Cr20Ni80 Alloy Heating Resistance Wires are widely used as the high resistance alloy for electrical heating and wire-wound resistors in metallurgical industy, chemcal industry and electrical industry,etc.
Cr20Ni80 Alloy Heating Resistance Wire has higher electrical resisitance coefficient, good anti-oxidation and anti-corrosion performance, and it also has good mechanical workability, with a high strength at high temperature.
? main characteristics of Cr20Ni80 Alloy Heating Resistance Wire
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Nichrome Alloy Heating Wire
Properties/Grade			Cr20Ni80	Cr30Ni70	Cr15Ni60	Cr20Ni35	Cr20Ni30
Main chemical composition %		Cr	20.0-23.0	28.1-31.0	15.0-18.0	18.0-21.0	30.0-34.0
		Ni	Rest	Rest	55.0-61.0	34.0-37.0	18.0-21.0
		Fe	≤1.0	≤1.0	Rest	Rest	Rest
Man Working Temp °C			1200	1250	1150	1100	1100
Melting Point °C			1400	1380	1390	1390	1390
Density g/cm3			8.4	8.1	8.2	7.9	7.9
Resisivity(20°C)μΩ·m			1.09±0.05	1.18±0.05	1.12±0.05	1.04±0.05	1.04±0.05
Specific Heat(20°C)?J/g.°C			0.44	0.461	0.494	0.5	0.5
Heat Conductivity KJ/m·h·°C			60.3	45.2	45.2	43.8	43.8
Cofficient of Thermal Expansion a×10-6/°C			18	17	17	19	19
Tensile Strength?Mpa			>85	>85	>85	>85	>85
Elongation %			≥20	≥20	≥20	≥20	≥20
Repeatedly Bend Frequency F/R			>12	>12	>12	>12	>12
Microghpic Structure			austenite
Magnetic Property			Nonmagnetic

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