What are alloys?

An alloy is a substance with metallic properties formed by the fusion of two or more metals or metals with non metals. It is usually formed by melting, mixing, cooling, and solidifying. The hardness of alloys is generally higher than that of their constituent metals, while their melting point is usually lower than that of the constituent metals.
Definition
An alloy is a substance formed by the fusion synthesis of two or more metal elements, or metal and non-metal elements, containing at least one metal element.
Physical properties
Hardness: Most alloys have a higher hardness than their constituent metals, thus possessing better wear resistance and deformation resistance.
Melting point: The melting point of an alloy is usually lower than its constituent metals, which makes the alloy easier to melt and form during processing.
Chemical properties
The chemical properties of alloys are usually a combination of the constituent metals and non metals. For example, magnesium aluminum alloy only partially dissolves aluminum in sodium hydroxide solution, while magnesium remains unchanged.
Classification and Application
Alloys can be divided into metal metal alloys (such as steel, brass) or metal non-metal alloys (such as aluminum alloys). Widely used in various fields such as machinery, construction, aerospace, and automobiles, alloys play an important role in improving product performance and extending service life due to their unique physical and chemical properties.