Bronze is generally harder than copper. This is due to the fact that bronze is an alloy composed of copper and tin, which increases its hardness compared to pure copper. The addition of tin to copper creates a harder and more durable material. According to the Brinell hardness scale, which measures the hardness of materials, the hardness of copper ranges from 55 to 110, while the hardness of bronze can range from 80 to 450, depending on the specific composition of the bronze alloy. This significant difference in hardness makes bronze a preferred material for applications requiring greater strength and durability, such as in the construction of tools, machinery, and sculptures.