Examples of metals: iron, nickel, uranium, thorium, sodium, niobium, plutonium, etc.
There are A LOT! Heavy, thrash, black, death, groove, progressive, stoner, doom, goth, sludge, metalcore, deathcore, crossover, the list goes on and on.
fire fighting and groung type moves so id say infernape with close combat a fire move and earthquake would easily beat any steel type
No, NOT ALL metal does stick to all other metal.
Aluminum and Titanium are popular for their strength to weight ratios, but many metals are used.