aluminum is best
-No rusting
-Lightweight
-Cheaper and more plentiful than steel
-Weaker, but it weighs 1/3 the weight of steel
-Amazing conductive properties, more conductive per weight than copper
-Aluminum is more recyclable than any other material, with no loss of tensile strength when recycled
Yeah, but osmium is denser (the densest element) and it has a nice blue hue to it, however tungsten doesn't expand much when heated, so they all have their neat features
Nah. Tarnishes too easily. While it may have the greatest thermal and electrical conductivity of all the elements, it's too fragile in our modern environment. Maybe pre-industry it would have been much better, but there are other metals that fulfil similar criteria that don't corrode as easily.
Pure silver has the highest thermal conductivity of any metal, although the conductivity of carbon (in the diamond allotrope) and superfluid helium-4 are even higher.[7] Silver also has the lowest contact resistance of any metal.[7]
Platinum
-No rusting
-Lightweight
-Cheaper and more plentiful than steel
-Weaker, but it weighs 1/3 the weight of steel
-Amazing conductive properties, more conductive per weight than copper
-Aluminum is more recyclable than any other material, with no loss of tensile strength when recycled
In all seriousness, for practical purposes gold wins.
Ag: 15.87 nΩ·m
Au: 22.14 nΩ·m