Nichrome (NiCr, nickel-chrome, chrome-nickel, etc.) is any of various alloys of nickel, chromium, and often iron (and possibly other elements). The most common usage is as resistance wire, although they are also used in some dental restorations (fillings) and in a few other applications.
Similarly, it is asked, why do we use Nichrome wire?
Most heating elements use nichrome 80/20 (80% nickel, 20% chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time.
Why does a Nichrome wire heat up?
Nichrome wire has far, far higher resistance per unit length at a given cross section. It's an alloy chosen for that property. The power dissipated in a resistor is the product of the resistance and current, so a larger resistance at the same current means more power dissipated as heat. Nichrome is an resistive alloy.
What is the resistivity of a Nichrome wire?
The unit of resistivity is then ohm-meters (Ωm). Nichrome, a non-magnetic alloy that is commonly made up of 80% nickel and 20% chromium, has a resistivity ranging from 1.10 × 10−6 Ωm to 1.50 × 10−6 Ωm (0.00000110 Ωm to 0.00000150 Ωm) and a very high boiling point (~1400 °C).