and handling, my hands reek with a smell that I thought was copper, for example. My didn't-think-about-it-for-more-than-a-minute hypothesis had been that we could only smell fine particles the kind that rubbed off after handing as opposed to parts of larger metallic objects.
Also from personal experience, working with copper makes the strongest smell, aluminum has a bit of a smell, and stainless steel often doesn't smell at all.