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# Which alloy is used for welding?

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## AlloysAn alloy is a homogeneous mixture of two or more metals or of one or more metals with certain non-metallic elements. The properties of alloys are often greatly different from those of their constituents.SolderThe alloy used for welding is solder.Solder is an alloy of tin $\left(\mathrm{Sn}\right)$and lead $\left(\mathrm{Pb}\right)$. Solder is a mixture of $63%$ tin and $37%$lead.Solder has a low melting point.

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