Product Details

Cr20Ni80 electric resistance nichrome heating strip

Nichrome is a non-magnetic alloy of nickel, chromium, and often iron, usually used as a resistance wire. Patented in 1905, it is the oldest documented form of resistance heating alloy. A common alloy is 80% nickel and 20% chromium, by mass, but there are many others to accommodate various applications. It is silvery-grey in colour, is corrosion-resistant, and has a high melting point of about 1400 °C (2552 °F). Due to its relatively high electrical resistivity and resistance to oxidation at high temperatures, it is widely used in electric heating elements, such as in hair dryers, electric ovens, soldering iron, toasters, and even electronic cigarettes. Typically, Nichrome is wound in coils to a certain electrical resistance, and current is passed through to produce heat.

high-resistance electrothermal alloy products :

high-purity

low impurity resistivity stability

temperature coefficient small

superficial body Sexual good

and the higher intensity

high temperature performance

good processing

Technical Data

(Alloy Nomenclature) Performance		Cr20Ni80	Cr30Ni70	Cr15Ni60	Cr20Ni35	Cr20Ni30
Main Chemical composition	Ni	Rest	Rest	55.0-61.0	34.0-37.0	30.0-34.0
	Cr	20.0-23.0	28.0-31.0	15.0-18.0	18.0-21.0	18.0-21.0
	Fe	≤1.0	≤1.0	Rest	Rest	Rest
Max. continuous service temp. of element		1200	1250	1150	1100	1100
20 (μΩ·m) Resistivity at 20ºC		1.09	1.18	1.12	1.0	1.04
(g/cm³) Density		8.40	8.10	8.20	7.90	7.90
(KJ/m·h·ºC) Thermal conductivity		60.3	45.2	45.2	43.8	43.8
(α×10^-6/ºC) Coefficient of lines expansion		18.0	17.0	17.0	19.0	19.0
( ºC) Melting point (approx.))		1400	1380	1390	1390	1390
(%) Elongation at rupture		>20	>20	>20	>20	>20
Micrographic structure		austenite	austenite	austenite	austenite	austenite
Magnetic properties

Application

metallurgical, electrical, mechanical components and electrical manufacturing industries

Packaging & Shipping

spool and cartons or as customer's requirement