80/20 Ni Cr Resistance Wire

80/20 Ni Cr Resistance Wire is an alloy used at operating temperatures up to 1200°C (2200°F). Its chemical composition gives good oxidation resistance, especially under conditions of frequent switching or wide temperature fluctuations. This makes it ideal for a wide variety of applications including heating elements in domestic and industrial appliances, wire-wound resistors, through to the aerospace industry.

80/20 Ni Cr Resistance Wire is also known as Nichrome / Nicrhrome V, Brightray C, Cronix 80, Nicrothal 80, Chromalloy, Chromel, and Gilphy 80.

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Chemical Composition

The chemical composition of 80/20 Ni Cr Resistance Wire is indicated in the table below:

Element	Min %	Max %
C	–	0.15
Si	0.50	2.00
Mn	–	1.00
P	–	0.02
S	–	0.015
Cr	19.00	21.00
Ni	75.00	–
Al	–	0.30
Cu	–	0.50
Fe	–	1.00

Alloy Details

80/20 Ni Cr Resistance Wire density, electrical resistivity, operating temperature, melting point, and coefficient of expansion is indicated in the table below:

Density	Electrical Resistivity at 20 °C	Maximum operating temperature for use as a Heating Element	Maximum operating temperature for use in Hot Cutting, Fabrication – Line Bending	Melting Point	Coefficient of Expansion
8.31g/cm³	108 microhm • cm	1200 °C	300 °C	1400 °C	12.5 µm/m °C (20 – 100°C)
0.300 lb/in³	650 ohm. Circ. mil/ft	2200 °F	572 °F	2550 °F	7.0 x 10^-6 in/in °F (70 – 212°F)