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Steel - Wikipedia Steel is an alloy of iron and carbon that demonstrates improved mechanical properties compared to the pure form of iron Due to its high elastic modulus, yield strength, fracture strength and low raw material cost, steel is one of the most commonly manufactured materials in the world
Steel | Composition, Properties, Types, Grades, Facts | Britannica The major component of steel is iron, a metal that in its pure state is not much harder than copper Omitting very extreme cases, iron in its solid state is, like all other metals, polycrystalline—that is, it consists of many crystals that join one another on their boundaries