Nichrome Electric Heating Coil

Nichrome Heating Coil

Nichrome Heating Coil is a name for a Nickel-Chromium Heating Coil, it is corrosion resistant, and has high melting point of about 1400 °C (2552 °F). The heating coilhas relatively high resistivity and very good resistance to oxidation at high temperatures.

Nichrome Heating Coils have many advantages, such as deformation ability, thermal stability, mechanical character, shockproof ability in thermal state and anti-oxidization. For heating, resistance Heating Coil must be stable in air when hot. Nichrome Heating Coil forms a protective layer of chromium oxide when it is heated for the first time. Material beneath the layer will not oxidize, preventing the Heating Coil from breaking or burning out. Due to Nichrome Heating Coil's relatively high resistivity and resistance to oxidation at high temperatures, Nichrome Heating Coil is widely used in heating elements, electric furnace heating and heat-treating processes in the chemical, mechanical, metallurgical and defense industries, such as in hair dryers, electric ovens, toasters, vacuum coating, inner components of vacuum valves, etching resistor, brake resistor, tube heater, sealer and boiler.

Nichrome Heating Coil also has good anti-corrosion and high resistant co-efficiency. Nichrome Heating Coil is commonly used in ceramics as an internal support structure to help some elements of clay sculptures hold their shape while they are still soft.

Nickel Chromium alloys Comparison:
Material		Cr20Ni80	Cr30Ni70	Cr15Ni60	Cr20Ni35	Cr20Ni30
Component %	Ni	Remanent	Remanent	55.061.0	34.037.0	30.034.0
	Cr	20.023.0	28.031.0	15.018.0	18.021.0	18.021.0
	Fe	≤1.0	≤1.0	Remanent	Remanent	Remanent
Highest temperature		1200	1250	1150	1100	1100
Melting point		1400	1380	1390	1390	1390
Density g/cm3		8.4	8.1	8.2	7.9	7.9
Resistance ratio μΩ·m,20		1.09±0.05	1.18±0.05	1.11±0.05	1.04±0.05	1.04±0.05
Extend ratio %		≥20	≥20	≥20	≥20	≥20
Specific heat J/g.		0.44	0.461	0.494	0.5	0.5
coefficient of heat conductivity KJ/m.h		60.3	45.2	45.2	43.8	43.8
Wire expand coefficient a×10-6/201000		18	17	17	19	19
Micro-organization		Austenite	Austenite	Austenite	Austenite	Austenite
Magnetism		Non-magnetism	Non-magnetism	Non-magnetism	Non-magnetism	Non-magnetism