9. What two metals were combined to make bronze? What effect of bronze on armaments?
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The introduction of bronze was a huge improvement in tool and weapon manufacture. Unlike iron which was a difficult material to work with, bronze technologies were similar to the techniques improved during the copper age: It could be cast, hammered cold, and annealing improved its toughness. Bronze is an alloy of copper and of about 4% tin. It is harder than pure copper, melts at a lower temperature and is easier to cast. But when the amount of tin is 5% or higher the alloy becomes brittle when hammered and has to be annealed frequently.
