In general, alloys are more expensive than metals. This is primarily due to the additional processing and manufacturing steps required to create alloys. Alloys are made by combining two or more metals, which can enhance their properties, such as strength, durability, and corrosion resistance. The process of creating an alloy often involves melting the metals, mixing them, and then casting or shaping them into the desired form. This additional processing adds to the cost of the alloy compared to the cost of the individual metals used to create it.

For example, stainless steel, an alloy of iron, chromium, and nickel, is more expensive than pure iron or even pure nickel. The addition of chromium and nickel improves the corrosion resistance and strength of the steel, making it suitable for applications where these properties are critical. According to a report by the American Iron and Steel Institute, the cost of stainless steel can be up to 50% higher than the cost of pure iron, depending on the specific composition and grade of the steel.

Additionally, the rarity of certain metals can also contribute to the higher cost of alloys. For instance, tungsten, a rare metal, is often used in alloys to increase their hardness and durability. The scarcity of tungsten makes it more expensive, and thus, alloys containing tungsten are also more costly.

Furthermore, the demand for certain alloys can drive up their prices. Alloys with unique properties, such as those used in aerospace or medical applications, are often in high demand and can be quite expensive. The specialized manufacturing processes required for these applications also contribute to the higher cost.

In conclusion, alloys are generally more expensive than metals due to the additional processing, the inclusion of rare or valuable metals, and the demand for specific properties. The cost of an alloy can vary widely depending on its composition, the manufacturing process, and the intended application.