Which metal is the main ingredient in nichrome wire?

Nickel is the main ingredient in nichrome wire. Nichrome is a resistance alloy made primarily from nickel and chromium, with some varieties also containing iron.

Nichrome is useful because it has relatively high electrical resistance and can withstand high temperatures. When electric current passes through the wire, electrical resistance converts energy into heat. The alloy also forms a protective chromium-rich oxide layer, helping it survive repeated heating in air.

Nichrome wires are found in toasters, hair dryers, electric ovens, laboratory heaters, and cutting tools for foam. Their performance depends on wire diameter, length, alloy composition, and the amount of current supplied. A thin, long wire generally has more resistance than a thick, short wire made from the same material.

The name nichrome combines parts of nickel and chromium, but the alloy is not necessarily composed of equal amounts. Common formulations contain substantially more nickel than chromium, while iron may be added to reduce cost or alter mechanical properties.