Bronze is a kind of copper-based alloy with main alloying element of Tin. The hardness and strength of bronze increase with an increase in Tin content. The ductility is also reduced with the increase in tin above 5%. When aluminium is also added (4% to 11%), the resulting alloy is termed aluminium bronze, which has a considerably higher corrosion resistance. Bronzes are comparatively costly compared to brasses due to the presence of tin which is an expensive metal.
