Cr20Ni80 furnace wire

Heating furnace wire is a nickel-chromium alloy known for its high resistivity and good oxidation resistance. It maintains a stable microstructure and electromechanical properties at high temperatures. Heating furnace wire also possesses good high-temperature mechanical properties, cold deformation plasticity, and weldability. These characteristics lead to its wide application in industries such as industrial furnaces, metallurgy, machinery, electrical appliances, aircraft, automobile manufacturing, and military applications.

Category：

Nickel-chromium series

Keywords：High resistance electric heating alloy | Corrosion-resistant alloy | Thermal spraying materials

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Cr20Ni80 furnace wire

Heating furnace wire is a nickel-chromium alloy, known for its high resistivity and good oxidation resistance. It maintains a stable microstructure and electromechanical properties at high temperatures. Heating furnace wire also exhibits good high-temperature mechanical properties, cold deformation plasticity, and weldability.


High resistivity	Oxidation resistance	High-temperature mechanical properties	Weldability

These characteristics make it widely used in various industries, including industrial furnaces, metallurgy, machinery, electrical appliances, aircraft, automotive manufacturing, and military applications.

Chemical Composition

Alloy Grade	Chemical Composition (Mass Fraction)/%
	C	P	S	Mn	Si	Cr	Ni	Al	Fe	Others
	Not greater than
Heating furnace wire	0.08	0.020	0.015	0.60	0.75～1.60	20.0～23.0	Remainder	≤0.50	≤1.0	—

Physical Properties

Alloy Grade	Maximum Component Operating Temperature ℃	Melting Point (Approximate) ℃	Density g/cm³	Resistivity (20 ℃) μΩ ·m	Specific Heat Capacity J/(g·K	Thermal Conductivity (20 ℃) W/(m·K)	Average Linear Expansion Coefficient α (20℃~1000 ℃) 10-*/K	Microstructure	Magnetic Properties
Heating furnace wire	1200	1400	8.40	1.09	0.46	15	18.0	Austenite	Non-magnetic

Mechanical Properties

Alloy Grade	Alloy State	Tensile Strength Rm/MPa Not less than	Elongation A/% Not less than
			Diameter >3.00 mm all wires and thickness >0.200 mm nickel-chromium strip	Diameter 0.10 mm～3.00 mm all wires and thickness >0.200 mm iron-chromium-aluminum strip
Heating furnace wire	Solid solution	650	25	20

Cr20Ni30

none

Cr20Ni80 furnace wire

High resistivity

Oxidation resistance

High-temperature mechanical properties

Weldability