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Problem 8 - Entrance Test

Why are alloys preferred over pure metals for many applications?

A. They are always cheaper to produce.B. They are always lighter than pure metals.C. They generally have improved properties like increased hardness, strength, or corrosion resistance.D. They have lower melting points compared to their constituent metals.

Correct: C

Alloys are homogenous mixtures of two or more metals, or a metal and a non-metal. They are made to enhance the desirable properties of metals. For instance, alloys can be harder, stronger, more resistant to corrosion, or have specific magnetic or electrical properties compared to their pure metallic components. While melting points can vary, the primary reason for alloying is property enhancement.