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How is stainless steel different from pure iron?

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Some differences between stainless steel and pure iron are given below:

Property Stainless Steel (an Alloy of iron) Pure Iron
Composition Iron (Fe) + chromium (Cr)+ nickel (Ni) + carbon (C) Mostly iron (Fe) with very few impurities
Strength Stronger and harder Relatively soft and malleable
Corrosive resistance Highly resistant due to chromium forming a protective oxide layer Rusts easily when exposed to moisture and oxygen
Cost More expensive due to alloying elements Cheaper compared to stainless steel
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Saniya Khatri

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