= Invar
{wiki=Invar}
Invar is a nickel-iron alloy characterized by its minimal thermal expansion properties. Composed primarily of about 36% nickel and 64% iron, it exhibits a very low coefficient of thermal expansion, meaning that it does not expand or contract significantly with temperature changes. This unique property makes Invar particularly useful in applications requiring dimensional stability over varying temperatures. Invar is commonly used in precision instruments, gauges, clocks, and other applications where maintaining exact measurements is critical.
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