Weapons are made from blends of different metals ("alloys"). As a result of this, different metals crop up in weapons all the time. Nickel was especially common in meteoric iron, bronze is an alloy of copper and tin (roughly a 9:1 ratio), and smaller quantities of other metals (aluminum, manganese, zinc, arsenic) show up in one alloy or another throughout history.

That said, and aside from copper weaponry that predates the copper and tin alloy in the relatively short Copper Age, you've listed all the major metal types used in weaponry... unless you want to talk about bullets, which somewhat expands the topic.