Resistance Heating Wire, Nickel-Chromium Alloy, 80% Nickel/ 20% Chromium

Resistance Heating Wire Nickel-Chromium
Alloy 80% Nickel / 20% Chromium - NI80

Features
	Withstands High Temperatures up to 2100°F
	Quick Heating, Long Life
	Corrosion Resistant
	Used to Make Straight or Helical Coil Resistance Heaters
	Convenient 50 ft. and 200 ft. Spools Available

NEWPORT® NIC80 wire is a resistance heating wire comprised of 80% Nickel and 20% Chromium. NIC80 wire is commonly used as a resistor at elevated temperatures. NI/CR-80/20 is essential for resistor elements in high temperature applications such as electric furnaces, electric ranges and radiant heaters operating at temperatures up to 1150°C (2100°F).

In addition to these qualities and standard uses, it has found wide application in technical applications due to its combination of high electrical resistance and its temperature coefficient of resistance much less than that of Nickel-Chrome 60.

Specifications
Composition: 80% Ni, 20% Cr
Specific Resistance: 650 Ohms per circular mil-foot at 68°F (20°C). See table below for multiplication factors to obtain resistance at other temperatures.
Specific Gravity: 8.41
Density: 0.304 lb/in³
Melting Point: approx. 1400°C (2550°F)
Nominal Coefficient of Linear Expansion: 0.000017 (10-1000°C)
Tensile Strength (lb/in²) at 20°C (68°F): Hard Drawn: 200,000 Soft Annealed: 100,000
Nominal Temperature Coefficient of Resistance: 0.00011 Ohms/Ohm/°C (20-500°C)

Factor by Which Resistance at Room Temperature Is to Be Multiplied to Obtain Resistance at Indicated Temperatures (These figures are given as a basis for engineering calculations and represent average material as supplied.)

Temp. °F	68	200	400	600	800	1000	1200	1400	1600	1800	2000°F
Temp. °C	20	93	204	315	427	538	649	760	871	982	1093°C
Factor	1.000	1.016	1.037	1.054	1.066	1.070	1.064	1.062	1.066	1.072	1.078

Model #	AWG	*Current Temperature Characteristics °C (°F)**
Model #	AWG	425 (800)	550 (1000)	650 (1200)	750 (1400)	875 (1600)	1100 (2000)
NI80-040-(†)	18	8.32	10.17	12.48	15.11	18.06	24.03
NI80-032-(†)	20	6.17	7.56	9.24	11.13	13.23	17.57
NI80-025-(†)	22	4.62	5.62	6.85	8.20	9.69	12.85
NI80-020-(†)	24	3.46	4.18	5.06	6.04	7.10	9.40
NI80-015-(†)	26	2.62	3.12	3.76	4.49	5.27	6.90
NI80-012-(†)	28	1.98	2.38	2.84	3.37	3.93	5.09
NI80-010-(†)	30	1.50	1.81	2.14	2.53	2.93	3.75

CONTINUED

Model #	AWG	Dia.	Ohms per ft @ 20°C (68°F)
Model #	AWG	Dia.	Ohms per ft @ 20°C (68°F)
NI80-040-(†)	18	0.040"	.4062
NI80-032-(†)	20	0.032"	.6348
NI80-025-(†)	22	0.0253"	1.015
NI80-020-(†)	24	0.0201"	1.609
NI80-015-(†)	26	0.0159"	2.571
NI80-012-(†)	28	0.0126"	4.094
NI80-010-(†)	30	0.010"	6.50

* Showing approximate amperes necessary to produce a given temperature, applying only to a straight wire stretched horizontally in free air.
Note: This wire is not intended for use in making thermocouple elements.
† Specify desired length in feet: 50 or 200.
Ordering Example: NI80-040-50 is a 50' spool of 18 gage bare wire, $21.